Railcore Upgrades/Updates

[SonnyD1]

I have a Railcore ZL II with a Bondtech BMG, Mosquito, BLTouch running from a Duet2 and a Duex5. The umbilical is massive and I think it's about time to upgrade/update it to some newer technology. I'd like to add the nozzle swapping convenience of a Revo while still maintaining my high temp capabilities as well tool board benefits such as built in accelerometer and less wires. To that end, I am swapping to a Hemera XS w/ HT Revo hot side, Duet SZP running from a Duet 3 Mini 5 and a Duet 3 Tool Board 1LC v1.3. Im seeking feedback from the community. What are some things I may not have considered? How would you go about completing this upgrade/update? How much of my old config can I use? This is and has been my best printer for years. I don't want to make it worse, I want to make it better. Please, any and all feedback and thoughts are welcomed and appreciated.

[dc42]

@SonnyD1 what current are you running the stepper motors at? The Mini5+ has lower max motor current than the Duet 2 so check that it will be sufficient. Likewise for the tool board.

[SonnyD1]

@dc42 Here is my current config. I'm not opposed to changing the steppers if necessary. Currently running LDO 42STH40-1684MAC rated at 1.68A (XY & Z). The Hemera XS is rated at 1.4A. I would likely run that at 1000.

; Configuration file for SonnyD1
; Communication and general
M111 S0                             	                    ; Debug off
M550 P"RailCore"					                        ; Machine name and Netbios name (can be anything you like)
 
;*** Wifi Networking
M552 S1								                        ; Enable WiFi
M555 P2                           	                        ; Set output to look like Marlin
M575 P1 B57600 S1					                        ; Comms parameters for PanelDue
 
G21                                 	                    ; Work in millimetres
G90                                		                    ; Send absolute coordinates...
M83                                 	                    ; relative extruder moves
 
; Axis and motor configuration
M669 K1								                        ; set CoreXY mode
 
M584 X0 Y1 Z5:6:7 E3:4:8:9 		                            ; Map Z to drivers 5, 6, 7. Define unused drivers 3,4,8 and 9 as extruders
M569 P0 S0                                                  ; Drive 0 goes forwards (change to S0 to reverse it) X stepper (Rear)
M569 P1 S1                                                  ; Drive 1 goes backwards	Y Stepper (Front)
M569 P2 S1                                                  ; Drive 2 goes forwards		Unused
M569 P3 S0                                                  ; Drive 3 goes forwards		Extruder 
M569 P4 S1                                                  ; Drive 4 goes forwards		Extruder (unused)
M569 P5 S0							                        ; Drive 5 goes backwards	Front Left Z
M569 P6 S0							                        ; Drive 6 goes backwards	Rear Left Z
M569 P7 S0							                        ; Drive 7 goes backwards	Right Z
 
;Leadscrew locations
M671 X-40:-40:383  Y22.5:277.5:150 S7.5                     ;Front left, Rear Left, Right  S7.5 is the max correction - measure your own offsets, to the bolt for the yoke of each leadscrew
 
M350 X16 Y16 Z16 E16 I1	    		                        ; set 16x microstepping for axes & extruder, with interpolation
M574 X1 S1 P"xstop"					                        ; _RRF3_ set X endstop to xstop port active high
M574 Y1 S1 P"ystop"					                        ; _RRF3_ set Y endstop to ystop port active high
M906 X1340 Y1340 Z1000 E1000 I50	                        ; Set motor currents (mA)
M201 X3000 Y3000 Z100 E1500                                 ; Accelerations (mm/s^2)
M203 X24000 Y24000 Z900 E3600                               ; Maximum speeds (mm/min)
M566 X1000 Y1000 Z100 E1500                                 ; Maximum jerk speeds mm/minute
M208 X330 Y307 Z335                                         ; set axis maxima and high homing switch positions (adjust to suit your machine)
M208 X0 Y0 Z-0.5 S1                                         ; set axis minima and low homing switch positions (adjust to make X=0 and Y=0 the edges of the bed)
M92 X200 Y200 Z1600 E834.3	                                ; steps/mm
M579 X1.0 Y1.0 Z1.0 				                        ; scaling factor for Cartesian cords
 
