SZP in touch mode
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Hello all,
I have designed a completely new print head on my printer because of the SZP.
I'm a little disapointed, the working hight is very limited. If it is too low I get 999999 readings and if it is too high too, I was able to find a working corridor of only 2mm.
I'm also not able to setup a Z offset with touch mode. I tried a work around within the beg.g file but this looks not the right way to me.
In addition to that I'm not shure if I understood the whole topic well enough. Maybe some of you found a mistake or better way to do in my attached files.
Thank you very much.
Best Regards
; bed.g ; called to perform automatic bed compensation via G32 ; ; generated by RepRapFirmware Configuration Tool v3.3.2 on Sun Sep 26 2021 18:00:56 GMT+0200 (Mitteleuropäische Sommerzeit) M561 ; clear any bed transform G90 ; absolute postioning G28 ; home G1 X60 Y5 Z3 F20000 ; M558.3 K0 S1 V0.6 F100 ; G30 K0 S-2 Z-99999 ; M558.3 K0 S0 ; G91 ; absoluterelative postioning G1 Z-0.025 ; G92 Z0 ; G90 ; absolute postioning G29 ; probe the bed and enable compensation; mesh.g T0 ; G90 ; absolute postioning G29 S2 ; clear hight map M557 X20:100 Y20:100 P10 ; Define grid for mesh bed compensation, origin in bed centre G31 K0 Z1.5 Y15.5 ; define probe 1 offsets and trigger height M558.1 K0 S0.3 ; Calibrate probe G1 Z5 ; Move up at end of calibration G29 S0 K0 ; Scan bed and create mesh; Configuration file for Duet 3 Mini 5+ (firmware version 3.3) ; executed by the firmware on start-up ; ; generated by RepRapFirmware Configuration Tool v3.3.10 on Wed Jan 12 2022 22:48:14 GMT+0100 (Mitteleurop ische Normalzeit) ; General preferences G4 S2 ; wait for expansion boards to start M575 P1 S1 B57600 ; enable support for PanelDue G90 ; send absolute coordinates... M83 ; ...but relative extruder moves M550 P"COREXY" ; set printer name M669 K1 ; select CoreXY mode ; Network M552 S1 P"Brinus&Chairex 2.4" ; enable network M586 P0 S1 ; enable HTTP ; ; Drives M569 P0.0 S0 D2 ; physical drive 0.0 goes forwards M569 P0.1 S1 D3 V10 ; physical drive 0.1 goes forwards M569 P0.2 S1 D3 V10 ; physical drive 0.2 goes forwards M569 P0.3 S0 D2 ; physical drive 0.3 goes forwards M569 P0.4 S1 D2 ; physical drive 0.3 goes forwards V2000 D3 M584 X0.1 Y0.2 Z0.3:0.4 E0.0 ; set drive mapping M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation M92 X160 Y160 Z480 E562 ; set steps per Z3200 E562 M201 X7500 Y7500 Z1500 E10000 ; Set print accelerations (mm/s^2) Z1200 M201.1 X500 Y500 Z500 E10000 ; Set accelerations for special moves (mm/s^2) M204 P7500 T7500 ; M203 X15000 Y15000 Z15000 E10000 ; Set maximum speeds (mm/min) Z1200 M566 X20 Y20 Z20 E10 P1 ; M205 X20 Y20 Z20 E10 P1 ; set maximum instantaneous speed changes (mm/sec) M205 X20 Y20 Z10 E10 P1 M906 X1650 Y1650 Z1250 E600 I15 ; set motor currents (mA) and motor idle factor in per cent M84 S60 ; Set idle timeout ; Axis Limits M208 X0 Y0 Z0 S1 ; set axis minima M208 X120 Y120 Z103 S0 ; set axis maxima ; Endstops M574 X1 S3 ; configure sensorless endstop for low end on X M574 Y1 S3 ; configure sensorless endstop for low end on Y M574 Z2 S1 P"io4.in" ; configure switch-type (e.g. microswitch) endstop for low end on Z via pin io0.in M574 Z1 S1 P"io4.in" M915 X Y S8 R0 F0 H400 ; Sensorless homing ; Scanning Z probe M558 K0 P11 C"120.i2c.ldc1612" F36000 T36000 ; configure SZP as probe 1, type 11, on CAN address 120 M308 A"SZP coil" S10 Y"thermistor" P"120.temp0" ; thermistor on SZP coil M558.2 K0 S18 R139427 ; set drive current and reading offset 18, offset is 139427 M557 X20:100 Y20:100 S10 ; Define mesh grid for probe 1 (overwrites probe 0 mesh grid) ; Sensors M308 S0 P"temp0" Y"thermistor" A"Heated Bed" T100000 B4725 C7.06e-8 ; configure