Pwm Output on ribbon cable

All things related to the Centroid Acorn CNC Controller

Moderator: cnckeith

alimumtaz101
Posts: 18
Joined: Thu May 06, 2021 1:54 am
Acorn CNC Controller: No
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: No
CNC11: No
CPU10 or CPU7: No

Pwm Output on ribbon cable

Post by alimumtaz101 »

Hi everyone,

I have a simple question.
I have read on the forum as well as on the internet that pwm is only available on ouput no 2 of db25 and common is also there.

First question is, does the common of db25 is 5v or 24v or for both?

The second question is, can i use the pwm output from the ribbon cable which feed the ouput no 2 relay.(actually i dont want to use db25 port), so can i use pwm on ribbon cable or relay no 2 after cut it with the relay? And if i can use it so can i use the 24v common with this 5v pwm of this ribbon cable?
eng199
Posts: 372
Joined: Fri Jan 10, 2014 11:29 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
CNC Control System Serial Number: none
DC3IOB: Yes
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
Location: Howard, PA

Re: Pwm Output on ribbon cable

Post by eng199 »

PWM is too fast for a relay. There is no reason to continue on this course. The better option is to describe the problem you are trying to solve and let forum members suggest more viable solutions.
martyscncgarage
Posts: 9912
Joined: Tue Mar 28, 2017 12:01 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
Location: Mesa, AZ

Re: Pwm Output on ribbon cable

Post by martyscncgarage »

PWM is only available on the DB25.
DB25 pins 18-25 are common for the DB25 IO

As Eng199 said, its better for you to provide a clear picture of what you are trying to accomplish.

Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
alimumtaz101
Posts: 18
Joined: Thu May 06, 2021 1:54 am
Acorn CNC Controller: No
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: No
CNC11: No
CPU10 or CPU7: No

Re: Pwm Output on ribbon cable

Post by alimumtaz101 »

I know pwm is too fast for the relat and i dont want to use the relay, i just want to use that wire which goes to this relay after cut it from the relay. I am just asking, if i cut the ribbon cable which feed output 2 of the relay board so can i use use that ribon cable signal for pwm? Because i dont want to use db25 connector, so instead this can i use ribbon cable wire for pwm?
Would the pwn signal comes in the ribbon cable also which connect with output 2 relay?
alimumtaz101
Posts: 18
Joined: Thu May 06, 2021 1:54 am
Acorn CNC Controller: No
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: No
CNC11: No
CPU10 or CPU7: No

Re: Pwm Output on ribbon cable

Post by alimumtaz101 »

My simple question is that if i cut the wire which connect to relay 2, and after that i configure pwm enable in the wizard, so would the pwm signal come in that cut wire? Can i use that wire as pwm instead of using db25?


NOTE: MY english is not good, i dont know my point is clear for you guys or no. 🤔
tblough
Posts: 3072
Joined: Tue Mar 22, 2016 10:03 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
CNC Control System Serial Number: 100505
100327
102696
103432
7804732B977B-0624192192
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Boston, MA
Contact:

Re: Pwm Output on ribbon cable

Post by tblough »

martyscncgarage wrote: Fri Jul 30, 2021 10:33 am PWM is only available on the DB25.
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
martyscncgarage
Posts: 9912
Joined: Tue Mar 28, 2017 12:01 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
Location: Mesa, AZ

Re: Pwm Output on ribbon cable

Post by martyscncgarage »

alimumtaz101 wrote: Sat Jul 31, 2021 9:40 am My simple question is that if i cut the wire which connect to relay 2, and after that i configure pwm enable in the wizard, so would the pwm signal come in that cut wire? Can i use that wire as pwm instead of using db25?


NOTE: MY english is not good, i dont know my point is clear for you guys or no. 🤔
I didn't not understand WHY you won't use the DB25?
You need the DB25 PWM signal and you need the COM from pins 18-25 on the DB25. You can buy a DB25 male breakout board from Amazon for about $12. You could buy a DB25 connector and solder the two needed wired and plug just the connector in.

So, again please explain why you will not use the DB25?

Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
alimumtaz101
Posts: 18
Joined: Thu May 06, 2021 1:54 am
Acorn CNC Controller: No
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: No
CNC11: No
CPU10 or CPU7: No

Re: Pwm Output on ribbon cable

Post by alimumtaz101 »

Hi marty,
Actualy in my panel there is no space on db25 connector side, the duct is attached with it and i dont want to cut the duct, that is why i was thinking that maybe pwm is also availabe on ribon cable which is connected to output 2.
eng199
Posts: 372
Joined: Fri Jan 10, 2014 11:29 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
CNC Control System Serial Number: none
DC3IOB: Yes
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
Location: Howard, PA

Re: Pwm Output on ribbon cable

Post by eng199 »

The relay output is disabled when PWM is active. This was done so the relay doesn't buzz.
RogDC
Posts: 144
Joined: Wed Jan 01, 2020 2:40 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: Pwm Output on ribbon cable

Post by RogDC »

I used one of these DB25 connectors without the shell and cut off the leads from the RJ48 connector to pull the PWM output off of the DB25 pins.
db25 adapter.PNG
Post Reply