Dual Z Stepper drivers

General Discussion
1

Anet AM8
BTT SKR 2

printer.cfg is set up for the BTT SKR 2 i have 2 stepper drivers and will be using a BlTouch

…[stepper_z]
step_pin: PA15
enable_pin: !PD1
dir_pin: PA8
microsteps: 16
rotation_distance: 32
endstop_pin: ^PC0
position_endstop: 0.5
position_max: 240

[stepper_z1]
step_pin: PD11
dir_pin: PD10
enable_pin: !PD13
microsteps: 16
rotation_distance: 32
endstop_pin: ^PC0
position_endstop: 0.5
position_max: 240

2

So what’s the purpose of this post?

Are you telling us what you are doing or do you have a problem?

If you have a problem, then you should have filled in the information that was requested of you (and included your klippy.log).

3

is this the proper setup for the 2nd z stepper

4

Without looking at your board pinout, That looks correct.

5

thankyou :grinning:

6

You’re going to have problems with your BL Touch.

You can only have one Z axis endstop and you need to set up your BL Touch according to:

https://www.klipper3d.org/BLTouch.html

7

myke is right, I missed the BLTouch part. You’re better off setting your BLTouch as a virtual z_endstop. See the link he posted along with these sections

https://www.klipper3d.org/Config_Reference.html#bltouch

https://www.klipper3d.org/Config_Reference.html#probe

Once you get that setup your config will look something like this… (this is from mine, though I don’t use a BLTouch)

[stepper_z]
step_pin: Z:PB4
dir_pin: Z:PB3
enable_pin: !Z:PA15
rotation_distance: 40
gear_ratio: 80:16
microsteps: 16
endstop_pin: probe:z_virtual_endstop
position_max: 310
position_min: -10
homing_speed: 20
second_homing_speed: 3
homing_retract_dist: 3
8

thankyou i appreciate it

9

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