Aerotech UNIDEX 600 Series, Руководство пользователя

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U600 User’s Guide Parameters
Version 1.4
Aerotech, Inc.
C-55
C.3.33. ScaleFactor
This machine parameter is used by the G151 code to scale axes. You may set the scale
factors independently for each axis via this parameter.
If you set this parameter to zero, it sets the scale factor to one, and resets the scale center
to zero.
C.3.33.1. Scaling Limitations
You cannot generate an ellipse from an arc by setting the ScaleFactor machine parameter
to different values on different axes. The controller will always try to draw a circular arc,
and therefore programs that draw legal arcs may generate circular radius errors when
different scale factors are used on different axes.
Negative scale factor values may be used for the ScaleFactor machine parameter (or
G151), which, will in effect cause mirroring, however, G2/G3 command polarity will not
be reversed, causing the wrong rotational direction to be generated. A negative scale
factor should not be used in this case. A positive scale factor should be used with the
G83-Mirroring command.
C.3.34. Type
This machine parameter specifies whether the axis is a linear or rotary axis. There are
three types of axis types.
0 – Linear axis.
1 - Rotary axis with modulo position rollover at 360 degrees.
2 - Rotary axis without modulo position rollover.
Distances and velocities that are not expressed in machine counts, will be expressed as
this parameter dictates. Distances for linear Type axis are in inches/mm (G70 / G71), and
distances for rotary Type axis are in degrees. Velocities for linear Type axes are in inches
or mm per minute (see G70 / G71), velocities for rotary Type axis are in RPM.
Many parameters have parallel parameters dependent on the axis Type. For example, a
rotary Type axis uses the HomeFeedRateRPM parameter, while a linear type axis uses the
HomeFeedRateIPM parameter.
Furthermore, rotary type axes may have their reported position modulo to 360 degrees.
Rotary type axes may also modulo absolute target positions to 360 degrees. Absolute
target positions include MOVETO targets, and G0/G1/G2/G3 targets when you are in
G90 mode. For example, G90 A500, where A is a rotary axis, moves to 140 degrees. Use
non-modulo rotary type 2 to prevent modulo position rollover.
The error “Parameter too high” can occur when setting this parameter from a CNC
program. The message may not refer to this parameter, but can also refer to the
MaxFeedrateIPM and MaxFeedRateRPM machine parameters, which are “reset”
when this parameter is set.