Instruction Manual

212 Language Reference • Reference

Publication 1398-PM601A-EN-P — October 2000

WORDS

GEAR

Gear Motion

Purpose The gear statement is used to set and change the pulse to pulse ratio for electronic

gearing and step and direction following. If the gear is enabled, the ratio is changed

immediately to the specified ratio. If the gear is not enabled, the value is set but will

not affect motion.

Syntax GEAR = value

value The gear ratio can be set as a ratio of two integers, two vari-

ables, a single variable, a combination of a variable and a con-

stant, or as a decimal number. When a ratio of two integers is

entered, the numerator can be:

The value can be a constant, a nonvolatile variable Gn, a vola-

tile variable Vn, or a system variable.

Remarks If the value is not within the range of the numerator or denominator the GEAR value is

not changed. It should be noted that the range of value is different than the range of Gn

and Vn variables.

The current Feedback Configuration must have the Gear Input set to either POS2 or

POS3 for the gear statements to have any effect on motion.

Other motion can be “added” to gear. For example: If gear is enabled, and a MOVD =

1 statement is executed, the follower will advance 1 user unit relative to the master.

Note: The Gear ratio is not affected by the Scale or Scale2 parameters.