# Need Help -Klipper asking for stepper Z def using Delta printer and BLTouch **URL:** \ **Category:** General Discussion\ **Created:** [June 3, 2022, 8:09am UTC](https://klipper.discourse.group/t/need-help-klipper-asking-for-stepper-z-def-using-delta-printer-and-bltouch/3051 "2022-06-03T08:09:40Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![scy](https://avatars.discourse-cdn.com/v4/letter/s/b3f665/32.png) [@scy](https://klipper.discourse.group/u/scy)\ **Post date:** [June 3, 2022, 8:09am UTC](https://klipper.discourse.group/t/need-help-klipper-asking-for-stepper-z-def-using-delta-printer-and-bltouch/3051/1 "2022-06-03T08:09:40Z")
Hi all, Apologies since I recently posted this and got no response. I’ve been attempting to setup a Delta Printer with BLTouch and receive the dumbest error: Option ‘position\_max’ in section ‘stepper\_z’ must be specified. This makes no sense since deltas define their steppers as ABC. I suspect it is a problem arising from my BLTouch settings, I went through the configuration file and configuration references thoroughly and found no helpful information. Can anyone please tell me what I’m doing wrong or a direction to look? There is very little support for deltas and none that specify this issue. Thanks again Here’s what I have so far: [mcu] baud: 115200 serial: /dev/serial/by-id/usb-1a86\_USB2.0-Serial-if00-port0 #restart\_metho: arduino #pin\_map: arduino [printer] kinematics: delta max\_velocity: 300 max\_accel: 3000 max\_z\_velocity: 150 delta\_radius: 140 #steppers [stepper\_a] step\_pin: PF0 dir\_pin: !PF1 enable\_pin: !PD7 microsteps: 16 rotation\_distance: 40 endstop\_pin: ^PE4 homing\_speed: 50 homing\_retract\_dist: 20 position\_endstop: 550 arm\_length: 340.0 angle: 210 [stepper\_b] step\_pin: PF6 dir\_pin: !PF7 enable\_pin: !PF2 microsteps: 16 rotation\_distance: 40 endstop\_pin: ^PJ0 angle: 330 [stepper\_c] step\_pin: PL3 dir\_pin: !PL1 enable\_pin: !PK0 microsteps: 16 rotation\_distance: 40 endstop\_pin: ^PD2 angle: 90 [extruder] step\_pin: PA4 dir\_pin: PA6 enable\_pin: !PA2 microsteps: 16 rotation\_distance: 33.500 nozzle\_diameter: 0.400 filament\_diameter: 1.750 heater\_pin: PB4 sensor\_type: ATC Semitec 104GT-2 sensor\_pin: PK5 control: pid pid\_Kp: 22.2 pid\_Ki: 1.08 pid\_Kd: 114 min\_temp: 0 max\_temp: 250 [fan] pin: PH6 #bed [heater\_bed] heater\_pin: PH5 sensor\_type: EPCOS 100K B57560G104F sensor\_pin: PK6 control: watermark min\_temp: 0 max\_temp: 130 [delta\_calibrate] radius: 50 #sensor BLtouch [bltouch] #sensor\_pin: ^AR18 #control\_pin: AR11 sensor\_pin: ^PD3 control\_pin: PB5 pin\_move\_time: 0.680 stow\_on\_each\_sample: True probe\_with\_touch\_mode: False x\_offset: 0 y\_offset: 10 z\_offset: 1.6 pin\_move\_time: 0.4 [safe\_z\_home] home\_xy\_position: 10,10 speed: 40.0 z\_hop: 10.0 z\_hop\_speed: 10.0 [bed\_mesh] speed: 80 round\_probe\_count = 5 mesh\_radius = 90 mesh\_origin = 0,0 ---
**Author:** ![jakep\_82](https://avatars.discourse-cdn.com/v4/letter/j/ea666f/32.png) [@jakep\_82](https://klipper.discourse.group/u/jakep_82)\ **Post date:** [June 3, 2022, 3:18pm UTC](https://klipper.discourse.group/t/need-help-klipper-asking-for-stepper-z-def-using-delta-printer-and-bltouch/3051/2 "2022-06-03T15:18:04Z")
Please post a log. It’s not possible to determine the root cause of the issue without a log. ---
**Author:** ![scy](https://avatars.discourse-cdn.com/v4/letter/s/b3f665/32.png) [@scy](https://klipper.discourse.group/u/scy)\ **Post date:** [June 3, 2022, 9:25pm UTC](https://klipper.discourse.group/t/need-help-klipper-asking-for-stepper-z-def-using-delta-printer-and-bltouch/3051/3 "2022-06-03T21:25:24Z")
[klippy.log](https://klipper.discourse.group/uploads/short-url/pykcmyLhGVhC2OXUwv6Y3I5QP9S.log) (2.7 KB) Thank you so much for the response and yes, my error in not attaching a log file. I do see some possible debug paths in the text itself but would appreciate any guidance on how-to get it working properly. Evidently I’m still rather new to klipper. ---
**Author:** ![jakep\_82](https://avatars.discourse-cdn.com/v4/letter/j/ea666f/32.png) [@jakep\_82](https://klipper.discourse.group/u/jakep_82)\ **Post date:** [June 3, 2022, 9:45pm UTC](https://klipper.discourse.group/t/need-help-klipper-asking-for-stepper-z-def-using-delta-printer-and-bltouch/3051/4 "2022-06-03T21:45:07Z")
Pretty sure it’s not valid to use safe\_z\_home on a delta, and that’s the module producing the error. ---
**Author:** ![scy](https://avatars.discourse-cdn.com/v4/letter/s/b3f665/32.png) [@scy](https://klipper.discourse.group/u/scy)\ **Post date:** [June 3, 2022, 10:01pm UTC](https://klipper.discourse.group/t/need-help-klipper-asking-for-stepper-z-def-using-delta-printer-and-bltouch/3051/5 "2022-06-03T22:01:22Z")
That REALLY helped, my verbose brain thought safe homing was necessary because of the documentation. So far so good, klipper seems happy with the config. I’ll do some testing and post my final printer.cfg file for others that might require it. Again, thanks for your time!!! ---
**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\ **Post date:** [September 4, 2024, 11:07am UTC](https://klipper.discourse.group/t/need-help-klipper-asking-for-stepper-z-def-using-delta-printer-and-bltouch/3051/6 "2024-09-04T11:07:42Z")
Closed on September 4, 2024, 11:07am UTC