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Embroidery => General Embroidery => Topic started by: Homer on November 18, 2016, 08:25:56 AM

Title: bobbin tension issues
Post by: Homer on November 18, 2016, 08:25:56 AM
my bobbin tension is drastically changing every 1k stitches or so. We have brand new bobbin cases, brand new rotary hooks, different kinds of bobbins, magnetic core, magnetic sides, paper sides, no sides..ALL of them do the same thing on all 3 of my machines. They will sew a shirt or two then go wonky for an hour. I toss out the bobbin and get a new one but this is just nuts.. Any ideas on what to look at?



Title: Re: bobbin tension issues
Post by: mk162 on November 18, 2016, 08:41:56 AM
clean your hook, it sounds to me like you have a ton of lint in there that is getting into the bobbin spring.  Run a business card under the bobbin spring and clean that stuff out
Title: Re: bobbin tension issues
Post by: lrsbranding on November 18, 2016, 11:08:36 AM
You have an embroidery gremlin. It probably showed up from the super moon. Shut everything down, go have a big mexican lunch with chips and queso (a margarita would help) then start over.  I had a problem with oddball loops between different heads and machines. The queso fixed that.

 Blow everything out and recheck tensions. The odd thing is the same problem across all heads on 3 different machines. What is the common ground on all machines? I second the bobbin case lint. Did you change backing recently? I use the Fil-Tec magnetic bobbins and have found that a lot of them are oversize. They drag on the bobbin case at first. If you check tension straight away on a new bobbin it will appear too tight so you adjust it then all of a sudden it loosens up. On a new bobbin pull out the thread slowly until you feel it running smoothly then check the tension. 
Title: Re: bobbin tension issues
Post by: inkman996 on November 18, 2016, 11:36:41 AM
Yep make sure your bobbins are not over wound, in fact always store bobbins that are no good in a box and then return them when you have a full box.

I also second cleaning the hooks on all cases, it is a must especially if doing a messy material or using an odd backing. One of the best things I implemented years ago was always having one full set of cases cleaned, tensioned and ready to go for every head. Once a day swap in the ready set and during long runs the operator can have the next set always ready to go.
Title: Re: bobbin tension issues
Post by: Homer on November 18, 2016, 12:21:51 PM
been battling this for the past 3 hours. I cleaned the cases, I think I might grab some carb cleaner and really clean them. I am using the magna glide magnetic bobbins now. I get one machine to sew perfect, next shirt goes on and looks terrible. Same backing I've been using for a long time. same hoop, same person hooping.

One thing I did notice was the way we were using the gauges, my employee was pulling the thread out fast and not really giving an accurate reading on the gauges. So I watched a few youtubes and noticed we should slowed down a bit pulling on the thread.  They are sewing a little better but they keep changing tensions. I had to stop, I'm about to loose it.. This has been going on for about 3 weeks.

thanks for the help guys, I'll go look at it with fresh eyes in a few. only 150 more polos to sew.  ::)

e
Title: Re: bobbin tension issues
Post by: 3Deep on November 18, 2016, 12:39:37 PM
Get a can of compressed air and blow out any lint around the tension knobs and inside the case, lint can really cuz sewing problem's, embroidery machine can be a real pain in the booty.
Title: Re: bobbin tension issues
Post by: ftembroidery on November 18, 2016, 01:35:41 PM
I don't know what machines you have, but on our Tajimas the manual says to pull the thread out of the bobbin at a specific rate when setting tension.  Also, with the change of seasons, you might need to check for reasonably consistent shop temp and humidity.
Title: Re: bobbin tension issues
Post by: Doug B on November 18, 2016, 01:46:27 PM
  Humidity can be a real factor. There have been times that everything is fine all
morning and then after lunch all heck breaks loose for no other apparent reason.
Title: Re: bobbin tension issues
Post by: Homer on November 18, 2016, 02:03:05 PM
thanks guys, I have an air drop in the emb room so we are always blowing out the hooks and cases.  Now that you mention it, it is 70 today and calling for snow on Sunday :o..maybe it's messing with us? I dunno.

