disabling stepper motors

[Christopher]

I would like to disable the x& y motors while tramming allowing the carriage to be moved by hand. 

Is there a g-code command to disable specific stepper motors ? I can only find a way to turn them all of. 

Cheers 

[wolfmanjm]

No, you can only enable or disable all of them.

[Arthur Wolf]

If you really need independent control, you could configure the enable pins as nc in the normal motor config, and then use switch modules to setup custom gcodes to control those pins separately.

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Courage et bonne humeur.

[Christopher]

It's really convenient for cartesian type printers. 

Sailfish, Marlin and Reprap firmware allow it so why not smoothie ? 

How would you configure the switch module ? I'm using the standard pins and ports.

[Arthur Wolf]

You just configure one switch module for each driver ( http://smoothieware.org/switch ) with any Gcode you like as the input, and the enable pin as the output

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[Christopher]

Thanks Arthur. I'm always a bit uncertain, which options/configurations smoothie actually needs. That's why I'm asking! Listing all the (switch)options is good, but not always helpful.

What's the reason to not include for example:" M18 X E0 " out of the box ? Seems kinda standard. 

[Arthur Wolf]

That's planned, we just don't have it yet

On Sat, Oct 15, 2016 at 10:49 PM, 'Christopher' via Smoothieware Support <smoothiewa...@googlegroups.com> wrote:

Thanks Arthur. I'm always a bit uncertain, which options/configurations smoothie actually needs. That's why I'm asking! Listing all the (switch)options is good, but not always helpful.

What's the reason to not include for example:" M18 X E0 " out of the box ? Seems kinda standard. 

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[wolfmanjm]

It is on the TODO list, but it is by no means standard at all! 

The reason it was not done is it was really hard to do in smoothie which is much more highly structured than the arduino based firmwares

Last time I looked Marlin only supported disabling E separately.

NOTE that by using a switch to disable the motors they will not be enabled automatically when you start a move you will always need to manually enable or disable them before you print/

[wolfmanjm]

Ok it has been added to edge. you will need to wait for the nightly builds.

[Christopher]

Reading the reprap g-code documentation and knowing about this option for two plus years I assumed it was standard by now. 

Thanks for adding it wolfmanjm! Looking forward to it :) 

[wolfmanjm]

the reprap gcode docs specifically says that parameters are not supported by all firmwares, in fact only one firmware supported it. (now two).

[Christopher]

This sounded to me like like a pretty wide implementation : "Some firmware implementations do not support parameters to be passed, but at least Marlin and RepRapFirmware do"

Let's not argue about it! 

I think it's awesome how fast you picket this request up !!!!