New PM-728V-T Mill

@rwm Sure, I checked that after reading your post, and I don't notice any symptoms that you reported. Assuming you mean the quill feed, it's very smooth. I don't feel any tooth engagement at all.
 
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AlanB said:
I'm looking forward to the PM-728 CNC hardware kit. I for one would not want any particular electronics package included, there are too many choices in motors, electronics and software. I've already collected most of that but a bolt-in hardware kit would really reduce the risk and effort of the mechanics. It's July now so hopefully we're getting close on this kit.
Click to expand...
Previously listed as end of July, now listed as "ETA Sept/Oct 2020." Hopefully the manual will be posted earlier, to get an idea of what is involved.
 
I Scored big ($90)
Recycle place had two of these frames. I got one, missed out on the other.
Heavy 2" tubing (224lbs). Almost a match of the PM gray. Now I need to plan the pan & enclosure.

frame.jpg
 
Have been working on it. Have the Home switches installed. Printed a mount for the Z that filled the void from the Z crank.
Tried to KISS. The switch has a long arm so it ended up with backoff more than it should be but will work.

z switch.jpg


Printed a cover for the X switch

x switch.jpg


Mounted the Y to a piece of angle. Might need to print one to match the others :)
Y switch.jpg


Glad I used a board from CNC4PC to connect the Clearpath servos to the Acorn. The Z servo has an issue with no holding power when not enabled (the head will drop when turned off or disabled). The board has a setting for hardware or software enable. If software is used the head can drop when 'reset'. Switched to the hardware setting and seemed to solve the issue.

 
Thanks for posting pics. I'm following the thread very closely since I'm thinking about buying one of these.

If I do I will learn how to run it manually and I would like to do a CNC conversion in the future so this is all very interesting!
 
Been sidetracked but working on an enclosure of sorts. Mostly to keep chips in. Maybe some mist, not planning on flood but we shall see.
KISS, used 80-20 extrusion for top and bottom rails for both sides and front doors. I have plenty of room left and right so the doors just slide out. The Sides can slide out also to gain access when needed.
1/4" polycarbonate for front and sides. Corrugated plastic in the back but thinking polycarbonate for that also.
enclosure.jpg
 
That looks great. Excellent idea to use 80-20. Why is it called that anyway?
Robert
 
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