I'd rather go home get drunk and watch the golden girls. this is just stupid. too bad I don't drink. might start after this week.
Title: Re: bobbin tension issues
Post by: mooseman on November 18, 2016, 03:13:27 PM
when sew goes to hell and you are thinking it is the bobbin are you going back in and checking the bobbin tension to see if it different than when your first set it?
Also what about lubrication if you do not have the bobbin assembly, drive shaft and all the junk that spins the bobbin things could be heating up a little. Not much heat change will make a difference in the tension of the bobbin spring and possibly change the teshion or grab of the spring a ton!
Use your temp gun to take temps on the bobbin case through the good to bad cycle.
Additionally don't just focus on the bobbin could be your upper tensions going wacky the tensions are relatively driven by each other.
the fact that you re getting this on all your stuff the same suggests there is something in the environment that all machines share sourcing the issue.
Good luck and this is why I am trying to sell my 4 head......................................... EMBROIDERY is a PITA >:(
mooseman   
Title: Re: bobbin tension issues
Post by: Gilligan on November 18, 2016, 03:14:20 PM

I'd rather go home get drunk and watch the golden girls. this is just stupid. too bad I don't drink. might start after this week.

But you DO watch the Golden Girls.
Title: Re: bobbin tension issues
Post by: Homer on November 18, 2016, 03:26:24 PM
thanks Moose, I am oiling it up. here's my steps. grab a new bobbin, put it in a clean case, check tension reading, adjust as needed. trying to be in the 180-200 range on my meter. Put the bobbin in, start sewing. sews, trims, looks great....half way through the design it all goes to f...pull out the bobbin, check the tension and it dropped to under 100... all 3 machines are doing it. Thing is, it will sew perfect for a shirt or two then go wonky for an hour. I'll try slowing them down and see if that helps.

Gilly... 8) who doesn't...?
Title: Re: bobbin tension issues
Post by: mk162 on November 18, 2016, 03:27:54 PM
It seems you are doing something wrong with the bobbin then.  Like the springs are dirty or you aren't threading them right.
Title: Re: bobbin tension issues
Post by: Homer on November 18, 2016, 03:31:01 PM
It seems you are doing something wrong with the bobbin then.  Like the springs are dirty or you aren't threading them right.

that's why I use the magnetic ones  ;D

It has been fine for the past, ohhh 4 years....then few weeks ago it married it's cousin or some damn thing. I don't freakin know. maybe I am.
Title: Re: bobbin tension issues
Post by: ebscreen on November 18, 2016, 03:49:10 PM
We've had weird stuff happen when the temperature changes drastically. EMB in climate controlled room now.
Title: Re: bobbin tension issues
Post by: whitewater on November 18, 2016, 05:17:45 PM
3 words...

Read The Manual

 :-*
Title: Re: bobbin tension issues
Post by: Gilligan on November 18, 2016, 06:14:27 PM
thanks Moose, I am oiling it up. here's my steps. grab a new bobbin, put it in a clean case, check tension reading, adjust as needed. trying to be in the 180-200 range on my meter. Put the bobbin in, start sewing. sews, trims, looks great....half way through the design it all goes to f...pull out the bobbin, check the tension and it dropped to under 100... all 3 machines are doing it. Thing is, it will sew perfect for a shirt or two then go wonky for an hour. I'll try slowing them down and see if that helps.

Gilly... 8) who doesn't...?

...The card attached would say...
Title: Re: bobbin tension issues
Post by: mooseman on November 19, 2016, 06:13:26 AM
Homer
you mentioned you bought all new bobbin cases for all your machines. I would focus on them as either they are rubbing on something and heating up or they may just be junk. Go back to ONE of your old bobbin cases and try that relative to the new case.
There is no real reason for the actual tension to change unless something mechanical is happening, heat, loose screw, etc.
PS someone who had a ton more embroidery experience than me told me a long time ago..when you change stuff change one thing at a time , take time to understand the result and go from there. If you change a bunch of stuff you will have no idea WTF happened wrong or right.
If all else fails this guy is pretty good and local, $50.00 to get him there as I recall. He serviced my machines about a year ago, nice job, knows his stuff.  http://www.doctorcarlsewandvac.com/ (http://www.doctorcarlsewandvac.com/)
mooseman
Title: Re: bobbin tension issues
Post by: Prōdigium on November 19, 2016, 07:13:41 AM
Quote
PS someone who had a ton more embroidery experience than me told me a long time ago..when you change stuff change one thing at a time , take time to understand the result and go from there. If you change a bunch of stuff you will have no idea WTF happened wrong or right.

