*** Read all of this text before you start to do anything. You may need to read it a couple of times to let it sink in a bit. ***
It sounds like you haven't got the limits set right for your table movements and your HIGH LOW pulse settings may be wrong, As marco said. I found this to be the hardest thing to set with the DSP as there are so many ways to do it. Also the Y axis connections on my board were marked wrong. (hand written).
This may be fixed by now though.
Do this.
"Read" your settings so the DSP loads your settings into the software. This should be done every time you want to change your settings when first starting up.
Check if your table is set to move to it's correct home position in the software. This is critical! Otherwise the laser will go in the wrong direction and then you will set your motors to go in the wrong direction as well to adjust for it. There is a drop down box in the top menu where you also set the default home position as well as one in the "setup" menu. Mine is "upper left" but yours may be different. You may need to swap wires on your motors so every thing moves in the right direction. I had to with my set up but don't do it to yours until you definitely know the laser head is going in the wrong direction.
Save your settings (export) to a backup file where you like. I save all my backups to a separate disk other than the system disk just in case there is a hard drive crash and drive C gets corrupted.
Move the laser head to the center of the table and then set a very low speed for cutting like 5mm/sec.
Take the cover off your DSP so you can see the LEDs light up when you trip a limit switch.
Do this with the power off as you don't want to short anything. (If your software is set to HIGH then all the LEDs will be off because the DSP will be looking for a 5V signal and when the limit switch is pressed it will send 5V to the DSP lighting up the LED for that axis.)
Disconnect your laser power supply as we only want to test for the limits without cutting.
Draw a square about 20mm in size and then process for cutting at 5mm/s.
When you press START the job should run and while the head is moving press the limit switch that the laser head should hit if moving in that direction. Make the square bigger if it doesn't give you enough time to check.
This is how the table direction should be set up looking from the front to the back. You might have top right start or bottom left start etc but the table directions will still be the same.
+Y
-X +X
-Y
i.e.
if the head is moving right then you manually press the right limit switch and look at the LEDs on the DSP and see which one is lighting up. If you are moving in the +X direction and the -X limit lights up then you have your wires crossed. If the LEDs are on then you may need to change how the system works by choosing "LOW" pulse instead of "HIGH" pulse. If the LOW pulse is set then the system is looking for no voltage on the limits so if the limit switch has 5V across them all the time, LEDS are on, then it will be looking for the voltage to drop out to zero for the limit to activate. Like I said, So many ways to set them up.!!
Also I had to set my software to "LOW" pulse for my set up to work and change all my limits to be NC or LEDS on all the time. I couldn't get the laser to fire properly and the limits to work together if set to "High". This will swap all your setting around and you will have to adjust for all of them. Laser power supply wiring included.
This might also have a bearing on how your laser fires as well by using the LOW pulse function. (found on the main set up page near the bottom)
I really do hope this helps you get it sorted out. I feel your frustration and I think most of us here have been in the same boat as we're not engineers but just a bunch of people trying something new.
I hope I have all the information right and it is clear enough to read as I'm not at the laser and can't check it but if someone here can check, I will feel a bit better about the info.
Rich.
P.S. I really admire the people who's second language is English and take on all this stuff. I have a hard time with English as a first language.
