Help wiring a 7i77
All I have so far on the 7i77 is inputs 0-7 which are all pendant controls:
0 = Estop
1 = Start
2 = Stop
3 = Z-
4 = Z+
5 = Y-
6 = Y+
7 = X-
8 = X+
I am not even sure where the out power should be for the above pendant buttons? I just don't understand which of the below pins connect to which encoder blocks and drive blocks on the 7i77? I appreciate any help!
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- Todd Zuercher
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For Joint-0 (X-axis) you would be connecting:
CN1A pin#5 => TB3 pin#7
CN1A pin#6 => TB3 pin#1
CN1A pin#7 => TB3 pin#4
CN1A pin#15 => TB3 pin#8
CN1A pin#16 => TB3 pin#2
CN1A pin#17 => TB3 pin#5
CN1B pin#1 => TB5 pin#3
CN1B pin#2 => TB5 pin#4
CN1B pin#20 => TB5 pin#1 (if CN1B-20 is ground, if it is +24v then switch with TB5#2)
CN1B pin#5 => TB5 pin#2
There may be more pins that could (or should) be connected but this is a minimum start. (and I could be wrong on some things)
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- MachineMan1
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Thanks in advance!
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- Todd Zuercher
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That said, you don't usually need to have encoder feedback to run position mode drives (step/dir, quadrature, or what ever signal you choose to use).
Your pulse train pins on the drive are 2 and 12 and 3 and 13, and would connect to their analogous pins on the 7i76. So if you have the drive configured for step/dir, and pin 2/12 is the dir+/dir- and 3/13 would go to the step+/step-.
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- MachineMan1
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Thanks for your help!
How many of these drives do you intend to connect to your 7i76? The 7i76 is intended for position control (digital position output) only and doesn't have the ability to read encoder feedback. At least not for each axis. The 7i76 does have one encoder input, intended to be used for reading the encoder on a spindle. If you want to use encoder feedback for all of your axis you will need another card in addition to or in place of the 7i76.
I'll be running four servos (XYZA) in position mode and one spindle servo in speed mode (using the analog channel).
That said, you don't usually need to have encoder feedback to run position mode drives (step/dir, quadrature, or what ever signal you choose to use).
Perfect it sounds like I picked the right Mesa daughter card. My servos support differential step/dir input and I'm planning to run them that way.
Your pulse train pins on the drive are 2 and 12 and 3 and 13, and would connect to their analogous pins on the 7i76. So if you have the drive configured for step/dir, and pin 2/12 is the dir+/dir- and 3/13 would go to the step+/step-.
Awesome thanks! This is exactly what I needed to know for the XYZA motors I have in position mode. For the spindle servo I've got in speed mode what do you recommend for the motor and servo connections?
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