M221 not doing anything or?

deckingman

@martin1454 I've just tried on my machine. Entering M221 D0:1:2 Snnn only affects drive 0 - the other drives remain unchanged. So that confirms my thought that you have can't do all drives "en-bloc" and have to use separate M221 commands for each extruder.

When you printed your tower, were you using drive 1 or 4 rather than drive 0? If so, that would explain why you didn't see any change because using M221 D0:1:4 would only change the extrusion percentage for drive 0.

Edit. If you print another tower, it's a lot easier to use the sliders than inputting M221 commands each time. The result is the same. i.e. M221 Dn Snn will be sent whichever way you do it.

Martin1454

@deckingman said in M221 not doing anything or?:

Edit. If you print another tower, it's a lot easier to use the sliders than inputting M221 commands each time. The result is the same. i.e. M221 Dn Snn will be sent whichever way you do it.

Well, I don't wanna move the slider 1% each mm but will try with seperate M221 - My extruder was "#0" but on my panel due, it is the #4 extruder (as you can see on the picture). -

deckingman

@martin1454 said in M221 not doing anything or?:

@deckingman said in M221 not doing anything or?:

Edit. If you print another tower, it's a lot easier to use the sliders than inputting M221 commands each time. The result is the same. i.e. M221 Dn Snn will be sent whichever way you do it.

Well, I don't wanna move the slider 1% each mm but will try with seperate M221 - My extruder was "#0" but on my panel due, it is the #4 extruder (as you can see on the picture). -

Fair enough - trying to adjust the slider in 1% increments is a bit of a pain.

However, I'm confused by your extruder numbering. Can you post your config.g file - or at least the sections that show the drives and the tool definitions.

Martin1454

@deckingman for that tool:
M563 P0 D1 H4 F4 ; Define tool 0
G10 P0 X-10 Y0 Z0 ; Set tool 0 axis offsets
G10 P0 R0 S0 ;

I could see the web interface slider go down from 120 to 80 for tool 0 when it was running, but it didn't do anything to the print

Phaedrux

Is your extruder motor capped at a low speed?

deckingman

@martin1454 said in M221 not doing anything or?:

@deckingman for that tool:
M563 P0 D1 H4 F4 ; Define tool 0
G10 P0 X-10 Y0 Z0 ; Set tool 0 axis offsets
G10 P0 R0 S0 ;

I could see the web interface slider go down from 120 to 80 for tool 0 when it was running, but it didn't do anything to the print

I could really do with seeing all your tool definitions and drive mapping. However, according to the above, tool 0 uses extruder drive 1. So changing drive 0 won't do anything. If you are using M221 D0 Snn then try M221 D1 Snn.

Martin1454

@deckingman said in M221 not doing anything or?:

I could really do with seeing all your tool definitions and drive mapping. However, according to the above, tool 0 uses extruder drive 1. So changing drive 0 won't do anything. If you are using M221 D0 Snn then try M221 D1 Snn.

That was what I was wondering - Does M221 "D#" goes with your tool number, your heater number or stepper drive number? - My initial guess would be tool number, but will try with drive number #1 and only #1.

dc42

The M221 D parameter is the extruder drive number, as documented at https://duet3d.dozuki.com/Wiki/Gcode#Section_M221_Set_extrude_factor_override_percentage.

Martin1454

@dc42 said in M221 not doing anything or?:

The M221 D parameter is the extruder drive number, as documented at https://duet3d.dozuki.com/Wiki/Gcode#Section_M221_Set_extrude_factor_override_percentage.

Okay, so for my tool 0, the drive number is 1 right?

deckingman

@martin1454 said in M221 not doing anything or?:

@dc42 said in M221 not doing anything or?:

The M221 D parameter is the extruder drive number, as documented at https://duet3d.dozuki.com/Wiki/Gcode#Section_M221_Set_extrude_factor_override_percentage.

Okay, so for my tool 0, the drive number is 1 right?

Yes. But the extruder drive number isn't the same as the physical drive that the extruder drive is connected to. Confusing isn't it? The following might help to cut through the fog a little.

In my case, I use a mixing hot end which has multiple extruders feeding in to a common nozzle. So I have a number of tools which all use the same extruder drives like this:

M563 P0 D0:1:2:3:4:5 H1
M563 P1 D0:1:2:3:4:5 H1
etc.

In above "P" denotes the tool number which thereafter is referenced by using "T".

To use one particular filament, I have a different mixing ratio e.g.
M567 P0 E1.00:0.00:0.00:0.00:0.00 .
This will use 100% off the the first extruder (D0) and zero % of the rest.

The motor drives are physically mapped to extruders using the M584 parameter. In my case..
M584 X0:3 Y1:4 Z2 U10 V11 E5:6:7:8:9

So the first extruder is D0 but this is mapped to drive 5, the second is D1 which is mapped to drive 6 etc etc.

If you have M584 Xn Yn Zn E1:2:4, then your 3 extruder drives will be D0, D1 and D2 but mapped to physical drives 1,2 and 4. You can re-map the drivers associated with extruders but they will always be referred to as extruder D0, D1 and D2.

In summary, the extruder drive number used in M221 refers to the order that extruder drives are defined in M584. If there are only two extruders, the default (on a Duet Ethernet or WiFi) is D0 and D1.

TBH, I think the Wiki should be amended to clarify this. Try it first to make sure that what I've said is correct, then we'll look at getting that clarification put in the Wiki.

Martin1454

@deckingman Perfect thanks! - Will try a new Gcode tower when I get home.

And yes, a bit more clarification on the Wiki could be good -

How is it going with your everlasting project of a printer? Been some time since I saw a new post on your blog

deckingman

@martin1454 said in M221 not doing anything or?:

How is it going with your everlasting project of a printer? Been some time since I saw a new post on your blog

I'm working on something that has got beyond the initial design stage and now requires parts making from metal. This is proving to be much more of a pain than I ever thought it would be. I've decided that the best way forward is to actually buy a small milling machine and maybe a lathe so that I can make the parts myself. That requires turning my garage from a wood working shop into a metal working shop. The wood lathe has gone, and a new insulated garage door is on order but there is a lot more to do (and a fair bit of money to spend).

Martin1454

@deckingman Funny how these "small" projects always evolve into something much larger

Martin1454

It worked - My tool 0 needed only the "D1" parameter alone.

Thanks for the help!

deckingman

@martin1454 No worries - glad it's working for you.