Cayenne D / Chili D question,

[GraphicDisorder]

Got it, that's good.

It would be super cool if the flash "held" the press until temp was reached, you could watch
the press heat up and start indexing faster and you wouldn't have to eff with the timing at all during a run.
Seems like it would be simple enough.

This is how I thought these worked....kinda seems like the whole point, set temp, fire up the press and print.  Press speeds up for you as temp is reached more quickly- nothing under flashed, nothing over, no running over to check the flash or indexing shirts back, etc.  That's what has attracted me to temp sensing flashes.  We don't burn shirts up too often but my crew has a hard time staying on top of the flash and reducing it as we go.  I've been having them use the control panel for this as it has 1/10th of a second bumps you can make.

I get that if you preheat or start out slower with the temp sensor units and work up to speed it shouldn't be a real issue though.

The SRoque flashes have a cooling mechanism on the sensors I hear, I think it's just a little compressed air.  It sounds like that's what caused most other iterations to fail or not work 100%, heating of the sensor during print runs.

I agree, they SHOULD work like you are saying. I "assume" the manufactures don't want the press increasing or decreasing speed without a operator controlling that. I would think that could be a issue for idiots to not be expecting a press to speed up on them.

[ffokazak]

I agree, I wouldn't want my newer press ops getting used to one speed, then without any warning having a second fall off of that index speed.

[ebscreen]

If you've got a delay foot pedal it's not an issue. I honestly think all presses should operate like that, having used
both styles.

[ZooCity]

Unexpected speed up wouldn't be an issue, the PLC would not allow the press to index any faster than the set dwell.   You set, say a 5s dwell in this scenario and the press fires up.  Maybe the dwell is actually 10s as the platens warm and the flash needs that much time to hit temp on the substrate.  Once it's there it stays at the 5s dwell until you drop it. 

So it wouldn't speed up on you without warning but it would slow down on you without warning should your platens cool or the op walk away from the job, etc. 

What's a delay foot pedal?  It pauses the machine when depressed?

[ebscreen]

What's a delay foot pedal?  It pauses the machine when depressed?

Correct. And correct about the dwell time as well. We typically run without any dwell and just use the pedal.
Helps for those oh chit moments.

[GraphicDisorder]

My guys wont use the pedal, but he sure will smash the estop when he loads a garment wrong.  I stopped that on day 1 of him being hired. He said that's how he's done it in all shops he's worked at. 

[ZooCity]

kinda off track but I'm getting feedback that my crew would like a smash/skip button on our next press, anyone like those?  I'm into the idea of just hitting the button and printing on.

[ebscreen]

My guys wont use the pedal, but he sure will smash the estop when he loads a garment wrong.  I stopped that on day 1 of him being hired. He said that's how he's done it in all shops he's worked at.

I've heard or people doing that before. Can _not_ be good for your machine. Where is this shop that teaches this?

Does the M&R pedal delay the press or skip a shirt?

kinda off track but I'm getting feedback that my crew would like a smash/skip button on our next press, anyone like those?  I'm into the idea of just hitting the button and printing on.

I always liked the idea of those and have them ordered on the new press. We'll see. I could see the press indexing quickly
enough that all you have time to do is keep hitting the skip button though. That's why I like the pedal. You can regain your composure.

[GraphicDisorder]

My guys wont use the pedal, but he sure will smash the estop when he loads a garment wrong.  I stopped that on day 1 of him being hired. He said that's how he's done it in all shops he's worked at.

I've heard or people doing that before. Can _not_ be good for your machine. Where is this shop that teaches this?

Does the M&R pedal delay the press or skip a shirt?

Hell no it can't be good for it. So much force that thing is using when indexing. I told him it was a firing offense if I see it again. I also told everyone to report if he does so far so good. He worked for a shop in Florida, id have to dig up his resume to see the name but I told him regardless how he did it there that's wrong and wont fly here.

I believe (going from memory), that the pedal can be set to manually print (1 hit = prints next shirt) OR set to skip a shirt.  Id have to double check that.  But pretty sure thats the case.  I always thought they were a decent idea but Shelly nor my new operator will use them.

[ffokazak]

So we set the Cayenne to 230 degrees, and have been playing with the timers on the Challenger.

Its almost right...

The problem I'm having is once it reaches its 230 degrees, it is turning off the lamps which is great, but the temperature still climbs and the flash will not fire again until the temps fall below the 230 degrees. This is problematic because if the press is indexing at say 3 seconds, there is a period where the shirt is not being flashed.

Its almost like the temp sensor has a delay...

I guess the question is how quickly once your new un-flashed shirt is under the Cayenne, does it adjust to the new shirts temperature? If it was instantaneous as soon as the cold shirt was under there, there temp sensor  would read that it is 140 degrees, and fire the bulbs.  Whats happening is the flash is slow to register this. The "cold" shirt comes under the flash, and the flash is still at 240 ish degrees....

[ebscreen]

What happens if you:

Start flash on test pallet/shirt
Immediately once/before temp is reached half index the pallets

Does the temp readout drop immediately and fully to ambient or continue to climb?

[ffokazak]

It would continue to climb, for a second or two, then start falling.

[ffokazak]

Its almost like it is slow to react to temp changes...

Just wondering what other Cayenne D users are seeing.

[Lizard]

You really can't run you flashes to turn off at a set temp and get a consistent flash.  We set temp at around 350 and never change it.  But we do manage our temp with index time and flash dwell.  Index time is important cause if you run with no index and skip a pallet your flash time changed for that shirt.  We print a lot of tri blend and thin fabric so that's when we use the dwell.  Usually run at 60 to 75 % on a long index.  You have to dial the time in but the flash temp will continue to climb after the bulbs turn off.  The biggest thing is run the index at a comfortable pace and keep the press moving for consistent flash temps.

[ebscreen]

Doesn't that essentially negate the whole purpose of the thermostat then?

Not trying to start an argument, I really like the idea of temp control flash, I just wonder
how effective it is in the real world.