Improved MP Mini Stock Extruder Arm

by xilvar Sep 27, 2016
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can i use the stock bearing that came with the printer originally?

Unfortunately no. The reason for a different bearing is to increase the radius of the spindle strengthening the weak part radically. The chosen bearing is really cheap in any hobby store because it’s a common rc car size.

Thank you, I will be looking into buying those bearings.

Comments deleted.

Anyone know the "name" of the spring that's used here? Is it any different than the stock one? Mine went flying off somewhere and I might have to go find one at the hardware shop without much info on it.

I tried printing this 3 times, and it prints about 75% and my printer stops at the same spot all three times, and doesn't finish the print. I'm trying to print with APLA on my Select Mini v2. I'm just wondering if the file is damaged or something. I'm using Cura 3.0.4

Hm. That’s pretty odd! Other folks haven’t reported any issues and the file hasn’t changed at all. It’s a very clean file since it’s purely generated by Openscad.

Have you been able to print other files of similar Time length? If you are printing via usb you might try instead copying the gcode resultant to the Sd card and printing from there to rule out usb issues.

Also if you’re using usb be sure to disable screensaver, power saving, screen lock, etc. because most of those sleep your devices when they activate.

I'm using sd card not usb. I just recently updated to Cura 3.0.4, I'm starting to think maybe it's a Cura problem. Thanks for your help, and it's a nice part.

Thank you for this part :) very useful

Did you print this with PLA or ABS?

I've printed it in both PLA and in PETG. In my own makes the translucent white arm is PLA and the transparent natural is PETG. Both versions are very strong.

Awesome, thanks for the info. I'll be printing one soon as soon as I get some more filament.

I printed this and it is working perfectly (I posted my make). I found the bearing you specified at a local hobby store, just as you said I would :). Very nice work.

Glad it's working for you! It was a minor pain to roughly measure all the positions and iterate prints, so I'm happy that it helps out!