That has something to do with embroidery, but with EVERYTHING in life.....Start turning all the screws in life like a madman and quickly you will find things go out of control. Learned this lesson long ago working as an auto tech.

As a person who knows next to nothing about embroidery and often has a hard time spelling it, I would say your on target. Go back to what you know works, make controlled steps to ascertain the problem.
Title: Re: bobbin tension issues
Post by: Homer on November 19, 2016, 08:47:11 AM
thanks, that's exactly what I do. I am keeping a log on all our changes on each machine to see what happens. I'm going in today to see if I can nail this down. thanks for the help guys.
Title: Re: bobbin tension issues
Post by: JBLUE on November 19, 2016, 12:29:39 PM
Sh!tty bobbin cases will do this from time to time as well. When they get warm the spring softens which is backwards from what you would think. Then it cools back down and works fine.
Title: Re: bobbin tension issues
Post by: Itsa Little CrOoked on November 21, 2016, 10:00:12 AM
Jay, I can't imagine how this could be your problem....but it might be worth mentioning. It's mostly a word of encouragement, I guess.

Once a couple of years ago, I DID HAVE an issue with a single rotary hook on 1 (one) head of my 4 head Tajima. I had previously been setting radically different UPPER AND LOWER tensions on that particular head to match the results of the other heads. The bobbin tensions were repeatedly measured on a TOWA gauge and the cheapo stick guage for upper tensions, and NEVER EVER would work the same as the other heads.

Turns out, it was a rotary hook the whole time. I still can barely believe it.... I replaced that hook and BOOM! The problem vanished instantly. (It just can't be, but I assure you....It was!) I had been scratching my head and posting to embroidery forums and Tajima user groups for a long period of time, but never got an answer until someone finally suggested replacing the rotary hook on that head. I thought what the heck. I may as well "cast my net on the other side of the boat". I'm still in a state of disbelief that the hook could have been the problem.

The rotary hook doesn't sound like your issue, except to say, don't be afraid to think outside the box. It's just a machine, no magic is involved. It's possible you are missing something basic. Dunno what, but you'll figure this out.
Title: Re: bobbin tension issues
Post by: mk162 on November 21, 2016, 10:09:03 AM
I really want to know what is causing this.  It just seems crazy
Title: Re: bobbin tension issues
Post by: Admiral on November 21, 2016, 11:35:48 AM
It seems you are doing something wrong with the bobbin then.  Like the springs are dirty or you aren't threading them right.

that's why I use the magnetic ones  ;D

It has been fine for the past, ohhh 4 years....then few weeks ago it married it's cousin or some damn thing. I don't freakin know. maybe I am.

Magnetic core or magnetic side?

I threw out the magnetic side ones right after we tried those...
Title: Re: bobbin tension issues
Post by: Doug B on November 21, 2016, 11:46:24 AM
  I threw out the magnetic core ones. I also foung out just today that there
was a LOT of lint built up in the bobbin cases. The whole machine is running
much better after cleaning.
Title: Re: bobbin tension issues
Post by: mk162 on November 21, 2016, 11:49:48 AM
I didn't know magnetic side ones existed.  We use the Filtec MagnaGildes.  I doubt we will go back to paper sided.  Too much dust and lint buildup form the cardboard.
Title: Re: bobbin tension issues
Post by: Homer on November 21, 2016, 01:12:53 PM
I might have this fixed.

I tried mag sided and mag core. I have 2 or 3 boxes of madeira magnetic sided bobbins of anyone wants them. piece 'sh*t they are.

