thermistor bad reading

Phaedrux

@Phaedrux sorry i dont understand
veti said me that semitec-104nt o pt1000 is very ood sensor

I linked you to the E3D Semitec-104GT thermistor cartridge which is what I think Veti was referring to. I don't think you'll find a better or easier to obtain thermistor with known values and appropriate form factor.

ninni

@Phaedrux ok tu so Much

Phaedrux

Does your hotend heat block take a cartridge thermistor or a glass bead?

ninni

@Phaedrux block thermistor

Phaedrux

Does it look like the little metal tube in the E3D link above, or does it look like a little glass bead?

ninni

@Phaedrux small metal tube

Phaedrux

Then that E3D thermistor is the one you want.

Veti

https://de.aliexpress.com/item/32859917151.html

this is the alternative pt1000

ninni

@Veti ok we Will see

ninni

also I would like to report a bug. when the endstop is positioned upwards for the z axis the platter stops when it touches the endstop but if you give the command again it continues to rise ignoring that the limit switch was already pressed

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Sat Sep 26 2020 13:33:30 GMT+0200 (Ora legale dell’Europa centrale)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 X-235 Y-215 F1800 ; move quickly to X or Y endstop and stop there (first pass)
G1 H1 X-235 ; home X axis
G1 H1 Y-215 ; home Y axis
G1 X5 Y5 F6000 ; go back a few mm
G1 H1 X-235 F360 ; move slowly to X axis endstop once more (second pass)
G1 H1 Y-215 ; then move slowly to Y axis endstop
G1 H1 Z205 F360 ; move Z up stopping at the endstop
G90 ; absolute positioning
G92 Z0 ; set Z position to axis maximum (you may want to adjust this)

; Uncomment the following lines to lift Z after probing
;G91 ; relative positioning
;G1 Z5 F100 ; lift Z relative to current position
;G90 ; absolute positioning

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Sat Sep 26 2020 13:34:47 GMT+0200 (Ora legale dell’Europa centrale)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 Z205 F1800 ; move Z up until the endstop is triggered
G92 Z0 ; set Z position to axis maximum (you may want to adjust this)

; Uncomment the following lines to lift Z after probing
;G91 ; relative positioning
;G1 Z5 F100 ; lift Z relative to current position
;G90 ; absolute positioning

config.g
; Axis Limits
M208 X0 Y0 Z-200 S1 ; set axis minima
M208 X230 Y210 Z0 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 Z2 S1 P"zstop" ; configure active-high endstop for high end on Z via pin zstop

droftarts

@ninni said in thermistor bad reading:

M208 X0 Y0 Z-200 S1 ; set axis minima
M208 X230 Y210 Z0 S0 ; set axis maxima

Not a bug; you have put in strange values for Z axis minima and maxima. Firmware expects all moves to be in the positive range; no CAM/ slicer outputs negative absolute coordinates.

Ian

dc42

@ninni said in thermistor bad reading:

also I would like to report a bug. when the endstop is positioned upwards for the z axis the platter stops when it touches the endstop but if you give the command again it continues to rise ignoring that the limit switch was already pressed

The reason for that is the G1 H2 Z5 command in your homez.g file. That command tells the firmware to raise Z by 5mm, but that isn't appropriate when homing to max Z. You should probably remove the one in homeall.g too.