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Question CW2: did recent STL update fix the gears ability to grip flexible filament?

M

macmccaskie

Member
I'm hoping the latest update to CW2 on github will fix my problem(?). Does anyone know what was changed?
--> My copy of CW2 can't get a good grip on TPU. I think the gears are not pinching the TPU enough and slip.<--
Nozzle 0.40, speed 20 mm/sec, slicer S3D
I was re-printing a part I'd done recently, but it wasn't getting much filament through the nozzle.
I used the same slicer profile as the first time, same tip diameter, same filament and dehydrated it, etc.
I also cleaned the gears with IPA, thinking grease may have gotten on them.

TIA
 
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Hi, usually there is opposite problem with TPU, that they squish it :)
Take a look at these videos on how to adjust anti-squish thingamajig and idler tension: https://www.youtube.com/@dr.davesworkshop3585/videos it may help you with both cases, not gripping or gripping too much.

There were fixes for internal features of some parts (not manifold I think?), thicker latch, I don't recall from top of my head now.
 
Sanity Agathion said:
Hi, usually there is opposite problem with TPU, that they squish it :)
Take a look at these videos on how to adjust anti-squish thingamajig and idler tension: https://www.youtube.com/@dr.davesworkshop3585/videos it may help you with both cases, not gripping or gripping too much.

There were fixes for internal features of some parts (not manifold I think?), thicker latch, I don't recall from top of my head now.
Click to expand...
Thanks, discovered I was wrong and more squish is bad, less squish is good. Got it working and thanks for your help.
 
Sanity Agathion said:
Hi, usually there is opposite problem with TPU, that they squish it :)
Take a look at these videos on how to adjust anti-squish thingamajig and idler tension: https://www.youtube.com/@dr.davesworkshop3585/videos it may help you with both cases, not gripping or gripping too much.

There were fixes for internal features of some parts (not manifold I think?), thicker latch, I don't recall from top of my head now.
Click to expand...
Is there any place where it's written down what was changed? I want to find out if it's worth rebuilding my Clockwork 2 extruder, and if I would have to redo my calibrations, or if it's more fixing some issues that might not affect me.
 
There might be, but I didn't find it and is why I asked.
Just my opinion, but I've found documentation is a very expensive part of a project. When the user base is contained or tight knit and tribal knowledge is freely available it doesn't matter much.
On the other hand having a ready source of info can be valuable to the newly initiated, but only if said newby can find and most importantly - understand it.
 
Main goal was to bring CW2 and SB to mainline printes as stock option. That includes modifying build manuals to not have Afterburner assembly anymore but point to SB manual for assembly, remove Afterburner STLs from repositories, update X carriages to CW2 version, and add all options to SB repository. SB Body has had some internal geometry changes to prevent light bleeding, and CW2 has thiccer latch because quite a few people had their latch broken. That's what I remember. I am not sure there is specific list of release notes, would be nice though. I asked on Discord.
 
I think the preload screw stop was adjusted as well. My CW2 has never had an issue feeding TPU.
 
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