Ohmstruder Mod

by JBFromOZ, published

Ohmstruder Mod by JBFromOZ Nov 13, 2012

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Based on OhmEye MicroExtruder, configured to use 608 skate bearing and zenith HEC1063 corner brace along with other hardware I had at hand.


Based on OhmEye's extruder https://github.com/OhmEye/RepRap/tree/master/extruder

geared extruder and hobbed drive from www.2engineers.com

Local hardware had a different L bracket and as I had no 605's I altered this to suit 608'z and a slightly different fulcrum location. the extra plastic piece is to offset the mount hole for the L bracket to swivel on.

Many have reported reliability issues with this geared drive, ensure fully greased up, and also watch acceleration. I believe the biggest issue lies in peak acceleration retract to extruder, causing tooth failure.. as per https://www.youtube.com/watch?v=Ft2PxD-q7aU

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Ohmstruder Mod by JBFromOZ is licensed under the Creative Commons - Attribution license.

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Is there a lubricant you recommend for this motor? I assume you mean put oil into the gear-box, not the motor itself. :-)

yeah i used slick-50 one grease, a friction modified PTFE grease in mine.

where did you buy the little geared stepper? Do you have a type number for it?

Times Brilliant 42BYG48HJ50

http://www.2engineers.comhttp://www.2engineers.com they are presently showing out of stock, however hp will be back approx 26 nov or so with the stock at hand being able to be sent then. Note that this stepper has some issues with the final drive gear being brass, and not handling high acceleration. whether the stepper is useful at lower acceleration is what I will be testing

entire assembly weighs 300g