Definition files for single and dual head versions of Velleman Vertex
K8400 printer.
The machine uses printable coordinates x=0 to 200, y=20 to 200 and
parking position 200, 200 regardless of how many extruders you use.
Thereby the different machine_width for the two models.
The g-code can probably be improved.
USB connection not successful this far.
There was the problem that you'd click on pre-heat, so locally it would display the time-out. Then a package came in with the out-dated print status saying that the printer is not pre-heating, so the pre-heat was cancelled on Cura's side. Then the next status update came in saying that the pre-heat is now busy, so the pre-heat is resumed on Cura's side. So the button was flicking back and forth once after pressing. This commit makes Cura ignore any status updates that come while the put-request is still going on, because they may be outdated. It'll appear nicer to the user, mostly.
Contributes to issue CURA-3360.
If multiple instances of Cura are running or Cura is restarted, it now properly syncs the remaining pre-heat time with the printer, so that all instances display the proper time.
There's still a bug in here that pressing cancel has no effect the first time since the remaining pre-heat time is updated immediately from the printer before the command to cancel got through remotely. I'll see what I can do to amend that. Also, cancelling is not yet synced.
Contributes to issue CURA-3360.
These materials are hard-coded in the optimisation script, so the optimisation script didn't know that those materials were materials and this caused a chain reaction where in the end the profile could only override XML-settings.