I have a towa M-1 gauge, it reads in Nm from 100-400. From what I have found online, it should read 180-220 for the tension. had them running great on saturday, fire up this morning a, put it in my gauge and it was reading off the charts, over 400. put it in the machine and a little tweaking, them bastards have been running nonstop for 2 hours now.

the only thing that changed was going from mag core to sided bobbins, and then 2 days later going right back to mag core.  that's when it all started. So now I need to find a different gauge I guess.
Title: Re: bobbin tension issues
Post by: inkman996 on November 21, 2016, 01:27:07 PM
I might have this fixed.

I tried mag sided and mag core. I have 2 or 3 boxes of madeira magnetic sided bobbins of anyone wants them. piece 'sh*t they are.

I have a towa M-1 gauge, it reads in Nm from 100-400. From what I have found online, it should read 180-220 for the tension. had them running great on saturday, fire up this morning a, put it in my gauge and it was reading off the charts, over 400. put it in the machine and a little tweaking, them bastards have been running nonstop for 2 hours now.

the only thing that changed was going from mag core to sided bobbins, and then 2 days later going right back to mag core.  that's when it all started. So now I need to find a different gauge I guess.

Never used a gauge never will. Any good operator will be able to do the drop test and have the tension perfect just from feel and knowledge of how the machine likes to run. Don't know about your tech but every tech ever in our shop says the same thing, stay away from the gauges, learn the feel for your self and you are good to go. Some shops by the guage and end up chasing a tension that they think is supposed to work but it simply won't on their particular machine.

Title: Re: bobbin tension issues
Post by: Doug B on November 21, 2016, 02:02:44 PM
  I have used a gauge. I think it was on a Tuesday. They are not indicative of the
way tension should be on every machine. I use both L and M bobbins on two different
machines. I have NEVER been able to set tension "by the book" and have it work
flawlessly.
Title: Re: bobbin tension issues
Post by: Homer on November 21, 2016, 02:16:47 PM
well now you tell me, thanks guys  ;D...I just assumed that was the correct way to go about it. I want anyone walking up to the machine to have the same settings. I guess it doesn't work that way. great! another variable.  ::)

so you're saying I should take the gauge to the range? excellent.
Title: Re: bobbin tension issues
Post by: bimmridder on November 21, 2016, 02:36:35 PM
Put the gauges on the list of sh!t you're giving away
Title: Re: bobbin tension issues
Post by: 1964GN on November 21, 2016, 02:46:59 PM
The gauges are pretty darn helpful for a newbie. As you become more sensitive the "feel" of the machine the gauges become unnecessary, for the most part.
Title: Re: bobbin tension issues
Post by: ftembroidery on November 21, 2016, 03:44:34 PM
If I start a fight here or step on some toes, I want to apologize for any hurt feelings up front. 

I'm a retired Master Mechanic with 45 years in the trade.  Both on cars/light trucks and aircraft.  Would you get on an airplane knowing the mechanic put the wing spars on and just used the "calibrated elbow" he was born with? Would "it feels tight enough" be good enough?  I've learned to respect the people that design the machine (car, airplane, embroidery machine) as having more insight into the proper operation and maintenance than myself.  I'm not going to think I know more than the designer.  Arrogance and narcissism is not a desirable characteristic (with the possible exception of running for political office).

You don't have to be off on bobbin tension by much at all to cause more headaches then a liquid lunch at the local restaurant can dull.  Gauges (properly calibrated) are the ONLY way to put everything on a level playing field.  I once had a thread gauge get "out of whack" because a nut had come loose and I hadn't noticed it right away.  I have a specific gram-weight for both gauges so that I can be certain they are in proper calibration.  I don't have tension issues.  When setting bobbin tension, the adjustment is so critical that just putting the screwdriver in the slot of the screw and THINKING tighten can change tension.

