After Micro swiss DD upgrade,Extruder skips steps

lui2004

Last question

I want convert the x axis with linear rails mgn12 bit i dont found nothing for mounting for micro swiss direct drive, anyone habe a link to stl file?

Thanks in advance

Veti

@lui2004

https://printermods.com/products/direct-drive-mod-for-creality-ender-3-cr-10

lui2004

@Veti

after i have changed the steppermotor this is my first benchy
i have a lot of stringing

my benchy:
alt text

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this are my Simplify3D settings:

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and my config.g

; Configuration file for Duet WiFi (firmware version 1.21)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2 on Tue May 07 2019 23:06:50 GMT+0100 (British Summer Time)

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

; Network
M550 P"Ender 5"                          ; Set machine name
M552 S1                                  ; Enable network
M586 P0 S1                               ; Enable HTTP
M586 P1 S0                               ; Disable FTP
M586 P2 S0                               ; Disable Telnet

; Drives
M569 P0 S1                               ; Physical drive 0 goes forwards
M569 P1 S1                               ; Physical drive 1 goes forwards
M569 P2 S0                               ; Physical drive 2 goes backwards
M569 P3 S1                              ; Physical drive 3 goes forwards
M584 X0 Y1 Z2 E3                               ; set drive mapping
M350 X16 Y16 Z16 E16 I1							; configure microstepping with interpolation
M92 X80.00 Y80.00 Z800.00 E278.17             ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E4000.00      ; Set maximum instantaneous speed changes (mm/min)
M203 X15000.00 Y15000.00 Z600.00 E8000.00  ; Set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z100.00 E5000.00          ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E1400 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 X220 Y220 Z300 S0                   ; Set axis maxima

; Endstops
M574 X1 S1 P"xstop"                            ; configure active-high endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop"                            ; configure active-high endstop for low end on Y via pin ystop
M574 Z1 S2 									   ; configure Z-probe endstop for low end on Z

;Filament Sensors
M591 D0 P2 C"!e0_stop" S1   			   ;Extruder 1(0)


M950 S0 C"exp.heater7"                         ; create servo pin 0 for BLTouch
M558 P9 C"^zprobe.in" H3 F60 T6000 A10 R0.75 S0.003            ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X41.2 Y4.5 Z1.785                   ; set Z probe trigger value, offset and trigger height
M557 X41.2:221.2 Y4.5:219.5 S20                       ; define mesh grid
M671 X28.8:198.8:198:28.8 Y24:24:194:194



; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B3950 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0                          ; create bed heater output on bedheat and map it to sensor 0
M307 H0 B0 S1.00                               ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                        ; map heated bed to heater 0
M143 H0 S120                                   ; set temperature limit for heater 0 to 120C
M308 S1 P"e0temp" Y"thermistor" T98801 B4185 ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1                           ; create nozzle heater output on e0heat and map it to sensor 1
M143 H1 S300 								   ; set temperature limit for heater 1 to 300C
M307 H1 B0 S1.00           

; 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
M950 F1 C"fan1" Q500                           ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 H1 T45                              ; set fan 1 value. Thermostatic control is turned on

; Tools
M563 P0 D0 H1                            ; Define tool 0 S3D
;M563 P0 D0 H1 F0							; Für Prusa Slicer
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 saving after power loss is not enabled

; Custom settings are not configured
M575 P1 S1 B57600 ; enable support for PanelDue
M572 D0 S0.15 ; Pressure Advance
M501

Veti

increase the retraction distance until the stringing stops

lui2004

The retraction speed is ok ?

In the manual of micro swiss direct drive os wrotten maximum distance 1.5 and max speed 35 ,can i go higher without Problems?

Veti

print this
https://www.thingiverse.com/thing:2563909

until you get no stringing.

stay with that retraction speed for now

lui2004

@Veti which max distance i should 2.0 or 2.5 ?

Veti

@lui2004

go up in 0.25 increments until the stringing stops

lui2004

ok mate thanks

i still print the restraction stl

lui2004

@Veti i am now retraction distance of 3,5mm at stringing is always on prints

is 3.5mm to much for direct drive ?

Veti

@lui2004

M308 S1 P"e0temp" Y"thermistor" T100000 B3950 ; configure sensor 1 as thermistor on pin e0temp

did you change the thermistor when you switched to the micro swiss?
Are you sure B3950 is correct?

lui2004

@Veti yes i have changed it like in the docu like this:

i have changed only the bed its a silicon bed with 100k NTC3950

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B3950 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0                          ; create bed heater output on bedheat and map it to sensor 0
M307 H0 B0 S1.00                               ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                        ; map heated bed to heater 0
M143 H0 S120                                   ; set temperature limit for heater 0 to 120C
M308 S1 P"e0temp" Y"thermistor" T98801 B4185 ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1                           ; create nozzle heater output on e0heat and map it to sensor 1
M143 H1 S300 								   ; set temperature limit for heater 1 to 300C
M307 H1 B0 S1.00

lui2004

@Veti i have checked the marlin source and there is for hotend thermistor:

100k thermistor - best choice for EPCOS 100k (4.7k pullup)

is config correct ?

Veti

what temperature are you printing at? what material?

lui2004

@Veti 210°C its PLA

Veti

@lui2004

try printing at 200 and 190 and go down and start at 1 mm retraction again.

lui2004

@Veti ok

Phaedrux

You can try adding this command to your config.g M204 P500 T2000 which will maintain your current acceleration for print moves, but allow faster acceleration for travel moves. This can help a bit with oozing by shortening the time of the travel moves.

This would also be a good time to look into tuning pressure advance and double checking your extruder calibration.

3.5mm seems high for a direct drive. I would use the micro swiss recommendation of 1.5mm distance and 35mm/s speed for retraction, and then tune pressure advance. Since it's a direct drive a good starting value would be M572 D0 S0.05.

https://duet3d.dozuki.com/Wiki/Pressure_advance

lui2004

@Phaedrux i can add it somewhere in the config ?

I will recheck the extruder tommorow

I will recheck the PA value my actual value is 0.15

Thanks

Phaedrux

Yes add to config.g

0.15 seems like a very high PA value for a direct drive extruder.