THORLABS KBD101 User Manual page 54

Chapter 6
Hardware Limit Switches
These parameters are inherent in the design of the associated stage or actuator.
Default values are loaded on boot up and are not adjustable. The parameters notify
the system to the action of the switches when contact is made, i.e. Rev Switch or Fwd
Switch as required.
Switch Makes - The switch closes on contact
Switch Breaks - The switch opens on contact
Ignore/Absent - The switch is missing, or should be ignored.
Not Applicable - Limit switches are not applicable.
Motor
These parameters are used to set the 'resolution' characteristics of the DC motor
connected to the selected channel. The resolution of the motor, combined with other
characteristics (such as gearbox ratio) of the associated actuator or stage,
determines the overall resolution.
Steps Per Rev - The number of encoder counts per revolution of the DC servo motor
(minimum '1', maximum '10,000').
For linear stages (e.g. DDSM100) this parameter is set to '1' and cannot be adjusted.
The Gearbox Ratio parameter is applicable only to motors fitted with a
Gearbox Ratio - The ratio of the gearbox. For example, if the gearbox has a reduction
ratio of X:1 (i.e. every 1 turn at the output of the gearbox requires X turns of the motor
shaft) then the Gearbox Ratio value is set to X. (minimum '1', maximum '1000').
For linear driven stages with no gearbox (e.g. DDSM100) this parameter is set to '1'
and cannot be adjusted.
The 'Steps Per Rev' and 'Gearbox Ratio' parameters, together with the
'Pitch' and 'Units' parameters are used to calculate the calibration factor
for use when converting real world units to encoder counts.
The correct default values for Steps Per Rev and Gearbox Ratio are
applied automatically when the software is booted up.
Persist Settings to Hardware - Many of the parameters that can be set for the KBD101
series drivers can be stored (persisted) within the unit itself, such that when the unit is next
powered up these settings are applied automatically. This is particularly important when
the driver is being used manually via a joystick, in the absence of a PC and USB link. The
Min Pos, Max Pos, and Velocity parameters described previously are good examples of
settings that can be altered and then persisted in the driver for later use.
To save the settings to hardware, check the 'Persist Settings to Hardware' checkbox
before clicking the 'OK button.
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gearbox.
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HA0364T Rev C Aug 2022