We use the Magna-Glide magnetic core bobbins.  I have found them to be excellent.  I get rid of the first couple of yards before I set tension and I get almost ZERO lint in the case.  I have tried the Madeira magnetic sided bobbins and was so displeased with the quality (out of round, shaft off-center, etc) that I provided a strongly worded letter of complaint to Madeira and they exchanged them for Magna-Glide.

Be certain your machine(s) is/are clean and properly adjusted (hook timing, etc.), cleaned and lubricated.  With properly calibrated/functioning gauges, set your tensions (upper & lower) to your manufacturers recommendations and see what happens.  After that, proceed with MINOR or FINE TUNING adjustments as to fit your style of embroidery, prevent pucker, adjust for type of material and weave or knit.  Make those adjustments ONE AT A TIME and record the results. 

Remember....pilots are taught to TRUST THEIR GAUGES and NOT to "fly by the seat of their pants".
Title: Re: bobbin tension issues
Post by: inkman996 on November 21, 2016, 03:54:03 PM
If I start a fight here or step on some toes, I want to apologize for any hurt feelings up front. 

I'm a retired Master Mechanic with 45 years in the trade.  Both on cars/light trucks and aircraft.  Would you get on an airplane knowing the mechanic put the wing spars on and just used the "calibrated elbow" he was born with? Would "it feels tight enough" be good enough?  I've learned to respect the people that design the machine (car, airplane, embroidery machine) as having more insight into the proper operation and maintenance than myself.  I'm not going to think I know more than the designer.  Arrogance and narcissism is not a desirable characteristic (with the possible exception of running for political office).

You don't have to be off on bobbin tension by much at all to cause more headaches then a liquid lunch at the local restaurant can dull.  Gauges (properly calibrated) are the ONLY way to put everything on a level playing field.  I once had a thread gauge get "out of whack" because a nut had come loose and I hadn't noticed it right away.  I have a specific gram-weight for both gauges so that I can be certain they are in proper calibration.  I don't have tension issues.  When setting bobbin tension, the adjustment is so critical that just putting the screwdriver in the slot of the screw and THINKING tighten can change tension.

We use the Magna-Glide magnetic core bobbins.  I have found them to be excellent.  I get rid of the first couple of yards before I set tension and I get almost ZERO lint in the case.  I have tried the Madeira magnetic sided bobbins and was so displeased with the quality (out of round, shaft off-center, etc) that I provided a strongly worded letter of complaint to Madeira and they exchanged them for Magna-Glide.

Be certain your machine(s) is/are clean and properly adjusted (hook timing, etc.), cleaned and lubricated.  With properly calibrated/functioning gauges, set your tensions (upper & lower) to your manufacturers recommendations and see what happens.  After that, proceed with MINOR or FINE TUNING adjustments as to fit your style of embroidery, prevent pucker, adjust for type of material and weave or knit.  Make those adjustments ONE AT A TIME and record the results. 

Remember....pilots are taught to TRUST THEIR GAUGES and NOT to "fly by the seat of their pants".

Sure it sounds good and all but we are not flying airplanes. Any good operator can look at the top and bottom of embroidery and see exactly what needs to be set. Its experience and pretty much a craft. If your shop and the people working in it have been running excellent embroidery for over 15 years with out a gauge ever then your doing something right. We have had so many techs come though our shop over the years either tuning up machines or installing new ones and never has one ever pulled out a gauge. I am not saying you are incorrect in your thought process its good procedure if it works for you. Me or any of the other people here that run emb can set tension on a bobbin in a mere few seconds every time any time. Just like any machinist they know their personal lathe/mill and its quirks even if the dial indicators show a tiny amount of run off they know the machines and how to run them to be accurate.
Title: Re: bobbin tension issues
Post by: mooseman on November 21, 2016, 07:16:19 PM
Gauges are fine if you don't have a clue and don't want to ever have one.
All embroidery machines are quirky pieces of mechanical junk. The actual complexity of the machinery comes no where close to the $ we pay to own the junk, that is simply the price of admission.
At the end of the day the person who fixes the machine has to be the person who operates the machine.

