Ive got my scope hooked up to the 1st step pin of the db25 and acorn is configured from the wizard to use the db25 connector. Im feel like i am missing something as by default the pin is pulled high 5v and stepping pulls it to 0v. I would have thought it 0 and then pulled high. I've attached an image of the scope and as you an see there are some spikes in there which I was also surprised to see on my first bench tests?
Is ok am I missing something? Pulldown resistors?
any help appreciated
https://drive.google.com/file/d/1B8ZHea ... sp=sharing
acorn db25 voltage clarifications
Moderator: cnckeith
-
Navanod
- Posts: 21
- Joined: Fri Mar 11, 2022 3:32 pm
- Acorn CNC Controller: Yes
- Plasma CNC Controller: No
- AcornSix CNC Controller: No
- Allin1DC CNC Controller: No
- Hickory CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
acorn db25 voltage clarifications
(Note: Liking will "up vote" a post in the search results helping others find good information faster)
-
eng199
- Posts: 447
- Joined: Fri Jan 10, 2014 11:29 am
- Acorn CNC Controller: Yes
- Plasma CNC Controller: No
- AcornSix CNC Controller: Yes
- Allin1DC CNC Controller: Yes
- Hickory 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: acorn db25 voltage clarifications
The outputs can be inverted in the wizard if they are not what you need.
A spike or ringing is normal on any fast edge. This is more a function of what is connected ('scope lead. etc.) than the output driver. For most applications it can be considered a measurement artifact ("not real").
A spike or ringing is normal on any fast edge. This is more a function of what is connected ('scope lead. etc.) than the output driver. For most applications it can be considered a measurement artifact ("not real").
(Note: Liking will "up vote" a post in the search results helping others find good information faster)
-
Navanod
- Posts: 21
- Joined: Fri Mar 11, 2022 3:32 pm
- Acorn CNC Controller: Yes
- Plasma CNC Controller: No
- AcornSix CNC Controller: No
- Allin1DC CNC Controller: No
- Hickory CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
Re: acorn db25 voltage clarifications
Yep ok tried the inversion again and looks good. For some reason when I tried before I didn't see a change..all good now(Note: Liking will "up vote" a post in the search results helping others find good information faster)