M291 and using endstop for confirmation

ericlmccormick

I am using motor stall for X & Y and a probe for Z which leaves all my endstops open for reuse. I have also setup a macro for filament swaps. I have the hotend move to a specific area above the build plate, heat to 230, extrude a little then retract a lot. Then I use M291 P"Click ok" S1 to wait, then I have it extrude enough to clear the old filament out and have clean filament out the nozzle, then shut down.
I would like to use an endstop as a trigger to continue from M291 instead of having to trigger from my computer/phone. Is this possible?

jay_s_uk

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fcwilt

@ericlmccormick

Why the M291?

How would you use the endstop?

I'm a bit confused.

Thanks.

Frederick

ericlmccormick

@fcwilt M291 with S1 allows you to pause your gcode and wait for an input before continuing. The code seems to work out well, but I have to go back to my computer and it would be better to hold the filament in the extruder and push a button the printer.

fcwilt

@ericlmccormick said in M291 and using endstop for confirmation:

@fcwilt M291 with S1 allows you to pause your gcode and wait for an input before continuing. The code seems to work out well, but I have to go back to my computer and it would be better to hold the filament in the extruder and push a button the printer.

Thanks for the explanation.

Because there are times when "local control" is desirable I ended up installing PanelDue units on all my printers.

The problem in your case is executing some code while the M291 is waiting for a response.

A M292 would do it but how to execute it? PanelDue units use that to clear the M291.

Let me give that some thought.

Frederick

ericlmccormick

Would it make sense to replace M291 with the following 2 lines?

M950 J1 C"e1stop"
M577 S1

fcwilt

@ericlmccormick said in M291 and using endstop for confirmation:

Would it make sense to replace M291 with the following 2 lines?

M950 J1 C"e1stop"
M577 S1

Try it and see.

How would you know that the button needed pushing.

Perhaps a LED mounted with/near the button turned on/off in code?

Frederick

ericlmccormick

@fcwilt I have 24V LED strips 2 of my 3 printers, but easy to add it to my 3rd. I use E1 heater for the LEDs, putting them on a fan output cause voltage drop on the fans.

But since I have the hotend shoot out a little filament before a retraction, having the hotend in a given place above the build plate with a little filament under would signal it has done what it needs and needs me to swap out the filament and hit the button to continue the process.

I have also setup a macro for replacing my nozzle and this would be a good way to tell the machine I am done with the nozzle swap and to start cooling off or go into a stand-by state.

I will have to check out this code a little later today.