basic question about Driver input signals
- acourtjester
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14 May 2021 21:37 #208861
by acourtjester
basic question about Driver input signals was created by acourtjester
Hi
new to Linuxcnc not cnc, I am starting to wire up my Mesa 7I76E. Question is the signals to the drivers. On all the other table I built I wired the driver with Step + and gound, and Dir+ and ground. Now the 7I76E has +5 volts, step+ step-, dir+ dir- and gound. I did see a post here that said about the same as I used before, step + and ground for the stepper signals and Dir+ and ground for the Direction signals.
thanks for the help
Tom
new to Linuxcnc not cnc, I am starting to wire up my Mesa 7I76E. Question is the signals to the drivers. On all the other table I built I wired the driver with Step + and gound, and Dir+ and ground. Now the 7I76E has +5 volts, step+ step-, dir+ dir- and gound. I did see a post here that said about the same as I used before, step + and ground for the stepper signals and Dir+ and ground for the Direction signals.
thanks for the help
Tom
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- tommylight
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14 May 2021 22:17 #208865
by tommylight
Replied by tommylight on topic basic question about Driver input signals
That should work OK.
Tom.
Tom.
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15 May 2021 03:07 #208885
by acourtjester
Replied by acourtjester on topic basic question about Driver input signals
thanks for the reply
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15 May 2021 23:24 #209004
by andypugh
Replied by andypugh on topic basic question about Driver input signals
If the drivers have differential inputs then differential wiring will be more noise resistant.
What are the drivers?
What are the drivers?
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15 May 2021 23:41 #209007
by acourtjester
Replied by acourtjester on topic basic question about Driver input signals
one DM860A and 2 DM542T
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16 May 2021 02:32 #209027
by rodw
Will be fine as proposed. Just leave the enable signals unconnected. they are a disable signal
Replied by rodw on topic basic question about Driver input signals
one DM860A and 2 DM542T
Will be fine as proposed. Just leave the enable signals unconnected. they are a disable signal
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16 May 2021 16:19 #209112
by andypugh
Both those drives have differential inputs, so I would wire them differential. Mesa Step+ to pulse+, step- to pulse-, and similarly for dir.
As has been said, there isn't a lot to be gained from wiring the enable with a stepper driver, it is just a waste of wire.
Replied by andypugh on topic basic question about Driver input signals
one DM860A and 2 DM542T
Both those drives have differential inputs, so I would wire them differential. Mesa Step+ to pulse+, step- to pulse-, and similarly for dir.
As has been said, there isn't a lot to be gained from wiring the enable with a stepper driver, it is just a waste of wire.
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16 May 2021 16:31 #209115
by acourtjester
Replied by acourtjester on topic basic question about Driver input signals
Thanks for the replies
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16 May 2021 16:36 #209118
by rodw
Replied by rodw on topic basic question about Driver input signals
My mistake. where you said step+ and ground, it should be step + and step - as Andy said.
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16 May 2021 23:55 #209187
by rollfree
Replied by rollfree on topic basic question about Driver input signals
Neither driver has differential inputs (DM860A nor DM542T). Both drivers have ordinary inputs with an optocouplers. See picture.
cdn.goodao.net/longs-motor/7af08ace2.jpg
A better option is to connect only DIR +, STEP + and GND signals (or DIR-, STEP- and + 5V).
cdn.goodao.net/longs-motor/7af08ace2.jpg
A better option is to connect only DIR +, STEP + and GND signals (or DIR-, STEP- and + 5V).
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