Posts made by Trixxter

Hello,

currently i have a strange temperature problem with my hotend.
After some successful prints i suddenly got a heater fault before the next print, mentioning that the temperature was rising too slow.

Wiring is ok, could not find any problems. After some more faults and new PID I reached the print temperature.
As soon as the print started it was obvious that something is wrong. Print was heavily stringy and the filament made cackling noises.
Managed to get a rough IR measurement on the heatblock at around 350C. Should have been 225.

At room temperature the thermistor shows the same value as the heat bed thermistor.
It is configured M305 P1 T100000 B4725 C0.0000000706 (e3d).

Just want to double check before I order a new thermistor, did not know this behaviour yet.

Thank you!

Still cant get it to work fne. I guess im completely missunderstanding this concept.
After MBL, where (X/Y) does the duet expect to be Z 0?

With activated MBL the nose would dig into the bed.
As you can see in Pos. 8 there is about 0.05 added to the Z Value.

The first layer gets too thin and print fails.

After I deactivate MBL the Z values are lower again.

Ok i try to describe what i have just done with results. Thank you for helping me even with my bad english

1. Heated up everything
2. Homed all axis
3. G32 to see if my bed is still where it belogs

G32
Manual corrections required: 0.00 turn up (0.00mm) 0.01 turn down (0.00mm) 0.03 turn down (0.01mm) 0.01 turn down (0.00mm)

3. Put the nozzel down, probed with thermopaper
4. Ran my IR Makro:

Stopped at height 2.350 mm 21:52:11
Stopped at height 2.350 mm21:52:08
Stopped at height 2.345 mm21:52:05
Stopped at height 2.348 mm21:52:02
M98 P"0:/macros/Z -IR kalibrieren"
Stopped at height 2.345 mm

Put 2.348 as Z Offset ( G31 P500 X 28 Y 10 Z 2.348) in config.g

5. Restarted Checked the Z Offset again, fine.

6. M561 ; Disable any current bed compensation
   G29 S2 ; Clear mesh bed compensation parameters
   G28 ; Home all
   G29 S2 ; Clear mesh bed compensation parameters
   G29

as discribed above by Phaedrux Result:

36 points probed, mean error -0.024, deviation 0.014
Height map saved to file heightmap.csv

7. Homed Z again an try to test the offset. - nozzle would have digged (this time slighly) into the bed.

8. IR Makro:
   Stopped at height 2.388 mm
   Stopped at height 2.385 mm
   Stopped at height 2.382 mm
   Stopped at height 2.382 mm
   M98 P"0:/macros/Z -IR kalibrieren"
   Stopped at height 2.382 mm

9. M561
   G29 S2

10. IR Makro:
    Stopped at height 2.345 mm
    Stopped at height 2.340 mm
    Stopped at height 2.345 mm
    Stopped at height 2.350 mm
    M98 P"0:/macros/Z -IR kalibrieren"
    Stopped at height 2.348 mm

After disabling the MBL Offset Offset it what it supposed to be again...
Is this the way it works?
What is a good reproducable way to level the bed for a good first layer hight?

Then it runs the mesh probes - and shows and me my hightmap.
When i Home Z again and check the nozzle hight, it would dig into the bed by about 0.5mm@ Z0 after that.

Hi dc42,

im homing with IR Probe.

Exactly, I use thermopaper to drop the nozzle and set G92 Z0.
After that i repeat
G1 Z5
G30 S-1
at least five times - the average value i use to offset z. in G31.

This works fine ( on that local spot) until i use mesh leveling.

Hello all together,

i have a hard time getting to good first layers. Right now im very confised about Z Offset in combination with mesh level.

I Home Z, bring the nozzel down, Zero Z, Let IR `probe five times, thake the result as Zero Offset. Works perfect until i start mesh leveling.

After that my offset is completly wrong and i have to start this prozess again.... and again....

What am i doing wrong?
Thank you all!