@alankilian
Thanks again my friend... I found out that the ground wire was a bit short and I pulled it out from the ferrule of the connector...

many thanks all who put an imput. Its appreciated a lot. Have a nice weekend.

@Phaedrux
I wish to clarify some thing about my printer.
I have set the power to 1000. The Belts are not tight. Just tight enough.

just to indicate my level of understanding on the matter, I own and run a CNC machine shop with various Vertical machining and turning centers/eroders/wire cut machines, programming and servicing for around 35 years.

This printer is one of two prototypes I designed and manufactured and spent much time with it. I wish to maybe market in the future. It is made entirely of metal,

This particular 3D printer runs reciprocating ball slides in X,Y and Z and I am prototyping running X and Y with reciprocating ball 12mm bal-lscrews. It has water cooling, twin extruders, and fully enclosed. Running it with a Duet is certainly a fitting suitable option.

The motors have to rotate faster and more with the balls-crews but certainly much stronger.

Yes the heat bed is a bit heavy as it is made from a 6mm machined frame and the bed is around 400 x 400 mm with a 3 mm borosilicate glass.

The extruders are custom made with a 1:3 reduction gearbox- spent around a year developing them.

The bottom line...

Now when I home- if I home at F100, the homing is smooth. Even movement is smooth, however on increasing the feed, like F500, there is noise and the motors vibrate... If I increase the feed like F1000, the motors will simply vibrate and whine and do not move.

I am thinking of switching to 24V and maybe go for the nema x 60mm larger motors. I can`t easily switch to an other type as it will involve extensive modifciations.

many thanks for your feedback.

Coming to ,

managed to run the extruders now. Apparently, I edited the config as per suggestion on a forum.. don not know if it was this or any other honestly since I had found it days ago and screen shot it out, But the extruders are running nicely by command..

@dc42
you were absolutely right in this as the sensors were thermistors. The resistance was 118 Ohms. Thermocouples do not have any or infinity. I was really misguided. I connected everything and tested and the temperatures showing are actual off by 1-2 degrees.

My profound apologies for the din I created but I am sure I have learnt something else.
many thanks to everybody who lent a hand.

@dc42
took off that comment and the error vanished... thanks so much
the matter is closed..

is it possible to switch a relay connected to pin 32 (pos-ve) and 12V vin on duet wifi board? and activating it by M42 P67 S1?

My circuitry incorporates a contactor and I can use it to power my printer off after it has cooled down.

What would be the voltage coming out from Pin 32 please. Many thanks

@dc42
took off that comment and the error vanished... thanks so much
the matter is closed..

@dc42
Hmmm
the homeall has that. But funnily enough it is appears 6 times....

this home all script has to be rethought when the printer is commissioned. The back off might not be proper in relative position.

G91 ;relative mode
G1 Z275 F2000 H1 ; move Z rapidly / 300mm up/ until Homing is triggered
G90 ;absolute mode
G1 Z260 F100 ; retract z 3mm slowly
G91 ;relative mode
G1 Z5 F25 H1 ; re-home at slow speed
G90 ; return to absolute mode
G1 Z261 ; back off

G91 ;relative mode
G1 Y400 F1000 H1 ; move Y rapidly / 300mm up/ until Homing is triggered
G90 ; return to absolute mode
G1 Y299 F100 ; retract Y 3mm slowly
G91 ;relative mode
G1 Y10 F25 H1 ; re-home at slow speed
G90 ; return to absolute mode
G1 Y300 ; back off reference at absolute

G91 ;relative mode
G1 X500 F1000 H1 ; move X rapidly / 300mm up/ until Homing is triggered
G90 ; return to absolute mode
G1 X344 F100 ; retract X 3mm slowly
G91 ;relative mode
G1 X10 F25 H1 ; re-home at slow speed
G90 ; return to absolute mode
G1 X344 ; back off reference at absolute

; homez.g
; called to home the Z axis
; Created by Tonio 28feb 2021
G91 ;relative mode
G1 Z275 F2000 H1 ; move Z rapidly / 300mm up/ until Homing is triggered
G90 ;absolute mode
G1 Z260 F100 ; retract z 3mm slowly
G91 ;relative mode
G1 Z5 F25 H1 ; re-home at slow speed
G90 ; return to absolute mode
G1 Z261 ; back off

; homey.g
; called to home the Y axis
;
; Created by Tonio 28feb 2021
G91 ;relative mode
G1 Y400 F1000 H1 ; move Y rapidly / 300mm up/ until Homing is triggered
G90 ; return to absolute mode
G1 Y299 F100 ; retract Y 3mm slowly
G91 ;relative mode
G1 Y10 F25 H1 ; re-home at slow speed
G90 ; return to absolute mode
G1 Y300 ; back off reference at absolute

; homex.g
; called to home the X axis
;
; Created by Tonio 28feb 2021
G91 ;relative mode
G1 X500 F1000 H1 ; move X rapidly / 300mm up/ until Homing is triggered
G90 ; return to absolute mode
G1 X344 F100 ; retract X 3mm slowly
G91 ;relative mode
G1 X10 F25 H1 ; re-home at slow speed
G90 ; return to absolute mode
G1 X344 ; back off reference at absolute

@fcwilt
nothing to loose by trying your suggestion...

@dc42
you mean the error is being generated by an improperly scripted homeall/homex/y/z right?
the homeall has all the three files scripts in it.

@fcwilt
That is exactly what I am doing. when I hit the end-stop a second time slowly - to be more precise.
then I back off away from the microswitch. The second back-off speed makes any difference? I decided to use absolute since the position is then accurate. I do not know if it makes a difference. At work I deal with a number of CNC machine tools- lathes, machining centers and others.. that is how they behave.

@siam
The exact script is this;-

mendelevium
mendelevium
6 Jun 2021, 12:15

Error: Bad command: this home all script has to be rethought when the printer is commissioned. The back off might not be proper in relative position.

Error: Bad command: this home all script has to be rethought when the printer is commissioned. The back off might not be proper in relative position.
I get this error 6 times (repeated 6 times when my printer does homing) I see nothing inappropriate. Any suggestions please? see my homing script....
many thanks in advance.

G91 ;relative mode
G1 Z275 F2000 H1 ; move Z rapidly / 300mm up/ until Homing is triggered
G90 ;absolute mode
G1 Z260 F100 ; retract z 3mm slowly
G91 ;relative mode
G1 Z5 F25 H1 ; re-home at slow speed
G90 ; return to absolute mode
G1 Z261 ; back off

G91 ;relative mode
G1 Y400 F1000 H1 ; move Y rapidly / 300mm up/ until Homing is triggered
G90 ; return to absolute mode
G1 Y299 F100 ; retract Y 3mm slowly
G91 ;relative mode
G1 Y10 F25 H1 ; re-home at slow speed
G90 ; return to absolute mode
G1 Y300 ; back off reference at absolute

G91 ;relative mode
G1 X500 F1000 H1 ; move X rapidly / 300mm up/ until Homing is triggered
G90 ; return to absolute mode
G1 X344 F100 ; retract X 3mm slowly
G91 ;relative mode
G1 X10 F25 H1 ; re-home at slow speed
G90 ; return to absolute mode
G1 X344 ; back off reference at absolute

Repetier firmware had a provision for inhibiting travel beyond the homing switch. The homing switch, after referencing would act as a limit switch which would restrict any movement beyond the switch. The duet firmware does not seem to have this am I right?or it can be set this way?

@phaedrux
I have firmware version 3.
I will try what you suggest, however will take a day or two as I have taken the controller off to complete the case...