After Micro swiss DD upgrade,Extruder skips steps

[lui2004]

@Veti

I have this :

M308 S1 P"e0temp" Y"thermistor" T100000 B3950 ; 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           

NTC-Thermistor 100 K 3950

Thermistor Cartridge:
Size: 1.25mmx2.0mm glass bead
High accuracy: 1%
Resistance value at 25°C=100K
Wiring length: 1m / 39.3"
Operating temperature range: -40 ° C + 300 ° C
Rated power: 45MW
 

[Veti]

yeah that is why i dont like B3950 thermistors. the reported temperature can be way off.

[lui2004]

@Veti so the Problem is the thermistor?

So i will wait the New one

[Veti]

most likely yes.

[lui2004]

@Veti

i have installed the new thermistor but i can print pla with 235°C i dont now why

[Veti]

@lui2004
its not uncommon for the 3950 to be off by 20C

did you change the beta and C value?

[lui2004]

@Veti

i have installed the Semitec 104GT-2 today

my config for this :

M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8 ; 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 S280 								   ; set temperature limit for heater 1 to 300C
M307 H1 B0 S1.00           
 

[lui2004]

@Veti

thats the thermistor: 104NT-4-R025H42G Semitec Thermistor 100K - NTC

i checked the datasheet and the B Value seems to be: 4267 ?

datasheet:

https://reprapworld.de/datasheets/NTCThermistor_NT-461415.pdf

[Veti]

@lui2004 said in After Micro swiss DD upgrade,Extruder skips steps:

i checked the datasheet and the B Value seems to be: 4267 ?

B and C change the algorithm to steinhart hart. its more accurate.

see the table

https://duet3d.dozuki.com/Wiki/Connecting_thermistors_or_PT1000_temperature_sensors#Section_Thermistor_parameters

[lui2004]

@Veti

the config is also ok like that ?

[Veti]

yes, but its still strange that you need 235 to print pla.

do you have a steel nozzle?

[lui2004]

@Veti

yes, hardened steel with Micro Swiss all metal hotend

[Veti]

@lui2004 ]

ok steel nozzle a very bad for printing pla. the thermal transfer is very low.

unless you are printing abrasive materials, a brass nozzle is a lot better.

or if you want a much better nozzle, there are copper plated nozzles
https://de.aliexpress.com/item/4000007458595.html

[lui2004]

@Veti

i print only PLA and Petg

[Veti]

then there is no need for a steel nozzle

[lui2004]

@Veti

Ok i have a cooper plated, i will change now and test it

[lui2004]

@Veti @Phaedrux

I have changed the nozzle and Calibrated all, all works fine now.
I can print PLA with 200°C! Thanks

i have another question i have Bed compensation in use: none is this normal ? i thin it should be mesh or not ?

if you need config.g or slicer start.gcode or anything else tell me i will post it

[Veti]

@lui2004

for that your G29 needs to be executed after the G28 in the slicer start code

[lui2004]

@Veti

my start.gcode looks like that:

T0
G90                ;absolute positioning
M107              ;start with the fan off
M83  	       ; extruder relative mode
M104 S[first_layer_temperature] ; set extruder temp
M140 S[first_layer_bed_temperature] ; set bed temp
; Homing & leveling
G28
M561 ; Clear any bed transform that might be in place		      
G1 X73 Y106 F4000 ; Go to bed center before probing
;Wait for Temperature
M109 S[first_layer_temperature] ; wait for extruder temp
M190 S[first_layer_bed_temperature] ; wait for bed temp
G30 ; Find the Z=0
G29 S1         ; Load the height map from the last time I used G29 to probe the bed.
G1 X5 Y10 Z0.2 F3000 ; get ready to prime
G92 E0 ; reset extrusion distance
G1 X160 E15 F600 ; prime nozzle
G1 X180 F5000 ; quick wipe

[Veti]

this should activate the mesh compensation

do you have a heightmap it can load?