Option to disable z and/or xy homing

[johnboiles]

This PR provides an option to disable homing on the Z at the beginning and end of the generated GCode as well as an option to disable XY homing at the end of the generated GCode.

My machine (a MPCNC) doesn't have Z endstops -- so it's unable to position itself correctly with machine coordinates on the Z axis. That means the G53 G0 Z-10 at the beginning of the GCode and the G53 Z-10 at the end of the GCode (where properties.machineHomeZ = -10) will cause the machine to go to a random Z height, sometimes causing a collision with the workpiece.

Additionally, sometimes when making a cutting multiple small pieces, I don't want the machine to move away from the workpiece at the end of the GCode. In those cases, it's helpful to be able to disable XY homing as well.

[johnboiles]

I also added the option to disable XY homing here

Should I include that in this PR?

[Strooom]

Yes, looks usefull, I will merge it. Thanks! P Op za 18 jan. 2020 om 20:45 schreef John Boiles <notifications@github.com>

I also added the option to disable XY homing here <johnboiles@6a84cec> Should I include that in this PR? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#22?email_source=notifications&email_token=AD5KOZICPPYVFO37DD3DMTLQ6NL5HA5CNFSM4I6HO7ZKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEJKAPUQ#issuecomment-575932370>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AD5KOZKA6HEM3FP2V2SYSSLQ6NL5HANCNFSM4I6HO7ZA> .

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[johnboiles]

Easy for me to just push it up here. I'll update the PR description.