Having inconsistent results when cutting multiple cavities. If I’m cutting 2, 3, or even 4 cavities at once the first is usually correct but after that the remaining may be off by 3 to 5mm. When this happens the affected cuts aren’t deep enough never too deep. After the cut as I return to zero the tip of the bit lands higher than previously set before the cut. I’ve disassembled the Z carriage expecting to find a sloppy backlash nut but they both seem fine. My ramp and plunge feedrates are always between 400 and 600 mm/min.
Any thoughts…?
Sounds like lost steps due to fast plunge or too great depth per pass.
My DOC is never more than 2mm with a feedrate of 1600 to 1800mm.
This just started happening this month and now occurs every time i run the machine.
Nothing has changed re feeds and speeds.
In that case check if the linear blocks/rails need to be lubricated:
https://my.carbide3d.com/docs/maintenance/
and see if the tool is still sharp/in good condition.
It was doing something very similar not quite a year ago before I learned you can insert a hex wrench into the holes in the backplate to tighten the leadscrew. When I started paying attention to that the issue went away. Knowing those have been consistently tight is why I suspected either the leadscrew or backlash nut had worn. They both seem fine…
If the leadscrew nut is worn it should be possible to replace it.
Might want to upgrade to an HDZ.
Thanks, I’ll lube the bearing carriages.
Does the leadscrew jump in the leadscrew nut when the bearings aren’t moving freely?
Also, are the leadscrew and backlash nuts available for purchase?
Check in with support@carbide3d.com for the specifics of how this would be handled now.
1 Like
Is there a specific procedure during re assembly to get the spring tension correct?
Maybe a certain distance the leadscrew nut and backlash nut should be from one another…?
This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.