Welcome! Log In Create A New Profile

Sprinter - switching double axis motors

Posted by Arnold

Arnold

Sprinter - switching double axis motors
September 22, 2014 01:28AM

Registered: 10 years ago
Posts: 150

Hello everyone,
does anyone know how to change this in Sprinter ? I am playing with a little cnc and woud like to use different setup for axis. I need use double motors on Y not Z.

My reprap axis motors now:
X - 1
Y - 1
Z - 2
E - 1

I need:
X- 1
Y- 2
Z- 1
E- x

Edited 1 time(s). Last edit at 09/22/2014 01:29AM by Arnold.

Reply Quote

Traumflug

Re: Sprinter - switching double axis motors
September 22, 2014 06:21AM

Registered: 13 years ago
Posts: 7,616

Sprinter isn't exactly a good choice for CNC. It doesn't even support a standards compliant G0. GRBL and Teacup are much better.

All these double-motor Z axes aren't wired in software, but in hardware. One can run two steppers with a single stepper driver by connecting them in parallel or in series.

Generation 7 Electronics	Teacup Firmware	RepRap DIY

Reply Quote

Dust

Re: Sprinter - switching double axis motors
September 22, 2014 06:49AM

Admin
Registered: 13 years ago
Posts: 6,998

or you could just edit pins.h and swap the Y and Z axis over in firmware

Reply Quote

Arnold

Re: Sprinter - switching double axis motors
September 22, 2014 07:44AM

Registered: 10 years ago
Posts: 150

Hmm, I think the easiest way is maybe swap it directly in G-code, I just swap Y Z, I can then use Z like Y with two motors.

pins.h is good idea, Ill look at it too. Is there any line for easy swap or it needs large edit ?

Reply Quote

Dust

Re: Sprinter - switching double axis motors
September 24, 2014 05:00AM

Admin
Registered: 13 years ago
Posts: 6,998

6 line to find

step, direction and enable for Z and swap the numbers with those for Y. has to be in the correct board section for your hardware ramps, so type 33

so Line 455 onwards [github.com]

Reply Quote

Arnold

Re: Sprinter - switching double axis motors
October 13, 2014 04:59PM

Registered: 10 years ago
Posts: 150

Hi again,
so is it possible just connect 2 motors on one cabel and run them with one stepper without problem ? I looked at pins.h and there such a mess for me so I dont know what to change.

Reply Quote

Andrew Smith

Re: Sprinter - switching double axis motors
October 13, 2014 05:19PM

Registered: 13 years ago
Posts: 643

Yes, theres nothing to stop you wiring two steppers on one connector.

Or, the mod you need to make in pins.h is pretty simple:

#define Y_STEP_PIN 60
#define Y_DIR_PIN 61
#define Y_ENABLE_PIN 56
#define Y_MIN_PIN 14
#define Y_MAX_PIN -1 //15
#define Z_STEP_PIN 46
#define Z_DIR_PIN 48
#define Z_ENABLE_PIN 62
#define Z_MIN_PIN 18
#define Z_MAX_PIN -1 //19

should become

#define Y_STEP_PIN 46
#define Y_DIR_PIN 48
#define Y_ENABLE_PIN 62
#define Y_MIN_PIN 14
#define Y_MAX_PIN -1 //15
#define Z_STEP_PIN 60
#define Z_DIR_PIN 61
#define Z_ENABLE_PIN 56
#define Z_MIN_PIN 18
#define Z_MAX_PIN -1 //19

Reply Quote

Arnold

Re: Sprinter - switching double axis motors
October 13, 2014 05:47PM

Registered: 10 years ago
Posts: 150

Thank you Andrew for quick replay, I was confused by huge list in pins.h so I missed the Ramps section. I will test it tomorrow. thanks again