Download MicroMiniTM Controller MC-4B Series User Manual

Section I
The MENU/SELECT key works the same way for the settings that follow.
• SET Sense OF READING
Pressing the FWD key again changes the screen to read:
Reverse Display
>Normal Display
The default is for stage positive carriage motion to be toward the forward end.
Changing the selection by pressing the MENU/SELECT key inverts the sense, so that
motion toward the forward end reads as negative and motion away from the forward
end reads positive.
• SET ENCODER POLARITY
Pressing the FWD key a third time changes the screen to read:
Reverse Encoder
>Normal
If your stage motor has reverse polarity or reversed encoder channels, the motor will
run out of control because of the resulting positive feedback. Changing this setting
should correct that, so the motor runs in the expected direction, at the expected
speed.
• SET BACKLASH DIRECTION
Pressing the FWD key a fourth time changes the screen to read:
Rev Backlash
>Normal
Normally, stage carriage motion toward the forward end of the stage is the most
accurately read from the motor's encoder. Motion in the opposite direction therefore
entails backlash. To use a stage whose backlash direction is the reverse of this,
press MENU/SELECT to select Reverse Backlash. For more about backlash, refer to
the description of “Backlash Compensation” below.
[Backlash Indication: In the MC-4B Servo 1000, whenever the stage is moved in the
reverse (out of the "windup") direction, backlash is indicated in the display by a leftpointing arrow. This arrow begins as a "<" when the backlash is a single count,
changes to double thickness at two counts of backlash, then fills to a solid triangle
when the backlash exceeds two counts.]
• SET DIRECTION OF JOG KEYS
Pressing the FWD key a fifth time changes the screen to read:
Rev Dir Key
>Normal
Sometimes it may be convenient to reverse the direction the stage carriage moves in
response to the direction keys. Pressing MENU/SELECT selects Reverse Direction
Keys, so that the FWD key moves the carriage away from the motor and the REV key
moves it toward the motor. (This applies to all linear stages except the MM-3M-ST.)
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