Y-stepper noise

Pertti

M906 Y800

I have tried all kinds of setups, parallel and serial, x,y,z etc.
I changed the y current to 800 but then the other motor refused to turn. I changed back to 1600 and bingo, no noise!!!!!!!!!!!!
I really don´t know what happened.
Thanks!
Next I´m trying to dualextrude.
Heating needs also some study.

Pertti

Here is my thermistor and hotend. The belong to Leapfrog Creatr. That´s all can tell.
Seems that I can settle the undulating red heath curve flat by M303 H1 S240 but it helps until I switch the machine off. I´d like to start the heating automatically by the uploaded gcode.
I also wonder how can I cold extrude the second extruder, what is the code?

Veti

@Pertti said in Y-stepper noise:

Here is my thermistor and hotend. The belong to Leapfrog Creatr. That´s all can tell.

measure the resistance at room temperature (25C) then using a known thermometer bring water to boiling (100C) and measure the resistance. that will let you caluculate the beta value.

Pertti

E1: 116.5 kOhm 22 degrees C , 7.0 kOhm at boiling water

Veti

from the table it seems to match a B3950 thermistor

https://www.makeralot.com/download/Reprap-Hotend-Thermistor-NTC-3950-100K.pdf

Pertti

Thanks Veti. Next step?

Pertti

For some reason my thermistors lost their resistance after boiling them in hot water...

Phaedrux

@Pertti Maybe they need to dry out?

Pertti

Yes indeed, now that they are dry they work fine. But the board has something wrong. The bed thermistor pins work ok with boiled thermistors, but the heater thermistor pins give 2000 degrees when tested with the "unboiled" bed thermistor.

Pertti

I also made changes to the config.g. I wonder if it has something to do with the problem.
; Heaters
M305 P0 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M305 P1 T100 B3950 R4700 ; set thermistor + ADC parameters for heater 1
M143 H1 S280 ; set temperature limit for heater 1 to 280C
M305 P2 T100 B3950 R4700 ; set thermistor + ADC parameters for heater 2
M143 H2 S280
; set temperature limit for heater 2 to 280C
M307 H1 A455.9 C183.2 D17.7 S1.00 V24.1 B0
M307 H2 A499.7 C172.7 D10.4 S1.00 V24.1 B0

Pertti

I think there´s something wrong with the board.
Some fuse I guess?

jay_s_uk

@Pertti that just means you haven't set up the temperature sensor correctly.
Your T values look a little low.
Can you post your latest config settings?

blt3dp

This post is deleted!

Pertti

I told above that I boiled the thermistors when calibrated them and after that this happened.

Pertti

New fuse is installed, but no effect.

dc42

@Pertti said in Y-stepper noise:

M305 P0 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M305 P1 T100 B3950 R4700 ; set thermistor + ADC parameters for heater 1
M143 H1 S280 ; set temperature limit for heater 1 to 280C
M305 P2 T100 B3950 R4700 ; set thermistor + ADC parameters for heater 2

The T100 values in the M305 H0 and M305 H1 commands are not right. Try T100000 which is what you already have in the M305 H0 command.

You don't need the R parameters, because the firmware knows what values the series resistors have.

Pertti

I changed the configuration, but the temperature stays in 2000C as in picture 16 Jan 2020, 20:19

droftarts

@Pertti 2000ºC means the pins are shorted. -273ºC means the pins are disconnected. If you disconnect the temperature sensor, does it go to -273? If not, check your VSSA fuse replacement soldering. Alternatively, connect a 100k resistor to the pins, which should read 25C. I have these for just this occasion:
alt text

Ian

Pertti

Hi droftarts

all temperature sensors disconnected -> temp 2000C
-E0 temperature sensor connected (100k measured) -> 2000C
E0 temperature sensor connected to Rumba worked ok

dc42

@Pertti said in Y-stepper noise:

Hi droftarts

all temperature sensors disconnected -> temp 2000C
-E0 temperature sensor connected (100k measured) -> 2000C
E0 temperature sensor connected to Rumba worked ok

Please post the config.g file that you are now using.