I recently started having a problems with my homebuilt CNC and a Blackbox X32 controller. When I start the job it immediately pauses. After the resume is enabled it stops and a "GARBL error" window pops up. Error no.9 shows in the window and everything halts including the water pump that is switched by the controller. VFD also shuts off. The machine homes when powered up and asked to home.and all the limit switches work. I have individually checked the wiring an all is good. In troubleshooting tab all the limit switches show open and show triggered when they ae manually switched. It has been running flawlessly for quite a while now (over a year since I had issues). I am currently running out of ideas as to the issue. I need is as I plan on making come Christmas presents. I cannot use my small CNC since the 1 project will not fit. Please help.
funny, we had one like this last week and I think it is the same thing. Check your retract setting in your CAM, it is probably trying to lift Z too high, this depending on how thick your material is, how long the bit is, and how long the Z travel is. I have done jobs with thick materials and long bits where I could only lift 0.02" for retracts, had to apply considerable brain to the CAM settings to get that working (-:
did it actually hit the switch, or was it a false (did not hit switch but controller saw fake switch hit signal coming off EMI) trigger? If it did not hit the switch, VFDs are notorious (if not correctly installed) sources of extreme levels of electromagnetic interference: docs:blackbox-x32:faq-emi [OpenBuilds Documentation]
Thanks for the reply. I do not know exactly why it stops. I assumed it was a limit problem. (it acts the same way). As it is trying to cut the limit switches are no where near the limits. (X is 220mm away, Y is 300mm away and z is at least 70-80 mm away). As for the VFD it is powered up with the IOT relay. I just use to power up (VFD and cooling pump) and have to manually start the spindle for a warm up before cutting. This just started recently after not being used for a while. Is there a way of troubleshooting as to why it stopped or is there a way of not using the limits at all after homing? I am baffled.
Sounds like the VFD spits out EMI during cutting. Probably badly earthed spindle body, badly earthed VFD itself (PE screw not attached) or using 3 core unshielded cable for the 400hz 3 phase run between VFD and Spindle (Should be shielded, earthed at VFD end, VFD cable) Make sure 3-phase high frequency cable is well spaced away from any other wiring etc Have a read through docs:blackbox-x32:faq-emi [OpenBuilds Documentation] for more tips
I figured it out. My project 0,0 was 1MM out of the maximum range of the machine. All I had to do is move my Y0 2 mm up and now it all works ok. Thanks for the help.
