Stage start moving before stage up to load position

[CedricEsp]

Hello,

When I move the stage from well to well I try to bring the focus device to the load position between the move but the stage start moving before the focus is done moving up, here the function I use:

def move_load_pos(core=None, XY=None):
    #Move stage to load position
    previous_z = core.getZPosition()
    core.setZPosition(0)
    core.waitForDevice(core.getFocusDevice())
    #Move to XY position
    core.setXYPosition(XY[0] ,XY[1])
    #Bring the stage back down
    core.waitForDevice(core.getXYStageDevice())
    core.setZPosition(previous_z)
    core.waitForDevice(core.getFocusDevice())

Do you see any reason for that to happens? I could definitely add some time delays.

Thanks for all your help!

[CedricEsp]

To go with that, when I run an engine with multiple position and z stack, the first z image of every position is a little off, while if I add a time.sleep(0.5) before self._mmc.snapImage() it seems to fix the issue.

Here is the engine:

for event in sequence:
            
      cancelled = self._wait_until_event(event, sequence)
      
      # If cancelled break out of the loop
      if cancelled:
          break
      
      logger.info(event)
      
      self._prep_hardware(event)
      
      time.sleep(0.5)
      self._mmc.snapImage()
      self.img = self._mmc.getImage()
      
      self.write_data(event)
      
      self._events.frameReady.emit(self.img, event)
      
self._finish_run(sequence)

[ianhi]

So in prep_hardware there is a core.waitForSystem() which is meant to block until the hardware is finished moving. If that's not happening then you may want to consider opening an issue on https://github.com/micro-manager/mmCoreAndDevices

[tlambert03]

@CedricEsp let us know if you need any more help here. but I'll assume this is resolved for now

[CedricEsp]

Thanks @tlambert03, indeed the issue is with micromanager as suggested by @ianhi