All axis drivers are failing to power properly, I have flashin green lights on all three and a simultaneous flasing red light on my Z driver. Everything was fine when I powered down after use, now I have a problem at powerup, have tried restarting, no change, have disconnected individual drives, no change, asvthe green light pulse, so too does the fan on the Z drive, I am not technical but suspect a lack of sufficient power at start up? Or a software issue?
Assuming it’s that machine, then the 24 V supply has probably failed.
They seem to be under-specified for their task and fail far more often than you’d expect. If it’s under warranty, then you can likely get a replacement.
If it’s out of warranty, then get a replacement with a higher output current rating, although fitting the new supply in the space left by the old one may be difficult.
It’s likely a ventilated aluminum box in the electronics bay, similar to the one I just shoehorned into my machine:
Worst case, they’re available from Amazon, but look for a seller with a pronounceable name that doesn’t also carry inflatable holiday decorations and beach attire. 
In general, abrupt failures are due to electrical or mechanical issues: if you didn’t change anything and something changed, then it’s not a software problem.
Hi Ed,
Many thanks for the prompt reply, it’s a bad time of the year for problems! I have 24v power lighting up the pointer on the laser head, so the unit has not completly failed. Is it possible my Leetro controller is not initiating the drivers? I have slow flashing green lights on each and the little fan on the Z driver is quivering but not rotating. I haven’t changed anything recently in terms of software, but anything I read about the Leetro and Lasercut 5.4 is not great, I have learned to live with crashes and blips over the last 9 years!!
Thanks again,
Philip
I should have clarified I use a 2017 Gweike 1390 with a leetro controller, it’s been “quirky” over the years but I am self taught and learned the hard way to get it to do what I want, uo until now!
That would be unusual; the one in my machine is an ordinary 5 V module.
Oddly, OMTech installed a dual-output 24 / 5 V power supply with the 5 V output used only for the red-dot pointer. They could have used a 5 V output from the Ruida controller, but … who knows?
Assuming the pointer runs from the 24 V supply, then it will probably light up just about the same way from 20 V, 15 V, maybe even 10 V. However, the stepper drivers will choke on low voltages.
A cheap multimeter will let you measure the actual output voltage to see what’s going on.
It’s possible, but if the stepper drivers are the typical black bricks, they use DIP switches for configuration.
Thanks again Ed, I will have the 24v power supply checked, it would be great if that is the issue rather than going down the route of changing controller, I have no technical expertise myself, just trying to hit on an answer by reading whatever related posts on the web, thanka again for your time and responses, I will update as soon as I can👍
Feel free to reach out to us at Techsupport@omtech.com. and one of our Tech Supports Technicians can assist you with your issue.