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Extruder 2 can't reverse turn?

Posted by cthsieh

cthsieh

Extruder 2 can't reverse turn?
July 04, 2017 11:36PM

Registered: 9 years ago
Posts: 39

Dear all,
Currently I am trying to configure the Marlin for my new machine which has two extruders with one single nozzle.
Both extruders can be controlled by Repieter-host, but there is one problem.
Extruder 0 can run correctly in both-side rotation, but Extruder 1 can only one (+) side rotation.
Does anyone have this same problem?
Thank you!

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o_lampe

Re: Extruder 2 can't reverse turn?
July 05, 2017 02:09AM

Registered: 8 years ago
Posts: 5,232

Have you checked the 2nd extruder port for shortcuts or the like? Maybe the trace on the PCB to the dir-pin is broken?

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cthsieh

Re: Extruder 2 can't reverse turn?
July 05, 2017 04:25AM

Registered: 9 years ago
Posts: 39

Thank you for your nice response.
I used Repetier-host to test my machine.
If I send the Gcode command to control Extruder 2 with low speed, it is OK.
There is one question.
I configured both of extruders with same parameters in marlin, but they didn't have same running when I tested them by Repetier-host.
the attachment is the configurattion header file.
Thank you!

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Attachments:
open | download - Configuration.h (63 KB)

o_lampe

Re: Extruder 2 can't reverse turn?
July 05, 2017 10:03AM

Registered: 8 years ago
Posts: 5,232

At first glance, I found three parameters for E1 weren't set.

**
 * Default Axis Steps Per Unit (steps/mm)
 * Override with M92
 *                                      X, Y, Z, E0 [, E1[, E2[, E3[, E4]]]]
 */
#define DEFAULT_AXIS_STEPS_PER_UNIT   { 100, 100, 100, 544.0, 544.0}  // default steps per unit for Kossel (GT2, 20 tooth)

/**
 * Default Max Feed Rate (mm/s)
 * Override with M203
 *                                      X, Y, Z, E0 [, E1[, E2[, E3[, E4]]]]
 */
#define DEFAULT_MAX_FEEDRATE          { 300, 300, 200, 45, 45 }

/**
 * Default Max Acceleration (change/s) change = mm/s
 * (Maximum start speed for accelerated moves)
 * Override with M201
 *                                      X, Y, Z, E0 [, E1[, E2[, E3[, E4]]]]
 */
#define DEFAULT_MAX_ACCELERATION      { 1000, 1000, 1000, 1000, 1000}

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cthsieh

Re: Extruder 2 can't reverse turn?
July 05, 2017 11:21AM

Registered: 9 years ago
Posts: 39

Thank you for your kind reply.
Since the extruders are same model, I disable "DISTINCT_E_FACTORS" to ignore the settings for extruder 2.
Actually, I did try your suggestion, but the extruders stil run differently with same Gcode command.