Machine: K40 - Upgraded to larger machine
Board: C3D Mini
Firmware: Smoothie with Cluster Firmware and GRBL-LPC
Problem/ Question: I have had this machine up and running for awhile. I’ve started to dabble in photo images and occasionally I get a disconnect in Smoothie or an Alarm 3 in GRBL-LPC. The job would just stop mid run. I can do a dry run without the laser enabled and everything is fine. If I turn on the laser, it will run for a bit and then stop (Sometimes it completes). Research led me to believe I am having brownout issues of sorts. Here’s what I’ve done so far.
I have upgraded to a dedicated power supply for the board. (First thing I did when I bought the board)
The board is mounted with nylon standoffs onto a acrylic backer.
Upgraded 6’ high quality USB cable with ferrules on each end. (Can’t go shorter due to laptop position)
Powered USB 3.0 Hub
Power save and USB power save all disabled on the laptop
My last change this week was to get a UPS for the board. The 24v PSU is the only thing plugged in. The UPS. The UPS and the accessories are all on the same house circuit (same wall plug).
Last night, a new issue came up. The machine continued to run, however the laser stopped firing. I stopped the job and tried to manually do a test fire with the button (not on LPSU). Nothing happened. I turned off and on the LPSU to try again. Nothing. I went downstairs to grab my multimeter to check continuity between my laser enable button and door interlock. Before I did that, I tried again and it fired from the test button. I was able to finish my job (not a photo), but this had me perplexed. I didn’t check the wires cause I didn’t want to jinx it.
Is there anything else I can do for the brownout issue? I’m not sure it is fixed yet as I haven’t tried a photo again.
Do I need to ground the C3D mini board to the chassis or something since my power is now going through a UPS? I replaced the stock K40 blue wire harness with a new one that goes over to the LPSU. This already has a ground to it. Could this be the cause of the no fire issue?
This is really perplexing.
Thanks for the help.