@smece said in Precision Piezo Orion triggers when bed heater is active:

have you tried the digital output?

I am currently testing the digital output. That seems to be working so far.

@gtj0 said in Precision Piezo Orion triggers when bed heater is active:

Uhm, I didn't think the Orion had an analog output. No mention of it in the docs. How did you get it to provide an analog signal?
Anyway, it sounds like electrical interference. Do the bed and probe cables run next to each other at any point?

The new Orion v2 has an analog output.
The note with the cables was a good idea, unfortunately nothing changes when I put them around the outside of the printer.

I have a Precision Piezo Orion connected to my Duet 2 Wifi.
The Orion is conected via the analog output.

If the bed heating is off, everything is fine and works as desired.
As soon as I switch on the heating bed the orion triggers. The blue light on the Orion is permanently active.
And the Z-Probe value, shown in the Duet Web Control status filed, jumps arround 600. When the bed heater is off this Value is stable at 540.

The heated bed is connected via a mosfet.

I just updated the firmware of the Duet to 2.05. The problem is the same.

Does anyone have a hint for me on why this problem occurs via the Orion's analog output?

I think it would work with the digital output of the orion. But I would like to adjust the sensitivity via the config.

@wilriker I have tested with 800mA and 8mm/s and it worked very well.
Many thanks for the help and tips.

@wilriker Ok I will give it a try with lower speed. Thanks for the hint with the EMF Calculator... I think it becomes a little bit clearer now. So its better to set the motor current lower? I thought the more current the better/stronger. According to the calculator it schould be ok at 800mA and 8mm/s max speed.

I'm testing this with my fingers because one stepper also stuck when i try to move my bed and it gets misaligned and doesn't sounds good.

Thease are my steppers: https://www.omc-stepperonline.com/nema-17-bipolar-59ncm-84ozin-2a-42x48mm-4wires-w-1m-cable-and-connector-17hs19-2004s1.html?fbclid=IwAR3PZwkQqoAiMutKeY9D_wD-IKX-S3mH_jDWMbY_xA8TUxZ0e1n0hDpPs2I

@deckingman I can test this behavior with both motors.

The first motor I grab can be stopped the opossite one cant be stopped, this is possible with A and B.
If I stop A then B cant be stopped. If I stop B with my fingers then A cant be stopped.

If a motor was stopped, it does not start running again.

I can check the voltage this evening.

@deckingman Of course I removed the jumpers, otherwise I could not connect two steppers to Z

What is the problem now? The voltage doesn't is enough for both steppers?

@veti

Thank you for your reply.
So is it normal? Are the two Z Ports on the Duet Wifi wired in parallel or in series? Would it solve the problem to wire the two steppers in series? Or would it be best to use two drivers?

; Configuration file for Duet WiFi (firmware version 1.21)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2 on Sat Apr 20 2019 19:12:55 GMT+0200 (Mitteleuropäische Sommerzeit)

; General preferences
G90                                                ; Send absolute coordinates...
M83                                                ; ...but relative extruder moves

M667 S1                                            ; Select CoreXY mode

; Network
M550 P"HyperCube"                                  ; Set machine name
M551 P""                                           ; Set password
M552 S1                                            ; Enable network
M587 S"xxx" P"xxx"                                 ; Configure access point. You can delete this line once connected
M586 P0 S1                                         ; Enable HTTP
M586 P1 S0                                         ; Disable FTP
M586 P2 S0                                         ; Disable Telnet

; Drives
M569 P0 S1                                         ; Drive 0 goes forwards
M569 P1 S1                                         ; Drive 1 goes forwards
M569 P2 S1                                         ; Drive 2 goes forwards
M569 P3 S1                                         ; Drive 3 goes forwards
M350 X16 Y16 Z16 E16 I1                            ; Configure microstepping with interpolation
M92 X80.00 Y80.00 Z1600.00 E420.00                 ; Set steps per mm
M566 X900.00 Y900.00 Z12.00 E120.00                ; Set maximum instantaneous speed changes (mm/min)
M203 X6000 Y6000 Z1200 E4800                       ; Set maximum speeds (mm/min)
M201 X800.00 Y800.00 Z250.00 E800.00               ; Set accelerations (mm/s^2)
M906 X1000.00 Y1000.00 Z2000.00 E1000.00 I30       ; Set motor currents (mA) and motor idle factor in per cent
M84 S120                                           ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1                                   ; Set axis minima
M208 X300 Y300 Z400 S0                             ; Set axis maxima

; Endstops
M574 X1 Y1 S1                                      ; Set active high endstops

; Z-Probe
M574 Z1 S2                                         ; Set endstops controlled by probe
M558 P5 R0.4 H5 F1200 T6000                        ; Set Z probe type to effector and the dive height + speeds
G31 P500 X0 Y0 Z2.5                                ; Set Z probe trigger value, offset and trigger height
M557 X15:285 Y15:285 S20                           ; Define mesh grid

; Heaters
M307 H0 B0 S1.00                                   ; Disable bang-bang mode for the bed heater and set PWM limit
M305 P0 T100000 B4138 R4700                        ; Set thermistor + ADC parameters for heater 0
M143 H0 S120                                       ; Set temperature limit for heater 0 to 120C
M305 P1 T100000 B4138 R4700                        ; Set thermistor + ADC parameters for heater 1
M143 H1 S280                                       ; Set temperature limit for heater 1 to 280C

; Fans
M106 P0 S0 I0 F500 H T45                           ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P1 S1 I0 F500 H1 T45                          ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on

; Tools
M563 P0 D0 H1                                      ; Define tool 0
G10 P0 X0 Y0 Z0                                    ; Set tool 0 axis offsets
G10 P0 R0 S0                                       ; Set initial tool 0 active and standby temperatures to 0C

; Automatic power saving
M911 S22 R23 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss

; Custom settings are not configured

Hi, I'm building a Hypercube Evo with dual Z Steppers.

I have the problem when I connect two steppers to the Z-Ports, that I can easily stall one stepper with my fingers, when I set the Steps to 1600. I can only stop one stepper at a time, the other one can not be blocked. I can test this with both steppers, the first stepper I try to stop stalled.

When I try with 800 steps it is not possible to stop the steppers with my fingers.

Is this a normal behavior?
What is the reason?
What can I do to solve the problem?

• Duet Wifi v1.04
• Nema 17 Bipolar 59Ncm 1.8° 2A
• I power the Duet with 24V
• I have 10x2 Leadscrew, the calculator says I need 1600 Steps