I am attempting to cut out a small hex shape to go with a board game and it is not cutting to design. Every time it goes down in z it moves over .05" on the x axis So instead of a strait cut, it is a star step down in the x axis. The design was created in V-carve Desktop 10.0 and the gcode simulates exactly like I expect it to be. (small file only 2000 lines). Any idea what might be going on? I am new to this forum, so not sure if I can attach files.
It’s probably backlash — check the machine mechanically, esp. the pulley set screws:
- Pulley set screws: http://docs.carbide3d.com/shapeoko-faq/shapeoko-3-how-to-check-the-pulley-set-screws/ — be sure to check all axes/pulleys including Z.
- V wheels / eccentric nuts: http://docs.carbide3d.com/support/tensioning-eccentrics
- Belt tension — the Z-axis should be guitar string tight (but careful not to bend the motor shaft): http://docs.carbide3d.com/assembly/shapeoko/xxl/step-5-belting/ on deep cuts it may help to remove one spring from the Z-axis temporarily, esp. if one hasn’t added a spoilboard on top of the wasteboard — it also helps to install the router as low as possible (installing the Makita adapter upside down will help). Some folks have found it helps to remove bolts which won’t stay tensioned (M4 Z-axis tension bolt, various V wheels with eccentric nuts), apply a thin bead of threadlock along the length of the threads, then reinstalling. See the video at: https://www.youtube.com/watch?v=_lIIb_PdziA Note that the X-axis motor is held in place on standoffs and if those bolts are loose this can cause belt tension issues.
It may help to add geometry to cut as a pocket, not a slot, and to add a roughing clearance and make a finishing pass as well: Adding geometry to cut as a pocket with a finishing pass
Thanks for the tips. Went to check eccentric nuts and realized with the .063 bit that I was falling off the z axis near the bottom. Need to add a spoil board I guess.
Maybe I have had one too many beers in the shop while trying to make a deadline this evening, but you need a Carbide3D superhero cape @WillAdams. You have saved a countless number of a#%es with your quick responses and spot on guesses at the root of problems with usually limited information! Thanks!
My pleasure! Glad to be able to help out! It’s gratifying when I get things right (I’m afraid I don’t always, but no one of us is perfect).
We understand that the machines are usually used by hobbyists, or folks when they’re not working a 9–5, so we do our best to answer support e-mails after hours and on the weekends and holidays.