This was the origin of my contortionist comment … 
Suggest you rotate the tube so the coolant outlets are pointed up. The way you are set up can trap air in the tube. With them pointed up any air is purged out of the tube.
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That photo is not my actual laser that photo is the same laser I have from the manufacturers manual 
I probably didn’t do this one right either but there you go 3rd time lucky!
My 3D printer does this when I move the table. I think the steppers act like a mini generator.
didn’t you have the motor connector disconnected from the driver module? There should not have been any backfeeding into the controller.
Yes I had the motor disconnected from the driver module as I had just finished performing the other video.
At present all my video links have been temporarily suspended for 24 hours due to over excessive high traffic 
I wasn’t aware this thread was that popular so I’m afraid none of my video links are working at present and a few of the older ones I’ve deleted to try to help.
They should come back to life very late tonight GMT time 
Again, which connector was disconnected? It’s obvious it’s not the driver to the motor… Unless the energy is coming from the X axes movement, which is what I was trying to clarify… We both read the same line and interpreted them differently.
The motor had to be connected or she was generating power from the X axes…
Mine is operating properly and I get the same results on my Ruida… All connected…
I suspect the generated energy is going back through the power supply circuit.
Ruida/Motors on my machine connect directly to the 24V supply … I believe I measured from the 24V power supply to the 24V pin on the motor driver and there was 0 resistance. Unless this connector is removed, there is a path for it to flow. Of course there’s two generators on each machine.
This one was disconnected below to perform the test of manually moving the X-axis back and forth as per @DougL request.
Then I noticed the control panel flashing while I was performing that action which I just asked about out of curiosity if that was normal. If it’s a normal thing then it’s normal but I wouldn’t know that being a newbie.
These stepper motors act as generators of electricity when they are spun manually as would happen if you used your hands to move the X rail in the Y axis or moved the laser head in the X axis.
What is troubling here is that you were only moving the Y axis motor yet it was still backfeeding electricity to the controller BUT the Y axis motor was supposed to be disconnected from the circuit by unplugging the Y axis motor from the Y axis Stepper Motor Driver Module.
I can not find the user manual for this driver module anywhere and I’m trying to find out why it has a 24V input marked “DC18-50V Input” and a 2nd connector marked only GND/VDC. I don’t believe there is any 24VDC power going directly to the stepper motors and that 2 wire connector in the picture is from the 24V power supply and MAYBE it is supposed to be connected to the connector marked as “DC18-50V Input”.
If anyone can find this manual, with these exact connections, please point me to it.
@onthecakefront maybe you can send an email to Omtech showing that picture and showing the current power to the stepper motor driver modules is not connected to the “Input” connector?
Not a lot on this driver… it’s a pdf, remove the .txt extension… It would be nice for Discourse to be configured for pdf files…
dm542.pdf.txt (396.6 KB)
It isn’t real specific about how it’s power is wired but that area assumes it will be powered by an unfiltered power supply, which I suspect is for the “DC18-50V Input”.
I’m thinking it’s properly connected… This is section 5 of the manual, read it for yourself
that is not for this driver, it only states there’s one pair of power input pins but the one Beverley posted a picture of shows TWO pairs of power connectors and then one marked as Input is not the one connected to the power supply.
Did you read section 5 on power?
I can’t find any other manual on this driver… can you?
Yes and it says nothing about the 2 different power connectors nor nothing about why one is unmarked and the other marked with a range AND marked as “Input”. Just talks about using an unregulated power supply, the current output of that PS, about a regulated PS and the current output of that. Again, nothing of interest relative to the problem that I can see.
Heck no and that is why I asked others to see if they could find it. AND I asked to look for the dual power connectors as that seems to be what’s unique about this.
It’s worked for 6 weeks, I’d accept it as wired correctly since we have nothing else to go on that would indicate it isn’t wire correctly.
It has not worked without fault for the first 6 weeks I have had 3 issues with it so far in the short time of owning it. Which is why when I initially started this topic I asked regarding the software as the only thing I had changed in all the time of owning it was update the LightBurn software when the updates were released.
My partner initially bought it and he was contacting the vendor but he was not getting a reply, so I found a contact email in the back of the instruction manual that came with it and I contacted them. They replied asking for a video of what was happening etc they asked me to change wires, they are the ones that are apparently sending out this Y-axis motor.
A few days ago my partner received an email reply from the vendor and they have told him to do a “factory reset” on the control panel. Now I am positive I read somewhere here on another thread that you should never do a factory reset as you would lose all the settings and it basically becomes inoperable.
So I emailed who I have been contacting all this time as they haven’t once asked to look at the controller or its settings and asked the question, I was extremely specific in my enquiry. (my emails to them are in the black boxes)
I have also sent them the photo of the driver module and asked them regarding the
So I will see what they come back with on that.
The first ‘problem’ was operator error, so don’t blame that on anything other than your inexperience with the machine… This couldn’t have anything to do with how the power is supplied to the motor drivers.
2nd issue with the X axes and the third is the Y axes… Both X and Y have different drivers, so the problem moved…
I’ve fixed computers, both from both the hardware and software ends. I wouldn’t connect any of these last two as a power issue.
@DougL is probably right, if the power issue bothers you, ask them… They build these things, you’d hope that the least they could do is wire correctly.
I don’t think there’s any evidence it’s a power issue…
If you make a backup of the controller via the machines settings it should back up anything that will be an issue. You will, in all probability have to reload those settings.
I’d suggest making the ‘machine settings’ backup and doing a reset as the manufacturer advised. See if the machine runs without re-loading your configuration… Kind of doubt it, but these things have surprised me before.
Follow OMTech advise, since you are holding them responsible in the end. 
Good luck
Many thanks for your suggestion 
I enclose some photos of the Y-motor as I have had an attempt of getting it off today to see how difficult it may be to change when the replacement one comes.
They responded today there words were " the wiring shown in your picture doesn’t have any problems"
I have done that today also and unfortunately it made no difference to the current issue with the Y-axis.
As I stated, I kind of doubted it would make an difference…
I guess we’ll just have to wait for the replacement motor and keep our fingers crossed.
If you drive the motor now without the belts on, what is the behavior?
Also, is there a connector for the cable on the motor side? Or do the wires come out directly from the motor?
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