My machine was about 2.5 hours into a 4 hour a job when it stopped. No lights on the Jackpot board.
I confirmed I have 24v on the bottom of the pins for the input screw terminal.
I have no 5v when I check the power rail by the limit switch connectors.
I noticed the U5 chip is hot to the touch.
Can I replace this step-down chip and carry on making chips?
It’s unlikely to be that chip if it’s hot, it’s much more likely that something on the 5V rail is dead and browning out the supply.
I would disconnect everything from the board and try to boot it up just entirely on its own.
When you say hot to the touch do you mean noticeably warm? Too hot to hold your finger on for more than 10 seconds? Too hot to hold your finger on for 1 second? Noticeably radiating heat? Those are all quite different scenarios.
I just unplugged everything.
Still no 5v found anywhere.
Chip is too hot to put finger on for ~10 seconds with everything disconnected from board.
Can we see pictures of your full jackpot board?
Do you have a DMM available?
I got the machine to run again for a little while by back feeding 5v and GND to the gpio 12-14 rail.
It finally kicked the bucket and I now have continuity between 5v and GND.
I have a hunch that something could have shorted out, as I have been milling a bunch of aluminum recently and the control board box had a bunch of small chips in it.
I have a DMM, and I would be happy to test anything.
Thanks for anybody who has thought about this.
Vaguely recall someone else being bitten by this before. Am considering conformal coating my board, and/or mount controller on exterior of YZ plate if/when am milling lots of Aluminum, even though am using mister and vac to minimize heat and stray chips.
Yep - I had my board lose power during a job. It was because aluminum chips created a short. In my case it was solved by careful cleaning. Sorry to hear yours may be significant damage.
I put a bit longer wings on my struts to reduce ingress, added coolant with enough air assist to blow the chips generally away from the control board.
At that point, you’ve popped the board. Bummer.
It’s happened to a couple of folks that are milling aluminum.
How did you have it sealed in the beam and Jackpot enclosure?