Over the years I have come to know my 4 head lunker so well I can tell just by the sound when things are not going well.
Additionally I think I know the characteristics well enough to know what speed to run initially simply based on looking at the design and the digitizing. We me and that machine have an understanding, it talks to me and I do not let anyone else ever lay a hand on it.
mooseman
Title: Re: bobbin tension issues
Post by: Homer on November 21, 2016, 08:43:41 PM
Gauges are fine if you don't have a clue and don't want to ever have one.
All embroidery machines are quirky pieces of mechanical junk. The actual complexity of the machinery comes no where close to the $ we pay to own the junk, that is simply the price of admission.
At the end of the day the person who fixes the machine has to be the person who operates the machine.

Over the years I have come to know my 4 head lunker so well I can tell just by the sound when things are not going well.
Additionally I think I know the characteristics well enough to know what speed to run initially simply based on looking at the design and the digitizing. We me and that machine have an understanding, it talks to me and I do not let anyone else ever lay a hand on it.
mooseman

making that a hard sell for me moose ;D :o

I always went by "feel" but that didn't seem right to me because I just didn't know what was right..if it sewed, was it right? sure, close enough I guess.... I wanted to eliminate variables, I'd like to tell my embroidery girl to set the bobbin to 180, top tension to 150 and roll. I set the tensions to the manufacturer specs but it didn't seem to work.

The magnetic sided madeira bobbins you are speaking of are the ones I tried, they were horrendous. I had to get something quick and that's all I could get. I went back to the magnetic core ones and they are at least consistent. I thought everyone used a gauge, seems to make the most sense to me, decent starting point anyway.
Title: Re: bobbin tension issues
Post by: Itsa Little CrOoked on November 21, 2016, 09:56:39 PM
Count me in for gauges. (AND MAGNA GLIDE BOBBINS!) But they guages arent perfect.

We have turnover in our shop. I ALWAYS show them gauges at the very start, and move them towards the "drop test" right away. The extremely cheapo stick gauges I've seen are miserable if real accuracy in upper thread tensions is the goal. But if understood as a learning tool, to compare one to another, I will always think new hires can benefit.

Balance between upper and lower tensions is a higher goal than overall tension for most work.  Huge, complicated  runs with lots of coverage might be an exception due to pucker and pulling the design "out of register" for subsequent colors. Perhaps the "Tug 'O' War" between top and bottom is less important than a proper upper setting on those. For balance, yiu cant beat a column test, observing "thirds".

But what do I know?!? I'm a screen printer.  All I ever do with the embroidery machines is repair them and tweak them when the embroiderers can't seem to. And I've yet to see a single hired hand CONSISTENTLY turn a thumb screw the right direction upside down. I'll walk through and "hear" a cap frame driver rattling and know INSTANTLY they've turned the locking screws OUT to the limit, instead of in. "Can you not hear that!?" "You've got the screws backed out all the way again"

Grrrr....
Title: Re: bobbin tension issues
Post by: Doug B on November 22, 2016, 05:55:30 AM
  I'll add to this little debate that (at least in my experience of 30+ years in embroidery)
EVERY machine is different. Unless you are running all brand new machines in perfect
factory condition you cannot go by a gauge alone. A lot of us have machines that are
AT LEAST 10 years old and they obviously don't play by the same set of rules as their
younger counterparts. I will admit that gauges have their place and are a good starting
place but other things must be taken into consideration.
Title: Re: bobbin tension issues
Post by: mooseman on November 22, 2016, 07:23:29 AM
We have a 4 head and a single head machine.
The bobbin cases are marked so they are dedicated to that head.
Bobbins are set and tested with the drop test and while not all 4 are the same relative to each other it is not important. What is important is the bobbin tension is set to balance the top tension of the specific head.

It is a PITA but if I am unsure of a given tension I have a standard tension test, We run a 1/4 wide column about 1 inch long and check the bottom threads for the 1/3  1/3  1/3 association top to bobbin thread.
Adjustments are made to top thread tensions only, we never balance the tensions with the bobbin tension.

