Mesa 7i76 spindle wiring to a Leeson Speed Master VFD

I'm converting a CNC Masters Baron Mill... I have the steppers wired but am confused on how to wire the spindle to the 7i76 board...

With the CNC Master's control board it used the first six pins.. Here's the wiring diagram from the manual

Any help wiring the tb4 pins to the VFD would be a huge help...

thanks

ok... I tried this wiring :

Tb4 - leeson
1 - 2
6 - 1
3 - 5
2 - 11
7 - 13a

If I enable the spindle in LinuxCNC I get nothing... so I tried jumping pins 1 to 11 on the leeson and I get forward motion... If I jumper 1, 11 and 13a I get reverse... now I need to figure out what to do next... not sure how to configure LinuxCNC to do this...

Figured I should share my Hal file... it's stock... I've not made any changes... I can see the voltage change on the VFD between pins 2 and 5...

setp pid.s.Pgain [SPINDLE_9]P
setp pid.s.Igain [SPINDLE_9]I
setp pid.s.Dgain [SPINDLE_9]D
setp pid.s.bias [SPINDLE_9]BIAS
setp pid.s.FF0 [SPINDLE_9]FF0
setp pid.s.FF1 [SPINDLE_9]FF1
setp pid.s.FF2 [SPINDLE_9]FF2
setp pid.s.deadband [SPINDLE_9]DEADBAND
setp pid.s.maxoutput [SPINDLE_9]MAX_OUTPUT
setp pid.s.error-previous-target true

net spindle-index-enable <=> pid.s.index-enable
net spindle-enable => pid.s.enable
net spindle-vel-cmd-rpm => pid.s.command
net spindle-vel-fb-rpm => pid.s.feedback
net spindle-output <= pid.s.output

# ---digital potentionmeter output signals/setup---

setp hm2_5i25.0.7i76.0.0.spinout-minlim [SPINDLE_9]OUTPUT_MIN_LIMIT
setp hm2_5i25.0.7i76.0.0.spinout-maxlim [SPINDLE_9]OUTPUT_MAX_LIMIT
setp hm2_5i25.0.7i76.0.0.spinout-scalemax [SPINDLE_9]OUTPUT_SCALE

net spindle-output => hm2_5i25.0.7i76.0.0.spinout
net spindle-enable => hm2_5i25.0.7i76.0.0.spinena
net spindle-ccw => hm2_5i25.0.7i76.0.0.spindir

# ---setup spindle control signals---

net spindle-vel-cmd-rps <= motion.spindle-speed-out-rps
net spindle-vel-cmd-rps-abs <= motion.spindle-speed-out-rps-abs
net spindle-vel-cmd-rpm <= motion.spindle-speed-out
net spindle-vel-cmd-rpm-abs <= motion.spindle-speed-out-abs
net spindle-enable <= motion.spindle-on
net spindle-cw <= motion.spindle-forward
net spindle-ccw <= motion.spindle-reverse
net spindle-brake <= motion.spindle-brake
net spindle-revs => motion.spindle-revs
net spindle-at-speed => motion.spindle-at-speed
net spindle-vel-fb-rps => motion.spindle-speed-in
net spindle-index-enable <=> motion.spindle-index-enable

# ---Setup spindle at speed signals---

sets spindle-at-speed true

I would wire it like this:

Note that unless you can program the VFDs pin 13 to be a direction pin rather than "run reverse",
an external relay may be needed to get bidirectional control.

Also I am assuming that the digital input reference is a positive voltage. if its ground and the run input is a positive voltage you will have to reverse TB4 pins 5 and 6

Hi buffcleb,
I also use a 7i76 on my machine, but i have a different VFD.
The spindle enable and direction on the 7i76 are open-collector outputs,
not sure but i think you have to connect TB4 Pin 5 and6 to VFD pin 1 and 11,
and for reverse TB4 7 and 8 to VFD 13a and 11

PCW wrote:

I would wire it like this:

7I76      LEESON     FUNCTION
TB4.1     2          ANALOG COMMON-
TB4.2     5          ANALOG SPEED CONTROL VOLTAGE
TB4.3     6          ANALOG VOLTAGE SUPPLY (+10V)
TB4.5     1          SPINDLE ENABLE - (RUN)
TB4.6    11          SPINDLE ENABLE +

Note that unless you can program the VFDs pin 13 to be a direction pin rather than "run reverse",
an external relay may be needed to get bidirectional control.

Also I am assuming that the digital input reference is a positive voltage. if its ground and the run input is a positive voltage you will have to reverse TB4 pins 5 and 6

This worked... thank you... tested it to full rpm and verified it with one of those laser meters... Here are the programable functions on the VFD...



None of those seem to be a direction... so I'm going to have to figure something out...

Do you have a link to a PDF version of the manual?

www.clrwtr.com/UserFiles/CT/Documents/Le...SM-Series-Manual.pdf

Those look just like the Lenze AC-tech drives I have on a couple machines. (I'm using Modbus to control those.)

yeah I would say the Lenze AC-tech SCM series are the same as the Leeson Speed Master VFD's... I don't see anything in the PDF about Modbus... I'll hunt around as see what I can find... maybe there's another manual about it...