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Bondtech BMG mount for Creality CR10 Ender 3

by bytespider Sep 24, 2018
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Printed very well, but the m3 nuts have no grip and I can't seem to get it hold the motor. Is there any special trick to it or the whole grip should come from the plastic getting grinded by larger screws when screwed inside?

The nuts should be a friction fit in the nut recess.

The holes for the mounting the motor are just holes and the bolts should be long enough to go through the part and into the motor's mounting holes. the ones supplied with the BMG should be perfect.

Thanks, managed to make it work. I used it the wrong way before. The only problem is that the SunLu pla+ black broke right away. Still managed to print a new one and while I was at it, I increased the 2 diagonals width in order to expand the weight on a broader surface. Hopefully it will reduce the stress on the weaker PLA material.

Better if you use PETG instead of PLA. The stepper gets hot and it tends to deform the holder due both the weight of the stepper and its temperature

Any guess how long the bolts should be with this? Something like 4 or 5 mm?

I used 8mm, you might get away with 6mm. 4-5 is fine for mounting the motor

I tried 4mm, and it was to short. It seems like 6mm is probably about right.

Just wonder if there is any change needed in eSteps cause after I installed the BMG it's not moving enough filament through, I tried 100mm of filament via terminal and bare got 40mm

i know this is late, but i believe the esteps should be somewhere around 415 for the BMG

Yes you still need to follow the BMG installation guide. 216 i believe the esteps are. You may have to tweak to suit your set up.

Please update your description so that it states the hardware requirements.

4 M3 nuts

why do you have to use a mount?
Is it not possible to mount it the same way as the stock extruder? (on top)

The standard CR10 mount for my BMG extruder fouled with the leadscrew nut. This part hopes to rectify that issue.

By all means find your own solution.

Has anyone tried to mount this on an Ender 3 with a stepper damper? Is there enough room or do I probably need to modify the model?

If you use the dampener on the motor and use the original motor it wont fit.
The better option maybe to use the dampener between the bracket and the X axis extruder platform so that the whole assembly motor and bracket is dampened

Finally got my extruder and put this all together last night. Your bracket worked perfect and I was able to put the damper between the bracket and the frame so now my extrusions are whisper quiet. Thank you!

Great idea! Thank you!

You made 4 holes for nuts, but used only 2, as shown on thepicture... is there a specific reason ?
Thanks for the work anyway !

I was lazy when I took the photo as the machine pictured wasn't using the mount at the time.

Great !!! So... a print is on the way ;-)

Dumb question here but is there a photo by chance?

Added. You could rotate the BMG any way that suits you, but I found this orientation worked best for me.