It is important to understand that on a multi head machine the tensions across the heads do not all have to be the same relative to each head, ONLY the bobbin & upper tensions (on each head individually) have to be in balance.

here is a simple video if you are not familiar with 1/3  1/3  1/3 bottom thread association
 https://www.youtube.com/watch?v=5jSVgs4JeVw (https://www.youtube.com/watch?v=5jSVgs4JeVw)

here is a simple video if you are not familiar with the bobbin drop tension test
https://www.youtube.com/watch?v=IWidGXYTzSI (https://www.youtube.com/watch?v=IWidGXYTzSI)

At the end of the day this embroidery thing can be a real pain as you discovered Homer but there is always a solution as the problems are always the same we have all seen over time.


mooseman

Title: Re: bobbin tension issues
Post by: mk162 on November 22, 2016, 09:03:55 AM
I am a huge gauge fan here as well.  I also use it to let me know if my top thread is out or not.  If I have perfect bottom tension and I see a ton of bobbin on the underside I know it's my top thread.  Our machine tech talks about how most shops he is in has both tensions cranked down because they have no idea that one may have been correct and adjust the wrong one.

The gauges also remove one variable for us.

Question, how do you guys measure EOM?  Fingernail?
Title: Re: bobbin tension issues
Post by: whitewater on November 22, 2016, 09:41:38 AM
What are the issues that arise with the madeira magnetic sided bobbins? we use them and i think they are so much better than the coats ones we used to use.

is there an issue I'm not aware of?

Title: Re: bobbin tension issues
Post by: ftembroidery on November 22, 2016, 01:42:20 PM
What I ran into with the Madeira magnetic sided bobbins were sloppy manufacturing issues.  Badly off-center shaft and out of round sides.  They would spin 270 degrees and then drag heavily on the inside of the bobbin case for 90 degrees.
Title: Re: bobbin tension issues
Post by: Admiral on November 22, 2016, 02:26:55 PM
What are the issues that arise with the madeira magnetic sided bobbins? we use them and i think they are so much better than the cars ones we used to use.

is there an issue I'm not aware of?

Did not run consistently at all for us.  We have new Tajima machines.  We did take out the springs for the magnetic sided bobbins.

I like the 503 paper sided Madeira with a backlash spring.  Magna Glide could be better but haven't tested, have been very happy with these ones so haven't tried them yet.  I feel like only 1-2 bobbins out of a whole box are an issue at all.
Title: Re: bobbin tension issues
Post by: Itsa Little CrOoked on November 22, 2016, 04:06:02 PM
<snip> I feel like only 1-2 bobbins out of a whole box are an issue at all. <snip>

You'll have a rounding error to zero issues with magna glide bobbins, box after box after many boxes. Along with the same tension from start to finish on each bobbin.

We had lots of issues before we switched over to them 100%.
Title: Re: bobbin tension issues
Post by: mk162 on November 22, 2016, 04:22:21 PM
Yeah, I can't think of the last bobbin we had to throw away from Magna-Glide.  I had a friend of mine come in and run our equipment once, she switched over the next day and hasn't looked back either.

It was as big of a switch as going to poly thread for us.  Much fewer problems overall.
Title: Re: bobbin tension issues
Post by: Homer on November 22, 2016, 04:55:35 PM
I just put in new rotary hooks and I need to work on my timing skills and setting the hook gap. It appears I was off a lil bit. That seemed to help somewhat. I want to use a gauge on the bobbin but my settings are too far off when I do so I guess the drop test until I learn more. Or find a different gauge? I don't know.

I have the magna glide in now and we're back jammin so all is good.. until tomorrow.  ::)

Rob, you can have my 3 boxes of madiera mag sided bobbins. I'll never use them.
Title: Re: bobbin tension issues
Post by: Admiral on November 22, 2016, 05:55:10 PM
<snip> I feel like only 1-2 bobbins out of a whole box are an issue at all. <snip>

You'll have a rounding error to zero issues with magna glide bobbins, box after box after many boxes. Along with the same tension from start to finish on each bobbin.

We had lots of issues before we switched over to them 100%.

