Enable circuit

All things related to Centroid Oak, Allin1DC, MPU11 and Legacy products

Moderator: cnckeith

occustoms
Posts: 64
Joined: Sun Jan 27, 2019 3:51 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: Yes
MPU11 & GPIO4D -w/ 3rd Party Drives: Yes
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: No
CNC Control System Serial Number: none

Enable circuit

Post by occustoms »

how exactly does the enable work for the axis. what is the logic behind it.
occustoms
Posts: 64
Joined: Sun Jan 27, 2019 3:51 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: Yes
MPU11 & GPIO4D -w/ 3rd Party Drives: Yes
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: No
CNC Control System Serial Number: none

Re: Enable circuit

Post by occustoms »

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?
cncsnw
Posts: 1756
Joined: Wed Mar 24, 2010 5:48 pm

Re: Enable circuit

Post by cncsnw »

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.
occustoms
Posts: 64
Joined: Sun Jan 27, 2019 3:51 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: Yes
MPU11 & GPIO4D -w/ 3rd Party Drives: Yes
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: No
CNC Control System Serial Number: none

Re: Enable circuit

Post by occustoms »

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 ?
occustoms
Posts: 64
Joined: Sun Jan 27, 2019 3:51 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: Yes
MPU11 & GPIO4D -w/ 3rd Party Drives: Yes
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: No
CNC Control System Serial Number: none

Re: Enable circuit

Post by occustoms »

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?
cncsnw
Posts: 1756
Joined: Wed Mar 24, 2010 5:48 pm

Re: Enable circuit

Post by cncsnw »

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.
martyscncgarage
Posts: 7163
Joined: Tue Mar 28, 2017 12:01 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
CNC Control System Serial Number: none
Location: Mesa, AZ

Re: Enable circuit

Post by martyscncgarage »

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:
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
occustoms
Posts: 64
Joined: Sun Jan 27, 2019 3:51 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: Yes
MPU11 & GPIO4D -w/ 3rd Party Drives: Yes
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: No
CNC Control System Serial Number: none

Re: Enable circuit

Post by occustoms »

Yes i have the 8bank like those and also bought an 8 bank of 30a hd ones.
martyscncgarage
Posts: 7163
Joined: Tue Mar 28, 2017 12:01 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
CNC Control System Serial Number: none
Location: Mesa, AZ

Re: Enable circuit

Post by martyscncgarage »

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
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
occustoms
Posts: 64
Joined: Sun Jan 27, 2019 3:51 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: Yes
MPU11 & GPIO4D -w/ 3rd Party Drives: Yes
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: No
CNC Control System Serial Number: none

Re: Enable circuit

Post by occustoms »

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.
Post Reply