7051
CS-Lab / Re: Question for TechCNC
« on: October 23, 2012, 10:06:04 AM »
Dan
I think what they are meaning is the encoder is a line driver but the buffered output from that particular drive is an open collector output.
On one of my drives I think the encoder outputs from the drive are not conditioned in any way and are just a direct pass through from the encoder and thus will be a line driver. On the other drive I have the choice of unbuffered or buffered but I think both of these will also be line driver outputs.
I am not sure how they would fare being connected to a CSMIO input as I think it is expecting somewhere in the region of 24v but possibly it would work? Sadly I am not great at electronics so I am not sure, hopefully Andrew can clear things up a bit.
Andrew,
you said the pulse needs to be widened by dividing the Index output, how much time is needed? If a drive was not capable of dividing the encoder outputs would reducing the homing speed have the desired effect? If that is the case then it may even be possible for that to be done in the plugin, ie home at a normal rate but have the back off from the switch at a much lower rate?
Hood
I think what they are meaning is the encoder is a line driver but the buffered output from that particular drive is an open collector output.
On one of my drives I think the encoder outputs from the drive are not conditioned in any way and are just a direct pass through from the encoder and thus will be a line driver. On the other drive I have the choice of unbuffered or buffered but I think both of these will also be line driver outputs.
I am not sure how they would fare being connected to a CSMIO input as I think it is expecting somewhere in the region of 24v but possibly it would work? Sadly I am not great at electronics so I am not sure, hopefully Andrew can clear things up a bit.
Andrew,
you said the pulse needs to be widened by dividing the Index output, how much time is needed? If a drive was not capable of dividing the encoder outputs would reducing the homing speed have the desired effect? If that is the case then it may even be possible for that to be done in the plugin, ie home at a normal rate but have the back off from the switch at a much lower rate?
Hood