Dual head bioprinter

[falco22]

Hello everyone. I am building a low cost bio printer. The base moves on the fixed Y axis. The carriage moves on the X axis. On the X head it has two syringe heads. each head is held by a motor guide. The height of Z is determined by two independent rails, one for each head. I need to be able to manually set the 0 of each tool (because the commercial syringe tips are very different). For example, I am using this macro for syringe no. 1:

G28
G1 X90 Y100
M106 P0 S255
T1
G30 S-2
G28
T-1

I intend to have the same macro but on T0 for the other tool.
But when I start printing the machine does not remember the 0 that was set.
I need the machine to remember the 0 for each tool while the machine is on, and when it is turned off to reset both tools.

Thanks!

[Phaedrux]

Are you using the tool change functions?

https://docs.duet3d.com/en/User_manual/Tuning/Tool_changing

[falco22]

@phaedrux yes, but all the tool changer files are empty because I haven't configured them yet, so I don't know why the heater is activated at the beginning of the leveling.

config.txt.g

[Phaedrux]

@falco22 said in Dual head bioprinter:

I don't know why the heater is activated at the beginning of the leveling.

What gcode macro are you using to do the leveling?

[falco22]

@phaedrux
G28
G1 X90 Y100
M106 P0 S255
T1
G30 S-2
G28
T-1

[Phaedrux]

Please share your config.g, homeall.g, and any other macros that come into play.

Also the results of sending M122 and M98 P"config.g" in the gcode console.

[falco22]

@phaedrux
homeall.g
config.g
homex.g
homey.g
homez.g
resume.g
tfree0.g
tfree1.g
tpost0.g
tpost1.g
tpre0.g

• M122
• === Diagnostics ===
• RepRapFirmware for STM32F4 based Boards (fly_super8) version 3.4.0_1 (2022-03-17 12:50:35) running on STM32F4
• Used output buffers: 3 of 40 (13 max)
• === RTOS ===
• Static ram: 21344
• Dynamic ram: 75752 of which 0 recycled
• Never used RAM 32948, free system stack 214 words
• CCMRam static ram: 15868 dynamic ram: 19852 free ram 29812
• Tasks: NETWORK(ready,6.3%,265) HEAT(notifyWait,0.0%,347) Move(notifyWait,0.0%,361) FSWRITE(notifyWait,0.0%,566) MAIN(running,92.3%,452) IDLE(ready,1.4%,29), total 100.0%
• Owned mutexes: WiFi(NETWORK)
• === Platform ===
• Last reset 00:00:52 ago, cause: [power on/off]
• Last software reset at 2022-05-29 12:32, reason: User, GCodes spinning, available RAM 32948, slot 0
• Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00400000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
• Error status: 0x00
• Step timer max interval 0
• MCU temperature: min 32.7, current 39.6, max 39.7
• Supply voltage: min 12.1, current 12.1, max 12.2, under voltage events: 0, over voltage events: 0, power good: yes
• Heap OK, handles allocated/used 0/0, heap memory allocated/used/recyclable 0/0/0, gc cycles 0
• Events: 0 queued, 0 completed
• Driver 0: standstill 2209, SG min 0, reads 4586, writes 12
• Driver 1: standstill 2209, SG min 0, reads 4587, writes 11
• Driver 2: standstill 2209, SG min 0, reads 4586, writes 11
• Driver 3: standstill 2209, SG min 0, reads 4586, writes 11
• Driver 4: not present
• Driver 5:
• Driver 6:
• Driver 7:
• Driver 8:
• Driver 9:
• Driver 10:
• Date/time: 2022-05-30 19:14:07
• Slowest loop: 8.16ms; fastest: 0.09ms
• === Storage ===
• Free file entries: 10
• SD card 0 detected
• SD card longest read time 2.9ms, write time 0.0ms, max retries 0
• === Move ===
• DMs created 83, segments created 0, maxWait 0ms, bed compensation in use: none, comp offset 0.000
• === MainDDARing ===
• Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
• === AuxDDARing ===
• Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
• === Heat ===
• Bed heaters -1, chamber heaters -1, ordering errs 0
• === GCodes ===
• Segments left: 0
• Movement lock held by null
• HTTP is idle in state(s) 0
• File is idle in state(s) 0
• USB is idle in state(s) 0
• Aux is idle in state(s) 0
• Trigger is idle in state(s) 0
• Queue is idle in state(s) 0
• LCD is idle in state(s) 0
• Daemon is idle in state(s) 0
• Autopause is idle in state(s) 0
• Code queue is empty
• === Network ===
• Slowest loop: 24.51ms; fastest: 0.00ms
• Responder states: HTTP(2) HTTP(0) HTTP(0) HTTP(0)
• HTTP sessions: 1 of 8
• Uploads/Errors: 0/0
• • WiFi -
• Network state is active
• WiFi module is connected to access point
• Failed messages: pending 0, notready 0, noresp 0
• Bad header: 0/0
• WiFi firmware version 1.26-05S32-D
• WiFi MAC address 6c:5a:b0:2d:c4:6e
• WiFi Vcc 0.00, reset reason Power up
• WiFi flash size 0, free heap 148228
• WiFi IP address 192.168.1.133
• WiFi signal strength -26dBm, mode 802.11n, reconnections 0, sleep mode none
• Clock register 00000000
• Socket states: 4 0 0 0 0 0 0 0

