Mesa-Fanuc-PWM
31 Jan 2017 19:34 #87096
by Diederik
Replied by Diederik on topic Mesa-Fanuc-PWM
yep. no +-10V signals. Requires 6 PWM channels per axis. 3 for CW, 3 for CCW.
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31 Jan 2017 20:07 #87098
by andypugh
The synch to the commutation signals can be handled by:
linuxcnc.org/docs/2.7/html/man/man9/bldc.9.html
But are you sure that it is 3 signals for CW and 3 for CCW? Direct drive signals to the bridge elements seems more likely.
Is this documented anywhere?
Replied by andypugh on topic Mesa-Fanuc-PWM
Here follows the reply from my friend:
for each axis = 6 channels.
3 for cw,
3 for ccw
synchronized by pulse coder commutation signals and fed back via servo lsi.
The synch to the commutation signals can be handled by:
linuxcnc.org/docs/2.7/html/man/man9/bldc.9.html
But are you sure that it is 3 signals for CW and 3 for CCW? Direct drive signals to the bridge elements seems more likely.
Is this documented anywhere?
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31 Jan 2017 21:53 #87099
by Diederik
Replied by Diederik on topic Mesa-Fanuc-PWM
Hi Andy, Thanks again for your advice,
I have no documentation on this, But I trust my friend's advice on Fanuc, as he is a Fanuc specialist. That is his business, to repair Fanuc Components, He used to be the service manager for Fanuc South Africa, and has about 20 + years experience on Fanuc. I'll find out from him if he can give me a copy of the documentation though.
I have no documentation on this, But I trust my friend's advice on Fanuc, as he is a Fanuc specialist. That is his business, to repair Fanuc Components, He used to be the service manager for Fanuc South Africa, and has about 20 + years experience on Fanuc. I'll find out from him if he can give me a copy of the documentation though.
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05 Feb 2017 00:46 #87322
by Diederik
Replied by Diederik on topic Mesa-Fanuc-PWM
Hi Andy,
I didn't manage to get any documentation from my friend so far. I want to continue though, and would like advice as to what hardware you would reccomend for me to continue? And is there any sample configurations for the pwm controlled servo's? I would appreciate your and Peter's assistance in this. Any advice would help. (Thanks)
I would love to know which mesa cards to use for pwm. Andy, you mentioned about a fpga card to use. What would you suggest? Will something like a 7i80DB work? together with a 7i75? I suppose I will need 30 I/O for a 5 axis machine with pwm. so my configuration for this machine can be as follows:
7i80DB => J2 => 7i75 => PWM
=> J3 => 7i75 => PWM
=> J4 => 7i77 => 7i84(SS)
=> J5 => 7i77 => 7i84(SS)
Would this hardware configuration work for the PWM red cap Fanuc servo drives?
Just to recap: I confirmed each drive has 6 PWM channels, 3-CW, 3-CCW. I need to drive 5 Axis on this machine.
I didn't manage to get any documentation from my friend so far. I want to continue though, and would like advice as to what hardware you would reccomend for me to continue? And is there any sample configurations for the pwm controlled servo's? I would appreciate your and Peter's assistance in this. Any advice would help. (Thanks)
I would love to know which mesa cards to use for pwm. Andy, you mentioned about a fpga card to use. What would you suggest? Will something like a 7i80DB work? together with a 7i75? I suppose I will need 30 I/O for a 5 axis machine with pwm. so my configuration for this machine can be as follows:
7i80DB => J2 => 7i75 => PWM
=> J3 => 7i75 => PWM
=> J4 => 7i77 => 7i84(SS)
=> J5 => 7i77 => 7i84(SS)
Would this hardware configuration work for the PWM red cap Fanuc servo drives?
Just to recap: I confirmed each drive has 6 PWM channels, 3-CW, 3-CCW. I need to drive 5 Axis on this machine.
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05 Feb 2017 01:08 #87324
by Diederik
Replied by Diederik on topic Mesa-Fanuc-PWM
I apologize.
I Understood it wrong. the PWM channels (I think ... ) should be as follow:
phase-A
phase-B
phase-C
phase-A-inverted
phase-B-inverted
phase-C-inverted
I Understood it wrong. the PWM channels (I think ... ) should be as follow:
phase-A
phase-B
phase-C
phase-A-inverted
phase-B-inverted
phase-C-inverted
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