Writing custom g-code

I have a script written to specify the shape of an object to be made from paste. In order to extrude the paste I have the syringe hooked up to an air tank, and am using the M106/M107 commands to start/stop extruding. I wrote the code to stop extruding after each layer so that the paste does not pool while the z-axis is turning. My problem is that the stop extrude commands are being executed before the printer finishes the moves written before the M107 (the stop command). If I can put some sort of delays between the final moves and the stop command maybe it could fix the issue, but at the moment I dont know if there are such commands.

Any ideas? Thanks for any input.

You could try using G4, which is code for "dwell". A dwell is the same thing as a delay.

M400 should do what you need, it waits for all queued moves to complete. If that doesn't work for you, try G4 S1 which delays for 1ms.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].