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3d printer - Leapfrog creatr conversion

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MetalMagus:
Noticed you said you had used resin parts. On the Voron printer forum they advise against resin parts, especially if the print chamber is going to be heated. The reason given was that the resin parts are prone to "creep" over time so you begin to see fit and tolerance issues.

Just something to bear in mind if you start having any issues that are not easily identified.

Sean

BillTodd:
Yes thanks Sean,

The extruder is very much an experiment, it was intended to be made in aluminium.

I've had experience with resin parts and heat , they do odd things  like cracking apart at modest temperatures , while at the same time being almost immune to the soldering iron!

I might investigate some higher temperature resins.

In the meantime, I have rebuilt the extruder with a number of fixes which should hopefully  stop it jamming .

BillTodd:
Well I finally have a finish print

Lots of modifications to the tadpole prototype : Better spacing for the gears (it was a little too tight) ,Captive nut instead of threading into the plastic  and machining the bearing and stator fit to reduce the amount of 'fitting' required  etc. etc.

While I was at it I increased the side of the extruder gear bearing so I can get it out without disassembling the motor .

Still no part cooling.

BillTodd:
This is what I like about resin printing...

This fan duct would be nearly impossible to make in one piece with any other method.

 

BillTodd:
Quick update.

Printer is working. This is its forth print in progress.

The extruder is working well when it works but is still being unreliable at times.


The resonance is fixed (for now) by switching off the tmc stelthchop mode, which is a pity because it's not as quiet now. I've tried to get Marlin's hybrid mode to work but it doesn't seem to want to disable stelthchop ever ???? (Expert advice welcome)

Speed is still being limited by acceleration, again marlin advice welcome!

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