MRMC MHC CLASSIC, Quick Start Manual

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MHC (Classic) v3.0 Quick Start Guide
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limit for one end of the desired track. If min and max are both 0 or set the
wrong way round then the robot will not move.
Change of Acceleration
Use this setting to smoothen the head movements and make them less
jerky. You can set it to a value between 0.1 and 1.0. 1 being no smoothing
and 0.1 being the most.
Scaling and direction
Scaling is the ratio between 1 degree on the software and how much the
motor needs to be moved. Usually it is best to leave at the factory default
setting. If this is set incorrectly the head will either move very slow or
very fast, so it needs to be just right which is what the default is.
You can reverse the direction for the selected axis by inverting the value
in the text field. To do that add or remove the minus sign (-) in the
beginning of the number to invert the control of the axis.
Backlash offset
This setting compensates for backlash in the motor during Goto moves
and manual control. Backlash is when you have a bit of “wiggle room”
usually between where gears are meshing the axis can be moved a little
without the motor actually moving. Normally 0 is the best setting unless
you have problems with backlash.
Override and restore limits
OVERRIDE LIMITS will temporarily disable these settings if you want to
ensure the robot is not stopped because of a limit problem. Doing this
Important
One thing is different with a Serial lens axis (i.e. focus, zoom or iris),
specifically when using a serial lens. It’s important to have the
minimum position set to 0. For the maximum position, move the
lens axis to the farthest marker and use this position as max. If the
range is outside these values, you can have a situation where MHC
thinks the lens is moving and you will see the axis position change
however the lens itself is rejecting the input from MHC and just not
moving. Only when the axis position falls within the acceptable
range will the lens move – it can be different depending on the lens.