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Hardware & Machines
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Driver Boards
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7i77 Servo Enable
7i77 Servo Enable
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Posts: 33
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Thank you received: 2
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13 May 2021 17:18 #208743
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
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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13 May 2021 20:52 - 13 May 2021 21:00 #208754
by chris@cnc
I would try
aout => 42
gnd => 41
ena+ => 36
ena0- => 3
Last edit: 13 May 2021 21:00 by chris@cnc.
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13 May 2021 20:58 #208755
by MrSpeaky
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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13 May 2021 20:59 - 13 May 2021 21:01 #208756
by bevins
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.
Last edit: 13 May 2021 21:01 by bevins.
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13 May 2021 21:14 - 13 May 2021 21:19 #208757
by chris@cnc
I edit ena+ and ena0.
You should look online in servodriver to check i/o bits
Last edit: 13 May 2021 21:19 by chris@cnc.
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13 May 2021 21:26 - 13 May 2021 21:27 #208759
by chris@cnc
If ena0 => 37 and ena+ => 3 will happend nothing. On Second side is no com+
Last edit: 13 May 2021 21:27 by chris@cnc.
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14 May 2021 02:21 #208777
by Benb
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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14 May 2021 11:31 #208793
by MrSpeaky
Ive found another picture in the manual that might help
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14 May 2021 13:27 - 14 May 2021 13:28 #208801
by bevins
This is my suggestion. I always do it like this.
Put power on pins com on pin 37, + on pin 36,
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.
Last edit: 14 May 2021 13:28 by bevins.
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Hardware & Machines
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7i77 Servo Enable
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