Hi all, sorry for this rather low level question here but I am still trying to get my head around how one calculates ideal motor/controller pairings...
I have built a gantry style router table 9'x5' out of steel. Both the X and Y are driven by 3/4" ready-rod. The system is set up to be driven by 4 steppers (2x, 1y, 1z)
I had originally bought a cheep controller and 4x Nema34 motors (878oz) off of ebay (china) to drive it. However after about 20 minutes I ended up buying a G540 as the controller from China was total garbage. I have managed to get the motors to "kinda" run but ran into some very strange issues where i could only get 3 of the motors to run at any one time without the G540 going into safe mode. I could get any combination of the 4 motors to run so long as I didn't have more than 3 plugged in at once. It would on VERY rare occasion go to lock up with 4 and even rarer would move but as soon as a load was applied to one of the axis the 540 would shutdown. it "shouldn't" have been a problem of power as all 4 drives were resistord down to 3.5amps. Anyway after much swearing and trouble shooting with the folks at Gecko I am hoping that new drives of higher quality will fix the problem.
I have a 20amp 50V power supply from Keling KL-5020 and have already drilled mounts for Nema 34 steppers.
Now onto the question: What would make a good mate for the G540 in regards to a Nema34 mount? I would like something relatively fast as at the moment it takes a good 3-4 minutes to jog the full length of the table, but I am thinking that a high torque 34 wired in parallel is going to be a little outside of the 540s amperage range...
I was looking at the following as some options from Keling:
KL34H295-43-8A
KL34H280-45-4A
KL34H280-45-8A
But to be totally honest I have no idea how big of a motor I need and I have no clue as to how one is meant to determine speed from these specs as most of the motors don't have speed graphs....
So I was hoping that someone here who knows more than I (which is probably everyone) could suggest the best motor match for my situation OR is this job simply too much for a 540?
Thanks a ton!