After a long time searching the 'net, reading around & letting the ideas sit, I came out with a new, hopefully cleaner, system. I chose a CNC4PC C11G breakout board (which seems popular and has a few very useful bells and whistles), a CNC4PC C16 optical limit switch board (and switches) and a CNC4PC C3 pulse generator, to be used as a spindle tachometer/index - I'd like to use the rigid tapping feature someday.
By the way I tried updating a long-dead thread I started over a year ago (ok maybe 2 years ago), but since it wasn't in the proper forum, nobody seemed to even look at it. Sorry for double-posting, although this post is beefier than the other one.
I followed Hoss's and Keling's adventures in CNCing, and opted for 570 oz-in 50V steppers for x, y and Z axis. They're 50V/5A motors and the G540 wouldn't quite do, so 3 G203V are in instead.
I don't know which power supply to get, though (input gladly appreciated): KL-5020: 50V/20A (overkill, higher cost but room left for a 4th axis), or the KL-600-48: 48V/12.5A (lower cost, but 3X5A steppers or 4X5A if I get there might be asking too much for this unit).
I definitely want forward/reverse controlled from Mach3 - safely - so I already bought an used KBCC-125R, which has a 3/4hp resistor on it, I'd have to get a 1HP resistor to fit the 1HP motor on the GO704 (3/4HP for this unit is 0.015 ohm). I'll also need a few more thingies, like a small (1/2A) 12V power supply (for C11G's variable voltage output, used to control the speed on the KBCC-125R), a small 5V power supply in the 2-3A range (powering the C11G, C3 and C16 boards), a relay (I need 2 mechanical relays to control the 3 "directions": FWD, REV and BRAKE). The C11G's solid-state relay is not useable in DC circuits, so an external relay is needed. Of course, I'll need an emergency stop (already got 2 of these) and other things.
Since the GO704's motor doesn't show external leads to the field coil, I wonder if the KBCC-125R would work correctly (still has some reading to do) in "open-loop": Obviously no external field coil connection, I don't have an external tach connected to the KBCC either, although I'll have an electronic tach (CNC4PC C3 board) connected to the computer through the C11 board. I'll look at threadmill motors on fleebay just in case my motors pours the magic smoke out
I just read that I could/should also add the variable signal I send to P2 over to F- also, any comments?)
Below is the circuit I planned; I dunno if I could use pin 1 (as I won't use the solid-state relay), that'd let 2 outputs available for future use (e.g: 4th axis). Please let me know if I'm on the right track, or headed straight into a wall.
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Thanks for the help.
By the way I tried updating a long-dead thread I started over a year ago (ok maybe 2 years ago), but since it wasn't in the proper forum, nobody seemed to even look at it. Sorry for double-posting, although this post is beefier than the other one.
I followed Hoss's and Keling's adventures in CNCing, and opted for 570 oz-in 50V steppers for x, y and Z axis. They're 50V/5A motors and the G540 wouldn't quite do, so 3 G203V are in instead.
I don't know which power supply to get, though (input gladly appreciated): KL-5020: 50V/20A (overkill, higher cost but room left for a 4th axis), or the KL-600-48: 48V/12.5A (lower cost, but 3X5A steppers or 4X5A if I get there might be asking too much for this unit).
I definitely want forward/reverse controlled from Mach3 - safely - so I already bought an used KBCC-125R, which has a 3/4hp resistor on it, I'd have to get a 1HP resistor to fit the 1HP motor on the GO704 (3/4HP for this unit is 0.015 ohm). I'll also need a few more thingies, like a small (1/2A) 12V power supply (for C11G's variable voltage output, used to control the speed on the KBCC-125R), a small 5V power supply in the 2-3A range (powering the C11G, C3 and C16 boards), a relay (I need 2 mechanical relays to control the 3 "directions": FWD, REV and BRAKE). The C11G's solid-state relay is not useable in DC circuits, so an external relay is needed. Of course, I'll need an emergency stop (already got 2 of these) and other things.
Since the GO704's motor doesn't show external leads to the field coil, I wonder if the KBCC-125R would work correctly (still has some reading to do) in "open-loop": Obviously no external field coil connection, I don't have an external tach connected to the KBCC either, although I'll have an electronic tach (CNC4PC C3 board) connected to the computer through the C11 board. I'll look at threadmill motors on fleebay just in case my motors pours the magic smoke out
I just read that I could/should also add the variable signal I send to P2 over to F- also, any comments?)
Below is the circuit I planned; I dunno if I could use pin 1 (as I won't use the solid-state relay), that'd let 2 outputs available for future use (e.g: 4th axis). Please let me know if I'm on the right track, or headed straight into a wall.
Thanks for the help.