USMarine, I have a similar setup and will be doing the same thing soon. I did some research to ensure that I'll be able to rigid tap, and get the full value from the Servo spindle. The best method that I have found is not to use the typical SwapAxis method, but rather simply using BOTH the Spindle step/dir pins and the A-axis step/dir pins both set to the same output ports/pins in Mach3. The wiring will be just as you did XYZ with step/dir wires feeding from your BOB to the DMM driver's pins 11 & 22 (5V) and pins 10 and 23 (output pins from your BOB) . When you need to tap, you'll use A axis G-code.There is a video on Youtube demonstrating this method, and it appears to work well.
There may be better methods, but this is the best I've stumbled across and what I plan to use once I have time to finish up the servo spindle motor mounts, etc. Chime back if you find a better method, many of us would appreciate the guidance.
-Mike
Last edited by mikegiraud; 12-15-2019 at 09:56 AM.
So I plug in the cable from the dyn4 drive into A axis on the breakout board?
From what I understand on page 9 http://www.dmm-tech.com/Files/DMB425...tVer010106.pdf
A axis dir is pin 8 and A axis stp is pin 9?
So I go to configure ports and pins in mach 3 and say spindle is those ports and pins and also A axis?
Is there anything else I need to do to have mach 3 be able to start and run spindle with m3 s#### command?
Have you figured out what needs to be done in the Dyn4 drive tuning software? The gear # and other settings?
Thanks for your informative post
Not the same servo but similar set up. Did you find a way to control the spindle with m3sxxx command? I see many tips with its easy use step/dir but no one thst shows free pics and give a full answer to understand how to do you actually control this servo spindle... The more I read, the more I get confused. :-(
I figured out how to get it to work.
-I got another DMM breakout board
-Attached ribbon cable from ESS port 3 to dmm BOB
-connected cable going from Dyn4 drive to X axis connector plug on new dmm BOB.
-Set port and pins for spindle to port 3 pin ( whatever the dmm bob pins are for step and direction for x axis)
-To get the rpm to be correct I had to go to motor tuning in mach 3 and adjust that acc/velocity graph.
-There a couple things I think I had to also change in ess config page in mach 3
- Also was able to connect a cnc4pc pulse indexer to c10 bob so mach 3 can show rpm.
Tomorrow I can take pics of relevant screens
I put what is in what I just posted. 5mm gt2 timing pulley, 60 teeth for the one connected to the servo motor, 30 teeth for the one on spindle