---

M98 P"config.g"
HTTP is enabled on port 80
FTP is disabled
TELNET is disabled
Endstop configuration:
X: low end switch connected to pin !io0
Y: low end switch connected to pin !io1
Z: high end switch connected to pin io2

[Phaedrux]

Can you try uploading your config.g again? I can't seem to download it.

The only tool change file that has a temp command in it (or any command) is this one

; tpost0.g
; called after tool 0 has been selected
;
; generated by RepRapFirmware Configuration Tool v3.4.0-LPC-STM32+2 on Sat May 28 2022 18:17:41 GMT+0200 (hora de verano de Europa central)
; Wait for set temperatures to be reached
M116 P0

[falco22]

@phaedrux config.txt.g

[Phaedrux]

; Configuration file for Fly Super8 (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.4.0-LPC-STM32+2 on Sat May 28 2022 18:17:40 GMT+0200 (hora de verano de Europa central)
 
; General preferences
G90                                             ; send absolute coordinates...
M83                                             ; ...but relative extruder moves
M550 P"EXODO"                                   ; set printer name
 
; Network
M552 S1                                         ; enable network
M586 P0 S1                                      ; enable HTTP
M586 P1 S0                                      ; disable FTP
M586 P2 S0                                      ; disable Telnet
 
M302 P1
 
; Drives
M569 P0 S0                                      ; physical drive 0 goes forwards using default driver timings
M569 P1 S0                                      ; physical drive 1 goes forwards using default driver timings
M569 P2 S0                                      ; physical drive 2 goes forwards using default driver timings
M569 P3 S0                                      ; physical drive 3 goes backwards using default driver timings
M569 P4 S0                                      ; physical drive 4 goes backwards using default driver timings
M584 X0 Y1 Z2 E3:4                              ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1                      ; configure microstepping with interpolation
M92 X400.00 Y400.00 Z533.33 E40.00:40.00        ; set steps per mm
M566 X400 Y400 Z120 E120.00:120.00      ; set maximum instantaneous speed changes (mm/min)
M203 X3000 Y3000 Z180.00 E1200.00:1200.00 ; set maximum speeds (mm/min)
M201 X300 Y300 Z20.00 E250.00:250.00      ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E800:800 I30                ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                         ; Set idle timeout
 
; Axis Limits
M208 X0 Y0 Z0 S1                                ; set axis minima
M208 X180 Y200 Z200 S0                          ; set axis maxima
 
; Endstops
M574 X1 S1 P"!io0"                                                       ; configure switch-type (e.g. microswitch) endstop for low end on X via pin io0
M574 Y1 S1 P"!io1"                                                       ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin io1
M574 Z1 S1 P"io2"
M574 U2 S0 P"!io3"                               ; configure switch-type (e.g. microswitch) endstop for high end on Z via pin io2
 
; Z-Probe
M558 P0 H5 F120 T6000                           ; disable Z probe but set dive height, probe speed and travel speed
M557 X15:215 Y15:195 S20                        ; define mesh grid
 
; Heaters
M140 H-1                                        ; disable heated bed (overrides default heater mapping)
M308 S0 P"ADC_0" Y"thermistor" T100000 B4092    ; configure sensor 0 as thermistor on pin ADC_0
M950 H0 C"heat0" T0                             ; create nozzle heater output on heat0 and map it to sensor 0
M307 H0 B0 S1.00  I1                              ; disable bang-bang mode for heater  and set PWM limit
M143 H0 S120                                    ; set temperature limit for heater 0 to 120C
M308 S1 P"ADC_1" Y"thermistor" T10000 B3988     ; configure sensor 1 as thermistor on pin ADC_1
M950 H1 C"heat1" T1                             ; create nozzle heater output on heat1 and map it to sensor 1
M307 H1 B0 S1.00 I1                               ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S120                                    ; set temperature limit for heater 1 to 120C
 
; Fans
M950 F0 C"fan0" Q500                            ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H-1                                  ; set fan 0 value. Thermostatic control is turned off
 
; Tools
M563 P0 S"A" D0 H0 F-1                          ; 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
M563 P1 S"B" D1 H1 F-1                          ; define tool 1
G10 P1 X0 Y0 Z0                                 ; set tool 1 axis offsets
G10 P1 R18 S18                                    ; set initial tool 1 active and standby temperatures to 0C
 
; Custom settings are not defined
 

I don't see anything noteworthy in there other than the tool1 definition sets the active and standby temps to 18 for some reason.