CNC Project Day 10

Well, I have successfully run the machine enough to now know what is wrong with it. Still getting some chatter out of the Y axis --even after 2 days of tweaking and adjusting. As we stand now, I am contemplating a total tear-down and rebuild. It is looking more and more like a fixed gantry and a sliding table is the way to go. I think I may sleep on this one a bit before I go after it with a cut-off wheel but.... yeah...

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Education

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[ntjbjhq]

That sucks man! So sorry you are having all these problems, but man, you are helping out alot of people in the process! When/If I ever get the stones to try a build like this I'll certainly be keeping your mistakes in the front of my process, as will many I'm sure that may never even comment.

Thanks for the truth, painful as it may be, and I wish you good luck on revision .5 ;)

[koz]

what I "was" about to suggest.. obviously ;)

[koz]

@tleneel that's exactly what I what about to suggest.

adding a counterweight below will reduce the circular forces from the lower thread pivoting at the bearings, causing the 'herky-jerky-ness' ;)

but it will naturally be harder for the motors to push and pull it around.

[tleneel]

Sliding the table sounds a bit better, less mass, quicker acceleration. But, could you fix your gantry problem by adding counter weights underneath? To create an equilibrium (since you have an offset weight problem), I realize it would be heavy, but it might reduce the vibrations.

[catsam305]

hi when i made my cnc mill i had the same problems i though it was because i made my rails but i think its the bearing blocks i had to re make my mill when i found some IKO rails from ebay and that fixed all my problems here is my web page w w w .perryman.f2s.com/projects/cnc­%20mill/cnc%20mill%201.html

[sk8rboy1255555]

sorry to hear that! looks very nice tho =/

I could tell how your day went by the ding at the end.. It was pretty shity lol