sensor #0 M308 S1 P"temp1" Y"thermistor" A"Nozzle" T100000 B4388 C7.06e-8 ; configure sensor #1 ; Heaters M950 H0 C"out0" T0 ; create bed heater output on out0 and map it to sensor 0 M143 H0 P0 T0 C0 S115 A0 ; configure heater monitor #0 for heater #0 M307 H0 R1.088 K0.626:0.000 D3.70 E1.35 S1.00 B0 ; disable bang-bang mode for the bed heater and set PWM limit M950 H1 C"out2" T1 ; create nozzle heater output on out1 and map it to sensor 1 M143 H1 P0 T1 C0 S285 A0 ; configure heater monitor #0 for heater #1 M307 H1 R4.925 K0.407:0.472 D1.40 E1.35 S1.00 B0 V24.2 ; configure model of heater #1 ; Heated beds M140 P0 H0 ; configure heated bed #0 ; Fans M950 F0 C"out5" Q500 ; create fan 0 on pin out3 and set its frequency M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off M950 F1 C"out1" Q500 ; create fan 1 on pin out4 and set its frequency M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on M950 F2 C"out6" Q500 ; create fan 2 on pin out3 and set its frequency M106 P2 S0 H1 T45 ; set fan 2 value. Thermostatic control is turned off M950 F3 C"!out4+out4.tach" Q25000 ; create fan 3 on pin out4 and set its frequency M106 P3 S1 X0.45 H1 T50 ; set fan 3 value. Thermostatic control is turned off ; Tools M563 P0 D0 H1 F0 ; 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 ; Accelerometer M955 P120.0 I24 ; Add accelerometer on SZP with CAN address 120 and specify orientation ; Custom settings are not defined M501 ; -
@CaiJonas when the nozzle just touches the bed, what is the distance between the probe coil and the bed? What is the bed surface?
Duet WiFi hardware designer and firmware engineer
Please do not ask me for Duet support via PM or email, use the forum
http://www.escher3d.com, https://miscsolutions.wordpress.com -
@CaiJonas You may find this thread over on discord of interest. I went through most of the process of setting things up to use touch mode for homing (including using two different sensor current settings for rough homing/scanning and actual touch homing). Note that these instructions are for the "old" sensitivity setting in beta.4 not the new one used in rc.1, but the procedure is the same. Also be aware that this is just how I decided to go through the various steps, I'm sure there are better ways to do some of it. There are a couple of folks over there that have followed this process and that seem to have it working. Please make sure that you follow the steps with caution, you are after all crashing the nozzle into your bed. Please also remember that the current touch implementation is experimental and may change in future releases. Use it with care!
https://discord.com/channels/711873626080804914/1345788631457202239
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the distance is 4mm. If I reduce the distance I cannot use the touch mode because I get 999999 error when the nozzle touch the bed.
It is a textured pei plate with a magnetic foil to hold it.
Best Regards,
Cai -
Thank you very much for your help.
Unfortunately I cannot open the link. Could you please share again?
Best Regards,
Cai -
@CaiJonas you may need to join our discord channel before being able to open the link
https://discord.gg/uS97Qs7 -
@jay_s_uk great now it works. thank you very much
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@CaiJonas 2mm sounds like a very small window, I would expect more. I presume you have tried using different drive levels (M558.2). If you set the minimum drive level that doesn't give a 999999 reading with the nozzle touching the bed, how high can you raise the nozzle before you get a 999999 reading?
The RC1+2 firmware at https://www.dropbox.com/scl/fo/y03luwmbypirbxncla3rk/AAJFLPFsVdFylemyhkXsAac?rlkey=7cq4svp4rzl2ztdffpzq2ghjk&dl=0 may provide a larger window than RC1 does.
