7i76e

I’m making a video for you

Aldenflorio wrote:

 

I changed this switch. From 24v to 5v. This caused the motors to be able to jog. Why are you getting frustrated with me? I am trying. I’ve thanked you so many times for your time. I don’t know how to respond better. I’m trying to get your configuration working for me but it won’t let me toggle the e-stop. I’m TRYING.

im looking for what you said you linked to me and I did everything you suggested. I don’t know what you mean as linked to me 

The drive you you linked to was a DM566 now you are showing a DM442T the first not does not have that switch !!

I don't need to be thanked . But I do need to have questions answered.

You still not a answered the switch setting on the drive

RE. I changed this switch. From 24v to 5v. This caused the motors to be able to jog.
So now it appears to be working.

You need to jog it via the linux gui not pnconf

im sorry I didn’t mean to like the wrong drivers. The ones I’m using are the DM542T drivers. The others were from my last build

Clive wrote:

rodw wrote:

With a variant of the DM542, I just connected step+ and step- to pul+ and pul- and the same for dir.
Thats all I've ever done on any stepper driver.
I don't know what you mean by single ended. I assume it involves common signals. There is no place for it in the mesa ecosystem. Leave that to the Mach and grbl afficiondos.

Well I am sorry Rod but you are completely wrong in my opinion there are plenty of drives that can't accept differential inputs.
From the manual:
STEP/DIR INTERFACE
The 7I76E provides five channels of step/dir interface with buffered 5V differential
signal pairs. Each differential pair consists of two complementary 5V outputs. The
differential signals allows reliable signal transmission in noisy environments and can
directly interface with RS-422 line receivers. Step motor drives with single ended inputs
connect to just one of the STEP and DIR signal outputs, that is either the STEP+/DIR+ or
STEP-/DIR- signals, with the unused signals left unconnected at the 7I76E. The input
common signal on drives with single ended inputs connects to the 7I76Es GND or 5VP
pins depending on the drive type.

This is mudding the water for this guy by you saying he does not need 5V

He does not have a single ended drive by that definition as there are + and - connectors for both step and direction. So he does not connect +/-5V and just uses the mesa step +/- and dir +/-.  Some drive manuals only show diagrams for single ended which are not helpful.
It is academic now if he has movement.

I would turn my attention to the steplen parameters in the ini file at this point if they are too short, jitter could ocurr. Make them all about 10000 until movement is sorted, then progressively shorten to get desired performance.

I am so confused

rodw wrote:

Clive wrote:

rodw wrote:

With a variant of the DM542, I just connected step+ and step- to pul+ and pul- and the same for dir.
Thats all I've ever done on any stepper driver.
I don't know what you mean by single ended. I assume it involves common signals. There is no place for it in the mesa ecosystem. Leave that to the Mach and grbl afficiondos.

Well I am sorry Rod but you are completely wrong in my opinion there are plenty of drives that can't accept differential inputs.
From the manual:
STEP/DIR INTERFACE
The 7I76E provides five channels of step/dir interface with buffered 5V differential
signal pairs. Each differential pair consists of two complementary 5V outputs. The
differential signals allows reliable signal transmission in noisy environments and can
directly interface with RS-422 line receivers. Step motor drives with single ended inputs
connect to just one of the STEP and DIR signal outputs, that is either the STEP+/DIR+ or
STEP-/DIR- signals, with the unused signals left unconnected at the 7I76E. The input
common signal on drives with single ended inputs connects to the 7I76Es GND or 5VP
pins depending on the drive type.

This is mudding the water for this guy by you saying he does not need 5V

He does not have a single ended drive by that definition as there are + and - connectors for both step and direction. So he does not connect +/-5V and just uses the mesa step +/- and dir +/-.  Some drive manuals only show diagrams for single ended which are not helpful.
It is academic now if he has movement.

I would turn my attention to the steplen parameters in the ini file at this point if they are too short, jitter could ocurr. Make them all about 10000 until movement is sorted, then progressively shorten to get desired performance.

Rod you are mudding the water again. You are still wrong in my opinion. Not all drives will accept differential

I think this was the reason Peter quoted from another post.
It looks like the outputs don't have much output current (< 7 ma) so have a hard time
driving the termination resistors on the 7I77, I would try single ended mode.

I have made a config as you see in the vid with the drive using single ended.

Unfortunately he did not link to the correct drive as the one he is using it has switch . I believe will make drive to 24v or 5v inputs .I have not seen that before. When he put to 5V he now get jitter on the motor.

You maybe correct re the steplen it could also be to much acc.

Aldenflorio wrote:

I am so confused

Can you zip up you config and post it here.

Also post the setting of the switches on the drive

I will see if I can replicate it on my test bed.

    Here you go, thank you 

Don't forget the zipped up config

A link to the manual for the drive would be handy

Getting late now so we'll have to have a look at it in the morning
 

www.omc-stepperonline.com/digital-steppe...t.html?search=dm542t