Stuck configuring 5i25 to run G540

More
07 Jul 2020 21:11 #173917 by naja452
Holy crap it works.

Please Log in or Create an account to join the conversation.

More
07 Jul 2020 21:30 - 07 Jul 2020 21:30 #173921 by PCW
Note: The G540 manual does not say what the output levels are
I would check that the G540 is not outputting 5V levels
Last edit: 07 Jul 2020 21:30 by PCW.

Please Log in or Create an account to join the conversation.

More
07 Jul 2020 21:30 - 07 Jul 2020 21:31 #173922 by naja452
The steps look much better, and every axis is moving now.



Now I just have to find a workaround for my dead GPIO 15.

Once the P2 adapter comes I'll test to see if the other bus is able to produce full steps at 5v and report back. If it cannot I'll probably get another card, or just use this for GPIO and go back to parallel for step generation, but until then it looks like this is the way to go.
Attachments:
Last edit: 07 Jul 2020 21:31 by naja452.

Please Log in or Create an account to join the conversation.

More
07 Jul 2020 21:31 #173923 by naja452
Thanks everyone for the help and the info!

Please Log in or Create an account to join the conversation.

More
07 Jul 2020 21:49 - 07 Jul 2020 21:51 #173925 by naja452
PS:

I think I found a comparable replacement for the PI5C bus on P3.

www.digikey.com/product-detail/en/on-sem...1MTDXFSCT-ND/3478341

I have to go through the data sheets to confirm, but if my testing with the DB25 adapter on P2 works, I'll try replacing the bus chip on P3 and see if that fixes the the dead gpio15 and the inability to hold a pulse at 5v.
Last edit: 07 Jul 2020 21:51 by naja452.

Please Log in or Create an account to join the conversation.

More
07 Jul 2020 21:56 #173926 by PCW
Note that the 6I25 outputs cannot drive to 5V, only 3.3V
Though they have pullups to 5V so will swing to 5V with no load

Please Log in or Create an account to join the conversation.

More
07 Jul 2020 22:04 #173928 by naja452
Oooooh, are you saying that it should never have worked for W3 to be in the 5v position with the g540 to begin with? That it should never have been able to drive steps at 5v?

I was under the impression that it was supposed to able to.

Please Log in or Create an account to join the conversation.

More
07 Jul 2020 22:08 #173929 by PCW
It should have worked since the G540 is supposed to accept 3.3V signals.

The drive may be limited in 5V mode if the bus switch is damaged since
it may draw current and drop its power supply below 4.1V, leading to
lower output drive voltage capability

Please Log in or Create an account to join the conversation.

Moderators: cmorley
Time to create page: 0.178 seconds
Powered by Kunena Forum