Rotational C Axis not working

[Isaac Johnson]

Hi everyone, I'm needing help with getting my C axis to work and I feel like I've tried just about everything. I pressed the info icon in Issues & Solutions, followed to steps and it's still not working. I downloaded Mark's firmware for 5 axis (since I am using 4 axis). I checked my configuration file to make sure "extruder" isn't written anywhere. I've also connected the C axis to another port and it has worked so I know there isn't an issue with external connections/wiring. I basically feel like I've tried everything I could plus looking through past conversations to find the solution, but nothing has worked.

This seems like a fairly common issue so I'm sorry if this is repetitive for you guys. Any help is greatly appreciated.


Thank you,
Isaac

[mark maker]

Just a first guess:

https://github.com/openpnp/openpnp/wiki/FAQ#my-nozzle-is-not-turning-or-going-updown-when-i-jog-c-or-z

_Mark

Isaac --
You received this message because you are subscribed to the Google Groups "OpenPnP" group.
To unsubscribe from this group and stop receiving emails from it, send an email to openpnp+u...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/openpnp/a3f13b96-991b-4f60-921c-f24f66f7b2c9n%40googlegroups.com.

[Isaac Johnson]

Thanks Mark, I will try this on Wednesday when I have access to the machine again.

-Isaac

[Isaac Johnson]

Hey again Mark, I just double checked that the nozzle was the selected tool as shown in the link you provided, and the issue is still persistent.

-Isaac

On Friday, January 13, 2023 at 2:10:23 PM UTC-5 ma...@makr.zone wrote:

[mark maker]

please post a log at TRACE level and machine.xml

To view this discussion on the web visit https://groups.google.com/d/msgid/openpnp/28a754bd-d6d8-4a0c-b029-d24da59bafc9n%40googlegroups.com.

[Isaac Johnson]

Here is the machine.xml

How do I get my log at TRACE level as a file. I see the log tab and TRACE is selected but I'm not sure how to get it downloaded.

-Isaac

[Isaac Johnson]

Hold on I think I found it in the computer. Let me know if this is what you're looking for.

-Isaac

[mark maker]

In your machine.xml I see that the A axis is not reported.

            <reported-axes><![CDATA[ok C: X:100.0000 Y:100.0000 Z:0.0000]]></reported-axes>

This likely means you did not configure it properly in the Smoothieware config.txt

So send the config.txt

(I'm not the Smoothie expert per se, but maybe the error is obvious 😁, or other users can have a look and help)

_Mark

To view this discussion on the web visit https://groups.google.com/d/msgid/openpnp/59ba1f68-68ba-49c4-bee4-44ca1382a98fn%40googlegroups.com.

[Isaac Johnson]

Sure thing, here it is.

-Isaac

[mark maker]

I guess Smoothie does not like skipping axes. You have the A axis on the epsilon instead of the delta, and the delta is left undefined (if I remember correctly, assigning pins is actually enabling the axis).

  

#Y2(M4)
delta_current                                   1.5              # First extruder stepper motor current

#C axis (M5)
epsilon_steps_per_mm                               800              # Steps per mm for extruder stepper
epsilon_step_pin                              2.8              # Pin for step signal
epsilon_dir_pin                               2.13            # Pin for dir signal ( add '!' to reverse direction )
epsilon_en_pin                                4.29             # Pin for enable signal
epsilon_current                                    1.5              # Second stepper motor current
a_axis_max_speed                6000        # Maximum speed in mm/min
epsilon_max_rate                             300              # mm/s
epsilon_acceleration                500        # Acceleration for the stepper motor, as of 0.6, arbitrary ratio

I assume you want to configure two Y axes, that are paired, i.e. use the same logical Y axis, same step/dir pulses, but you want to use two (i.e. the beta and delta) stepper drivers.  I don't know how to do that.

Smoothie users, please help!

_Mark

To view this discussion on the web visit https://groups.google.com/d/msgid/openpnp/7ef822df-9e81-40d5-8a68-148121071981n%40googlegroups.com.

[Isaac Johnson]

Yeah exactly, I physically connected the pins for beta and delta. I see what you mean how I technically skipped an axis which could be throwing it off. I didn't expect that to be the issue.

But yeah, I definitely need help with configuring the 2 Y axes together in the configuration file as I assume I'll have to disconnect what I've done on the smoothieboard to have my rotational axis work.

Thank you!

Isaac

[Isaac Johnson]

Do you think connecting the second y axes to epsilon could solve the issue and switching the rotational axis to the delta pin would solve the issue. Cause then I wouldn't be skiiping a pin since the "empty" pin of the second Y  motor would be at the end of the board. Figured I could try this while I'm waiting for a response on another Smoothie user's input.

-Isaac

[mark maker]

Yeah, I guess it would make sense to swap them.

But you still need to drive the epsilon / Y2 pins with the same logical axis as the beta / Y pins.

It seems this is only possible using physical jumper wires, look for "Doubling stepper motor drivers" here:

http://smoothieware.org/general-appendixes#doubling_stepper_motor_drivers

But if I'm not mistaken you would use beta as the source (not gamma) and epsilon as the destination of the jumper wires.

_Mark

To view this discussion on the web visit https://groups.google.com/d/msgid/openpnp/c90e809c-b874-48b7-956b-6d0d55e08dcfn%40googlegroups.com.

[Isaac Johnson]

This solution worked!! All my axes (X, Y, Z, and C) are all working as they should. Thank you Mark for your speedy responses!

Best,

Isaac