Extruder Motor Getting Hot.

[RAM]

@Veti said in Extruder Motor Getting Hot.:

@RAM said in Extruder Motor Getting Hot.:

but that doesnt seem to move it to center of the bed for some reason it is slightly out on the Y Axis. If I use the DWC and move it so that it is in the center as I need it then the Y should be at Y150 but it keeps kicking it down more when I print I can't figure it out.

forget trying to work that out in the center.

you got to work it out at 0,0
all the adjustment is happening with the M208

ok let me get this right before I go doing anything.
Home all axes then send the (G0 X0 Y0) via the DWC Console and then measure the distance to real X0 and Y0 (to where the certer of the bed is?)

If I home using the DWC Home X & Y buttons they home to X -4 Y -25 which is at the front left corner of my printer. If I use the home all then they home to X146.0 Y 150.0 which is bed center.

If I do home all from the DWC and then send (G0 X0 Y0) the print head goes to the front left corner of the print bed, If I then use the DWC to move the print head to the bed center the X&Y are at X143.0 Y153.0

What do I change this to
; Axis Limits
M208 X-4 Y-25.0 Z0 S1 ; set axis minima
M208 X270 Y285 Z480 S0 ; set axis maxima

I thought the axis minima & maxima was so that the printer knew what it was allowed to move the print head to as in a coded safe minimum and maximum movement limits

[Veti]

@RAM said in Extruder Motor Getting Hot.:

If I do home all from the DWC and then send (G0 X0 Y0) the print head goes to the front left corner of the print bed, If I then use the DWC to move the print head to the bed center the X&Y are at X143.0 Y153.0

again forget about the center of the bed.

is x0 y0 direct above the outermost point of the bed?

[RAM]

@Veti said in Extruder Motor Getting Hot.:

@RAM said in Extruder Motor Getting Hot.:

If I do home all from the DWC and then send (G0 X0 Y0) the print head goes to the front left corner of the print bed, If I then use the DWC to move the print head to the bed center the X&Y are at X143.0 Y153.0

again forget about the center of the bed.

is x0 y0 direct above the outermost point of the bed?

yes it is on the left front corner probably in about 8mm from the very edges of the bed.

[Veti]

@RAM
move the head using the controlls until its directly above.

that are the values that you need to adjust m208 by

[RAM]

@Veti

So move the head till it is directly above the corner of the bed then change the M208 so it says what the X & Y are if I am understanding you correctly.

[Veti]

if it for example reads

X7 Y6
then you need to subtract that from the your minimum values so that the x and y position are reduced.
i.e M208 X-11 Y-31.0 Z0 S1

[RAM]

@Veti said in Extruder Motor Getting Hot.:

if it for example reads

X7 Y6
then you need to subtract that from the your minimum values so that the x and y position are reduced.
i.e M208 X-11 Y-31.0 Z0 S1

Did what you told me to but nothing has changed.

; Axis Limits
M208 X-4 Y-15.0 Z0 S1 ; set axis minima was Y-25
M208 X270 Y285 Z480 S0 ; set axis maxima

[Veti]

after the change if you go to x0 y0 is it exactly above the edge?

[dc42]

There is a wiki page about how to centre prints. https://duet3d.dozuki.com/Wiki/Centering_the_bed_or_setting_the_bed_origin

[RAM]

@Veti said in Extruder Motor Getting Hot.:

after the change if you go to x0 y0 is it exactly above the edge?

homing all axis then sending command (G0 X0 Y0) moves the nozzel so that it is at the left corner of the bed. BUT I cannot move the X axis over so that it is closer to the edge of the bed as its maximum movement is X-4 and that is also where it homes to which that I don't have a issue with.

@dc42 said in Extruder Motor Getting Hot.:

There is a wiki page about how to centre prints. https://duet3d.dozuki.com/Wiki/Centering_the_bed_or_setting_the_bed_origin

Yes I have read that before I even asked for help with this issue.
using the quote from that wiki page.

Xmin edge of the bed is at X=-100 and the homing switch triggers at X=(-100-8) = -108mm. Similarly, the Ymax edge of the bed is at Y=100 and the Y homing switch triggers at Y=(100+2) = 102mm. So we can use the following commands in config.g:

M208 S0 X-108 Y-100 ; set axis lower limits
M208 S1 X100 Y102 ; set axis upper limits

Xmin edge of the bed is atapproximately X=-14 and the homing switch triggers at X=(-4)
it homes to X-4 as that is where the home optical sensor is and I am not able to move it as that is the maximum of the frame size!

The Y Axis when homed is at -15 when moved to the edge of the bed using
(G0 X0 Y0) it is at the edge of the bed as it is expected to be following the instructions kindly given to me both by @Veti and that wiki page, However when sending a file to print it is not printing in the middle of the bed as the above picture clearly shows.

So I set the M208 in the config to
; Axis Limits
M208 X-4 Y-15.0 Z0 S1 ; set axis minima
M208 X270 Y285 Z480 S0 ; set axis maxima

So in short I don't have a clue as to why. I am clearly missing some bit of information or instructions that have been given to me.
Sorry if this is a pain to have to deal with but I need the help in trying to resolve this.

I am not bothered about the fact that the upload of gcode files fail when they are of a large size that never got sorted out and am quite happy to be pulling the SD card out of the Panel and transferring them that way from now on and having to baby step the DC42 Z-probe down to it's proper printing height even though it was definately setup correctly by me and Phaedrux in the start of this months ago. but having the prints not center to bed is something that I would very much like to get resolved as I am not able to utilise the whole of my print bed size due to the constraints of the frame size.

[Veti]

@RAM said in Extruder Motor Getting Hot.:

homing all axis then sending command (G0 X0 Y0) moves the nozzel so that it is at the left corner of the bed. BUT I cannot move the X axis over so that it is closer to the edge of the bed as its maximum movement is X-4 and that is also where it homes to which that I don't have a issue with.

i dont quite follow.
are you saying its physically not possible to reach 0,0 with your nozzle?

[RAM]

@Veti said in Extruder Motor Getting Hot.:

i dont quite follow.
are you saying its physically not possible to reach 0,0 with your nozzle?

That is what it looks like when the X axis is at 0 which is -4

It also homes at X -4 as that is where the home switch is at and I cannot move the X axis endstop.

Let's make this a bit simpler. Forget the X axis. The Y axis is not in the middle when printing still it is still out of center even though I have changed the M208 as I was instructed to.

[Veti]

what is the size of your bed?

of you go to Y<size of your bed> are you exactly on the other edge?

[RAM]

@Veti said in Extruder Motor Getting Hot.:

what is the size of your bed?

of you go to Y<size of your bed> are you exactly on the other edge?

The bed is X 320 Y 310, the maximum I can get to on the opposite corner (Back right) From (G0 X0 Y0) is X270.0 Y285.0 which this is set in the Gcode in S3D

[Veti]

if your nozzle can only move inside of the bed. then to be honest, centering is not important.

[RAM]

@Veti ok fair enough was just wanting it to be center but I can see your logic. Thanks very much for all the help.

[fcwilt]

@RAM said in Extruder Motor Getting Hot.:

@Veti ok fair enough was just wanting it to be center but I can see your logic. Thanks very much for all the help.

If you do want it centered it is quite easy.

You simply adjust the Y position after homing using G92 so that when Y is in the center of it's range it ends up at the center of the bed.

Frederick