Dear all, I would like to ask for your assistance with the SKR 1.4 turbo board (5xTMC2130). I want to run a cnc machine (RPI controlled over serial). Previously I was running the configuration with X axis instead of Z where I used two sockets for X and X2 motors with one driver. However, I was disappointed with the accuracy (GT2 belt 1200 : 1200 mm system). I have read that going to separate drivers might help. However, I stumbled up on some issues. In the setup - with belts. I have 2 motors for X coordinate. Y and Z single motor work fine (I also use bl touch - works fine). I enabled X2_DRIVER_TYPE and SPI mode. M119 list all endstops as open (for now I have only one endstop for X, other for X2 is disabled - tried with it enabled, did not work) and M122 List all 4 motors (no errors). When I run G0X10 command only one motor (X2) moves. Directly after G0Y command, when moving the X and X2 by hand it seems there is very little bias applied on the X motor (unplugging the cable makes the movement easy). X2 on the other hand is rock solid. Could you please advise how to solve this? No belts, motor spin free: Both X and X2 work, however holding power of X motor is significantly lower. I have 12V power supply supporting 20A. I tried swapping to Y instead of X (same problem). I tried to move around the drivers in different sockets (same problem). Eventually I would like to redefine E1 as a rotation stage too (I_DRIVER_TYPE). That worked for me in the past but in this setup I got extra errors. Thank you a lot! https://reprap.org/forum/read.php?415,896006,896006#msg-896006 Sun, 09 Aug 2026 18:35:01 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?415,896006,896016#msg-896016 https://reprap.org/forum/read.php?415,896006,896016#msg-896016
Any suggestions how can I fix them better to the shaft?]]> cidokz Firmware - Marlin Wed, 30 Oct 2024 16:45:41 -0400 https://reprap.org/forum/read.php?415,896006,896008#msg-896008 https://reprap.org/forum/read.php?415,896006,896008#msg-896008
I still do not understand why having same system (same belt tension and V wheels) works better (similar hold power) when one driver (Z) is used for both motors.

For current configuration I did not redefine any pins. Now X2 is plugged into E0.

To compensate for low holding I cannot swap my V wheels but I can reduce the belt tension.]]> cidokz Firmware - Marlin Tue, 29 Oct 2024 17:58:16 -0400 https://reprap.org/forum/read.php?415,896006,896007#msg-896007 https://reprap.org/forum/read.php?415,896006,896007#msg-896007

When you enable a driver type X2 marlin auto allocates the first unused E as X2, so the first X is plugged into X plug and the X2 is plugged into E0 or E1 plugs (what ever is still un allocated) (unless you have changed the pins files to explicitly define the X2 pins)]]> Dust Firmware - Marlin Tue, 29 Oct 2024 17:43:05 -0400 https://reprap.org/forum/read.php?415,896006,896006#msg-896006 https://reprap.org/forum/read.php?415,896006,896006#msg-896006
I would like to ask for your assistance with the SKR 1.4 turbo board (5xTMC2130). I want to run a cnc machine (RPI controlled over serial).

Previously I was running the configuration with X axis instead of Z where I used two sockets for X and X2 motors with one driver. However, I was disappointed with the accuracy (GT2 belt 1200 : 1200 mm system). I have read that going to separate drivers might help. However, I stumbled up on some issues.

In the setup - with belts.
I have 2 motors for X coordinate. Y and Z single motor work fine (I also use bl touch - works fine). I enabled X2_DRIVER_TYPE and SPI mode. M119 list all endstops as open (for now I have only one endstop for X, other for X2 is disabled - tried with it enabled, did not work) and M122 List all 4 motors (no errors). When I run G0X10 command only one motor (X2) moves. Directly after G0Y command, when moving the X and X2 by hand it seems there is very little bias applied on the X motor (unplugging the cable makes the movement easy). X2 on the other hand is rock solid. Could you please advise how to solve this?

No belts, motor spin free:
Both X and X2 work, however holding power of X motor is significantly lower.

I have 12V power supply supporting 20A.

I tried swapping to Y instead of X (same problem). I tried to move around the drivers in different sockets (same problem).

Eventually I would like to redefine E1 as a rotation stage too (I_DRIVER_TYPE). That worked for me in the past but in this setup I got extra errors.

Thank you a lot!]]> cidokz Firmware - Marlin Tue, 29 Oct 2024 17:17:54 -0400