New to this CNC word. I’ve been playing around with it for a few months now and make small plaques for my guys at work. I am currently cutting an image when my CNC machine seems to switch positions in the middle of the cut for the same image. I’ve restarted my Computer… re-selected the image and tried to re-cut it but it always switches position half way… pls ease help.
Usually problems such as you describe are due to a slipping belt or loose pulley set screw: http://docs.carbide3d.com/shapeoko-faq/shapeoko-3-how-to-check-the-pulley-set-screws/
It’s best to work up to long cuts, testing the machine functionality in stages — even then, never leave it running unattended.
To figure out whether the problem is at machine level (e.g. belts/pully as William mentionned) or at G-code level, I suggest you try and visualize the G-code you ran. There are plenty of G-code viewers; for a quick visual check I use this online one:
just click in the G-code text window, Ctrl+A and delete, then paste the G-code from your file, and click “Simulate”
If you see the same shifted feature, the problem is in the G-code, else it is something happening during the job on the machine itself.
Thank you for the link! the problem is in the Gcode how do i fix it?
Thank you for the suggestion. The pulley all seem to be tight. Thanks
Do you have the design file from which this faulty G-code was generated ? I guess so from your description in your first post where you mentionned you “re-selected the image” ? The problem is most likely there, so probably the design file itself should be fixed (i.e. it is very unlikely that the g-code post-processor itself would have introduced this shifted feature)
If you cannot find the issue, maybe share the source design file here.
Hey Julien I figured it out. I reset the program and deleted all the tool parths and re-selected them. Thank you for assisting and showing me the link for Gcodes.