7i77 Servo Enable

MrSpeaky
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5 years 5 months ago #208743 by MrSpeaky

7i77 Servo Enable was created by MrSpeaky

Hello dear forum users

Ive nearly completed my wiring diagramm for my Mill retrofit
but i am not so sure about how to correctly wire my servo drivers to my 7i77

Attachment not found

how would you wire the four analog servo pins
aout
gnd
ena+
ena0-

i would kindly appreciate any help
thank you

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chris@cnc
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5 years 5 months ago #208754 by chris@cnc

Replied by chris@cnc on topic 7i77 Servo Enable

I would try
aout => 42
gnd => 41
ena+ => 36
ena0- => 3

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MrSpeaky
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5 years 5 months ago #208755 by MrSpeaky

Replied by MrSpeaky on topic 7i77 Servo Enable

Thank you know this is what i thought about too but i wasnt sure cause of com + thank you know i can be more sure of not killing my boards

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bevins
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5 years 5 months ago #208756 by bevins

Replied by bevins on topic 7i77 Servo Enable

Check you can move manuall and the encoder is moving in the right direction before enabling. If you didnt already know that.
and try putting a 1.5v battery on pins 41 and 42 after manually enabling. Just a little safeguard.

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chris@cnc
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5 years 5 months ago #208757 by chris@cnc

Replied by chris@cnc on topic 7i77 Servo Enable

I edit ena+ and ena0.
You should look online in servodriver to check i/o bits

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chris@cnc
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5 years 5 months ago #208759 by chris@cnc

Replied by chris@cnc on topic 7i77 Servo Enable

If ena0 => 37 and ena+ => 3 will happend nothing. On Second side is no com+

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Benb
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5 years 5 months ago #208777 by Benb

Replied by Benb on topic 7i77 Servo Enable

The last suggestion by Chris@cnc is correct .
From the diagram, the inputs are sourcing type ie negative logic.

ENA0- => 37 (neg of PS)
ENA0+ => 3 (DI-0)

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MrSpeaky
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5 years 5 months ago #208793 by MrSpeaky

Replied by MrSpeaky on topic 7i77 Servo Enable

Ive found another picture in the manual that might help

Attachment not found

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bevins
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5 years 5 months ago #208801 by bevins

Replied by bevins on topic 7i77 Servo Enable

This is my suggestion. I always do it like this.

Put power on pins com on pin 37, + on pin 36,

Code:

net Servo-enable machine-is-on output-pin

Coneect a relay to ouput pin and run pin 37 to one side of N.O relay and other side to pin 3.
That should enable your drive. I always use mesa boards like this and never had an issue.

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