Hello everyone. Now that I have my machine put together and the waste board complete, I set out to tune the machine. I checked both X and Y distance traveled and ensured Z was perpendicular to the waste board (though I have not trammed the waste board or flattened it yet).
After much testing, I found X travel to be off by 1/32 over 30" and Y to be off by 1/64 over 30". So I adjusted the steps per rev a little and dialed in the machine. Now there is no perceptible difference between the distance traveled and the distance commanded to travel.
Happy to provide additional details on the process and the formula for correcting if anyone is interested.
I’ve provided some pictures of my setup if anyone wants to check their machine.
X @ zero
X before adjusting (no pictures of the dialed in final product)
Y After Adjusting
While checking the Z carriage, I found it to be tilted 0.0254mm forward over 40mm (0.0006125/mm) and tilted right 0.127mm over 40mm (0.003175/mm). I tried for about an hour to correct the left/right tilt but was not able to get rid of it. I seems when I tighten the screws, the z-carriage returned to it’s position each time, despite my best efforts. Though the error is perceptible, it is very minor and should not cause a problem. But, we will know for sure when I flatten the waste board and check for ridges.
During my testing, I noticed no perceptible backlash in any direction, which was a welcome surprise (though expected given the screw drive).
All in all, the machine was nearly perfect out of the box, and that is light years ahead of my X-Carve. A little tweaking and now it is dialed in. I wish I could get the left/right tilt out, but I’m going to live with it for now.
I will do some cutting tests next to make sure I’m getting finished results with the same level of accuracy.
I’m curious if anyone else has tested their machine and are seeing similar results?