Well it's a minor issue usually not a crazy issue where it ruins something - but yea I do get it that going from 1/144 to 0 problems would be beneficial just very marginally with how well they run for us.  Will definitely try them out at some point!  The embroidery suppliers we currently use don't supply them is all.

I'll try to get the embroiderers to track how many times we have issues with a bad bobbin on the 3 or 4 cases we have right now.
Title: Re: bobbin tension issues
Post by: Itsa Little CrOoked on November 22, 2016, 06:25:53 PM
I just put in new rotary hooks and I need to work on my timing skills and setting the hook gap. It appears I was off a lil bit. That seemed to help somewhat. I want to use a gauge on the bobbin but my settings are too far off when I do so I guess the drop test until I learn more. Or find a different gauge? I don't know.

I have the magna glide in now and we're back jammin so all is good.. until tomorrow.  ::)

Rob, you can have my 3 boxes of madiera mag sided bobbins. I'll never use them.

So it sounds like you're making progress!  I knew you would....

I was so frustrated with our machines at first. Young boys don't often grow up working with sewing machines, but more like mowers, bikes, go carts and motorcycles. I'm in the group of "mechanically fluent" instead of "wrenching dunces".... but still, these things just aren't the same as an engine misfire, or brakes squealing, or a wheel out of balance, or a carburetor with a plugged passage.

Yet they still ARE machines, and operate with a given set of known parameters...which can be understood in time. Like a bad ground or a vacuum leak, just different somehow.

I was struggling to learn how to get my plastisol transfers to register 2nd, 3rd, 4th colors etc, after passing through the dryer. FINALLY(!) The Proverbial Light Bulb has come on, and I ran a 6 color, SimPro transfer today. Each pass lined up VERY well, once I finally figured it out. I believe I was hurrying the paper through the tunnel too much on the Preparation Passes (shrinking passes) to get the papers fully, uniformly dry. I'm now shooting for 60 seconds of dwell now @266 degrees for the pre-treatment. And although that may be all WRONG for other shops, 2 passes like this, and the papers go right into my 120-ish degree hot boxes and my registration troubles are over. Each printing pass is 230 to about 240 degrees for 45 seconds. If it is raining outside, I don't know.

Jay, please keep this thread updated. (I know you will.) But I am very interested to see how this particular, odd problem ends up.

Title: Re: bobbin tension issues
Post by: mk162 on November 23, 2016, 08:42:43 AM
Well it's a minor issue usually not a crazy issue where it ruins something - but yea I do get it that going from 1/144 to 0 problems would be beneficial just very marginally with how well they run for us.  Will definitely try them out at some point!  The embroidery suppliers we currently use don't supply them is all.

I'll try to get the embroiderers to track how many times we have issues with a bad bobbin on the 3 or 4 cases we have right now.

We buy them from Fil-Tec.  Along with our backing.  They have a rip-stop type backing that is awesome.  They also make it in a super thick version that is killer was well.
Title: Re: bobbin tension issues
Post by: whitewater on November 23, 2016, 04:08:35 PM
I just put in new rotary hooks and I need to work on my timing skills and setting the hook gap. It appears I was off a lil bit. That seemed to help somewhat. I want to use a gauge on the bobbin but my settings are too far off when I do so I guess the drop test until I learn more. Or find a different gauge? I don't know.

I have the magna glide in now and we're back jammin so all is good.. until tomorrow.  ::)

Rob, you can have my 3 boxes of madiera mag sided bobbins. I'll never use them.

Now that i said i have not had issues with them, I'm waiting for the ball to drop ..LOL
Title: Re: bobbin tension issues
Post by: Homer on November 23, 2016, 04:13:57 PM
Now that i said i have not had issues with them, I'm waiting for the ball to drop ..LOL

still waiting for your balls to drop huh Rob...sounds about right.

 ;D
Title: Re: bobbin tension issues
Post by: whitewater on November 28, 2016, 10:18:23 AM
Now that i said i have not had issues with them, I'm waiting for the ball to drop ..LOL

still waiting for your balls to drop huh Rob...sounds about right.

 ;D

SURE AM! LOL