Don’t use H on the lps. I advised you to remove the wire going to the H input of the lps. I don’t know where it goes on yours, but it’s not the correct lps wiring for a standard Ruida.
The H input is not used.
L on the lps is laser enable wired to L-On1 of CN5-2 of the Ruida.
Jack, I am confused even more now… You refer to “H” and “L”
I am trying to understand what you are referring toI sent a picture of my power supply… I do. not have an “H” nor an “L”. are you referring to the ACTIVE HIGH AND ACTIVE LOW terminals for “switch laser control”???/??? that is why I included a picture of my power supply terminals
The lps has two laser enable inputs. The one you use depends on what controller or how it’s configured.
The inputs are L (TL) and H (TH). H input is the inverted L. You only use one of the two.
The default use with a Ruida, which goes low to enable the laser, is the L input.
Make sense?
I am sorry but somehow I do not think you should be working on this machine
Give him time… Nobody knows these from genetics, you have to learn.
As long as he understands what’s going on, he’ll do OK.
Thanks Jack, you are correct and with your help I have learned a ton about how lasers work and also the cnc control of the movement on these machines. I now have it wired like you told me. am I correct in the idea that the ruida controller basically provides a ground for the wires coming from the laser power supply thereby allowing the laser to fire? am I also correct that the ruida controller reads the lid switch and the water protect to see if they connect to ground in the controller so that the laser is allowed to fire?
Pretty much correct, the pwm control works on positive logic, so high is on or enabled.
Good luck – Have fun
I am now stumped. with the plug with the controller wires in it, unplugged from the lps , I push test button on lps… laser fires. plug this back in, close lid switch, water on, push pulse and get nothing. here are the screenshots of my settings…
This is correct.. If you unplug the control signals you can test fire the laser from the lps.
If the Ruida doesn’t have an error, then it doesn’t know there’s an issue.
Did you wire the lps up like I and the manual suggests?
Might want to check what power and pulse width time the controller is set. You have to do this from the machines console.
Hi Jack
I have the laser set to manual and 20ms
nothing fires with the pulse button
can I test voltage output of the ruida on the pwm terminal and the ON terminal with voltmeter when I press the pulse to see if there is the correct signal coming out? are the reading going to be AC or DC
Did you ensure you have power set high enough to reliably lase?
Technically you can, but with a 20mS pulse, you won’t see much of anything. Make the pulse much longer, giving the meter time to settle at a value.
These are all DC.
If L-On1 on the Ruida doesn’t change states when you pulse it, then it won’t lase.
Might want to unplug the lps signal lines and see if it responds without the lps connected. No need to power up the lps.
Might want to change the duration of the pulse to continuous. I can’t make heads or tails out of your description. With such a short pulse, I’m not sure what you’re reading.
further testing
I changed settings to continuous
I get 4.9 volts at L-ON1 and it drops to .2 when pulse is pressed
I get 0 volts at LPWM and it goes to 5.1 when pulse is pressed
what should I check next
Sounds like the controller is working.
Did you unplug the lps signal connector and try the test button?
some final readings
testing on the terminals of the lps
with lid switch pressed (lid closed)
water protection on, water flowing
I have 0 volts on the “IN” terminal and that goes to 4.9 volts with pulse pressed on console
I have 4.6 volts at the “TL” terminal and that goes to .26 volts when pulse is pressed
no firing of the laster tube on any of this.
if I remove the wire from the “IN” terminal I can fire the laser with the test button on the lps
does it sound like a bad lps??
The signals from the Ruida to the lps are ok, so I’d think the lps would be bad.
I ordered one
I will report back when it gets here
thanks loads and God bless
Well, I said I would report back with the results of installing a new laser power supply. Came today and I installed it…SAME AS BEFORE… WHAT THE HECK AM I MISSING
Is the water protect of the laser psu tied to gnd as well? If not, mine would not fire without the water protect of the psu being tied to gnd. (but that should be in the manual for your new psu)
