Centroid Community CNC Support Forum

how exactly does the enable work for the axis. what is the logic behind it.

Reason im asking is because the glentek amp drives do not have an enable on the drive. Do i need to use a relay to enable it with the enable circuit on the axis header? And if so is gnd is ok and open in not?

You will probably need a relay. If you are using Glentek analog amplifiers, it is likely that are on by default, but that they have an "inhibit" input.

Oak, OpticDirect and GPIO4D all will pull the enable low to enable the drive (current-sinking signal, active when the drive should be enabled).

Since the control will not regulate the analog output to hold position, it is important that you do not enable the drive (or, in this case, that you keep the drive disabled) until CNC12 calls for it to be enabled (causing the enable output on the hardware to be pulled low).

So, you should install relays (one per axis) with 24VDC coils. Connect the plus side of each relay coil directly to +24V. Connect the minus side of each relay coil to the respective enable output from the control board. Then wire whatever signal is needed to inhibit the drive through the normally closed contacts of the relay.

Yes it does have the inhibit circuit that is normally open. when pulled to gnd it will disable the drive. So do i still need a relay? And should i use a ssr so its faster reacting or does that really matter, vs the mechanical ?

looks like i need to reverse the signal for correct operation wich will require a relay. Or can i just invert the siganl in the oak using Ctrl I or is it hard coded?

It is hard wired and hard coded.

In any event you cannot invert outputs with Ctrl-Alt-i. That feature only works with PLC inputs, and only with INP1 - INP80.

The optically isolated dry contact output relays night be good for that situation
HiLetgo 4 Channel 24V Relay Module with OPTO-Isolated Support High and Low Level Trigger for PLC Automation Equipment Control
by HiLetgo
Learn more:

Yes i have the 8bank like those and also bought an 8 bank of 30a hd ones.

occustoms wrote: ↑Mon Dec 28, 2020 2:53 pm Yes i have the 8bank like those and also bought an 8 bank of 30a hd ones.

Well for 4 axis you only need four relays.
The point being is that you feed the input into the board and you can use whatever you need on the output side.


Marty

martyscncgarage wrote: ↑Wed Dec 30, 2020 12:33 pm

occustoms wrote: ↑Mon Dec 28, 2020 2:53 pm Yes i have the 8bank like those and also bought an 8 bank of 30a hd ones.

Well for 4 axis you only need four relays.
The point being is that you feed the input into the board and you can use whatever you need on the output side.


Marty

Yes i understand. i bought extra incase i needed them.

Question tho If im using a relay on centroid to trigger another relay, that is powering a motor do i still have to have a snubber? i would think not but im not sure.