CNC Shark Forum

Ok, I realigned the slide bearings to the back wall and now it's cutting nearly perfect.

Thanks so much for your help Thom!

Thom, I just checked the alignment of the bearing blocks to the back of the frame, it looks like that is indeed the problem. I can't get calipers in there to measure but there is around .1" gap on the left while the right is up against the back wall. That would explain it exactly. I just talked with...

Gotcha. I figured that was the best test because that’s the size dowels that I’ve seen people use for two-sided parts. I re-ran that same test(still with 1/4” holes) but turned my rpms all the way up while slowing the plunge speed down to 10ipm. Same results. I guess in MY head it wouldn’t matter wh...

Also, the mdf slats have been milled “flat” using a pocket hole program and a 3/4” end mill, 02” pass depth so I don’t use virtual Z.
I’ve had the machine for about two weeks.

Am I being too critical? The fact is I can’t machine two sided parts and I can’t cut a rectangle with 90deg corners. If I wanted to cut the parts for a simple jewelry box I couldn’t because they wouldn’t be square. Nothing would fit. Is 1/16” out of square in a 12” span acceptable? In my experience ...

I ran that test. The piece is still on the table, havent moved it.

Thom,
Is this what you mean?

Thanks for the reply Thom. The set screws that were loose are not the 6 that hold the gantry to the crossbar. It's the set screws that are on the slide rail car. Here's a pic of them: IMG_2235.jpg It's the black set screws in the aluminum piece. I have since tightened them and ran another test. No l...

When I cut a rectangle profile it does not come out square. I believe that the gantry is not square to the Y axis. This problem also showed itself when I drilled four symmetrical reference holes for a two sided part; when i went to flip the part the holes did not line up correctly. I ran a 3,4,5 squ...