7i76E input from common cathode integrated stepper
22 Sep 2023 16:33 - 22 Sep 2023 16:36 #281389
by ruffle
7i76E input from common cathode integrated stepper was created by ruffle
Sorry if this has been answered before. I did search but..... 
I have a stepper with an integrated driver being driven from a Mesa 7i76E in 'common cathode' mode (as per the diagram below). The 'common cathode' GND being the one from the stepper driver part of my 7i76E.
I'd like to attach the stepper's alarm signal to a 7i76E input.
My trusty multi-meter says that the stepper GND and Field GND are connected on the 7i76E and the VCC for the Alarm circuit would come from the field power 24V.
Can I do it like this without encouraging the magic smoke to escape?
I have a stepper with an integrated driver being driven from a Mesa 7i76E in 'common cathode' mode (as per the diagram below). The 'common cathode' GND being the one from the stepper driver part of my 7i76E.
I'd like to attach the stepper's alarm signal to a 7i76E input.
My trusty multi-meter says that the stepper GND and Field GND are connected on the 7i76E and the VCC for the Alarm circuit would come from the field power 24V.
Can I do it like this without encouraging the magic smoke to escape?
Please Log in or Create an account to join the conversation.
22 Sep 2023 16:51 #281391
by tommylight
Replied by tommylight on topic 7i76E input from common cathode integrated stepper
This would be better, adding another resistor and having the two outputs separate, i have no idea what PED does, and having it disable the machine would not be nice. You can use just one resistor and one input if you do not need PED, whatever that is, (probably "drive OK?"), just cut the line in red.
Attachments:
Please Log in or Create an account to join the conversation.
22 Sep 2023 17:20 - 22 Sep 2023 17:30 #281397
by ruffle
Replied by ruffle on topic 7i76E input from common cathode integrated stepper
FWIW PED is 'In Position' (which I'm not planning on using or connecting to).
The inbuilt controller actually has ALM+, ALM-, PED+ and PED- connectors so I can ignore PED.
The diagram initially confused me and I mis-drew what I was thinking but your comments made me look again and it makes a bit more sense like so.
Thanks for the confirmation.
The inbuilt controller actually has ALM+, ALM-, PED+ and PED- connectors so I can ignore PED.
The diagram initially confused me and I mis-drew what I was thinking but your comments made me look again and it makes a bit more sense like so.
Thanks for the confirmation.
Please Log in or Create an account to join the conversation.
22 Sep 2023 17:29 #281399
by tommylight
In position that is active while the motor is not moving would cause a fault, preventing it from ever moving !
Replied by tommylight on topic 7i76E input from common cathode integrated stepper
Well, in that case the above schematics will cause a lot of trouble for poor users who try to stick to it.PED is 'In Position'
In position that is active while the motor is not moving would cause a fault, preventing it from ever moving !
Please Log in or Create an account to join the conversation.
22 Sep 2023 17:32 #281400
by ruffle
Replied by ruffle on topic 7i76E input from common cathode integrated stepper
Yet another underpaid Asian Proof reader I guess
Please Log in or Create an account to join the conversation.
22 Sep 2023 17:34 #281402
by tommylight
Replied by tommylight on topic 7i76E input from common cathode integrated stepper
Attachments:
Please Log in or Create an account to join the conversation.
Moderators: PCW, jmelson
Time to create page: 2.203 seconds