3d printed test of motor mount and pulley for PM-25 spindle
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- Опубликовано: 9 сен 2024
- I had machined the bottom part of the motor, but knew it would be a while before I could find the time to machine the pulley and the upper part of the motor mount, so I just printed them in PETG. So here you see the part attached to the top of the mill in aluminum is the new lower mount, and the blue plastic is the temporary mount to test with.
I can't believe the pulley worked, and it let me validate all dimensions including the belt length. I ran it this way for about 20 minutes before the pulley started slinging off pieces of plastic. It gave me the motivation to finish making the conversion.
Came here from clough’s video. Was hoping to see your spindle upgrades. Been painting my brand new pm25 for months. Hated the white. Shit job. Chipping everywhere. Using regal red and black rustoleum. Got Dave Clements ball screws. Machine starting to look the way it oughtta with a good paint job.
You printed the pulley, and it worked? That's awesome! :)
Yes, it made me laugh. I really printed it just to validate dimensions, but I was curious. The pulley took a while to make, and seeing over 4500 rpm with the plastic pulley was motivation to get it done. Had to make rough turn the pulley on the manual lathe, then chuck it in the mill and use it like a cnc lathe to cut the pulley grooves. Then I 3d printed a spindle lock and made a bar to cut the keyway by plunging in Z on the mill. Lots of steps, but I eventually got it done.
Hey Bill, great job, can you share your design? Let me know Thanks.
I'd be happy to. I modeled it in fusion 360 and built the motor mount parts on the mill and turned the pulley on the mill in mill-turn mode using the mill like a lathe. If you plan to machine this for yourself, the Fusion files would be helpful. The 3d printed pulley wouldn't last more than a few minutes though. I was just doing it to test the dimensions and then wanted to see if it would run. Let me know if you want the files and I'll figure out how to post a link to them here.
@@billstrahan4791 I would love the Fusion360 files, for both the mount and the pulley. I want to machine the pulley the same way you did. I think you can "share" the files on the fusion site and it will give you a link to post or you can PM me if you want.
@@rosspower7514 Motor Mount: a360.co/3b2N3Q5
@@rosspower7514 Pulley: a360.co/32zU5rX
@@billstrahan4791 Thank you very much sir, I hope I can get them done correctly. I know it will go a long way to help with finish. BTW, I thought I saw somewhere that you were selling your complete pm head unit. did you? and why.