; Thermistors
M308 S0 P"bedtemp" Y"thermistor" A"Bed Heater" T100000 B3950 R4700 H0 L0 		;_RRF3_ Bed thermistor, connected to bedtemp on Duet2
M308 S1 P"e0temp" Y"thermistor" A"Extruder" T100000 B4725 R4700 C7.06e-8 H0 L0	;_RRF3_ duet3 e3d
M308 S2 P"duex.e3temp" Y"thermistor" A"Chamber" T10000 B3892 R4700 H0 L0        ;_RRF3_Chamber thermistor probe, connected to E3 Temp on duex 
 
; Heaters
M950 H0 C"BedHeat" T0										;_RRF3_ define Bed heater is on bedheat
M140 H0														;__RRF3__ define bed heater (Required in 3.1 or later)
M950 H1 C"e0heat" T1										;_RRF3_ define Hotend heater is on e0heat
M950 H2 C"duex.e3heat" T2           						;_RRF3_define Chamber heater is on e3heat
M307 H0 B0 R0.345 C799.3 D21.12 S1.00 V24.1 				; Bed Heaters
M307 H1 B0 R2.270 C194.3 D6.41 S1.00 V24.1 					; Heater 1 model
M570 H1 S360											    ; Hot end may be a little slow to heat up so allow it 180 seconds
M143 S400
M143 H0 S140
 
; Fans
M950 F0 C"fan0" Q250                                        ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H-1                                              ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q250                                        ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 H1 T45                                           ; set fan 1 value. Thermostatic control is turned on at 45c
	
; Tool definitions
M563 P0 D0 H1                       						; Define tool 0
M563 P2 S"Chamber" H2
G10 P0 S0 R0                        						; Set tool 0 operating and standby temperatures
G10 P2 S0 R0                            					; Set Chamber display
 
 
M558 P9 C"^zprobe.in" H5 R1 F100 T6000 A5 S0.02  			; _RRF3_ BLTouch connected to Z probe IN pin
M950 S0 C"duex.pwm1"				   					 	; _RRF3_ Define BLTouch Servo (S0) on duet pwm1
G31 P25 X-4 Y42 Z2.55  										; Probe Trigger height/Z Offset and XY Offsets; If you have to move the nozzle closer to the bed, increase the G31 Z value by the amount of baby stepping used. If you have to move the nozzle farther away from the bed, decrease the G31 Z value by the amount of baby stepping used.
M557 X25:300 Y25:285 P2:2	                                ; minimum and maximum coordinates to probe
M501
 
T0					                                        ; select first hot end

[dc42]

@SonnyD1 that's fine for the Duet 3 Mini.

[SonnyD1]

@dc42 Do you think I should build a new config from scratch or just edit pins on this one?

[dc42]

@SonnyD1 if you are already running firmware 3.5.x or 3.6rc1 then try just changing the pin names. Otherwise I suggest you use the configuration tool to generate new files.

[droftarts]

@SonnyD1 What temperature do you run the chamber at? We generally suggest you shouldn't expose electronics (eg the 1LC and SZP) to temperatures more than 70°C ambient.

Also, have you considered the Roto board, instead of 1LC + SZP? This has the SZP built in, and has a more capable MCU. See https://docs.duet3d.com/Duet3D_hardware/Duet_3_family/Duet_3_Roto_Toolboard

Ian

[SonnyD1]

@droftarts I may got with your recommendation of Tooboard. I didn't realize all of the advantages of the Roto TB. My chamber temps average around a max of 62c (with a bed temp of 110c). I'll have to do some testing to see what higher bed temps bring it up to to make sure I stay lower. I was going to add a PTC heater but now I suppose I shouldn't. I just have to devise a mount for the Roto board onto a Hemera XS. I'm sure that won't be too difficult. Thank you for the heads up! Any more advice or considerations?