Tormach PCNC 440 - Page 98

Chapter 7
98
UM10372_PCNC440_Manual_0221A
PROgRAMMiNg
It is possible, however, to control the axes so that, at all mes, each axis has completed the same
fracon of its required moon (as the other axes) and the tool maintains a straight line moon.
Arc and Helical Moon
Any pair of the linear axes (XY, YZ, and XZ) can be controlled to move in a circular arc in the plane
of that pair of axes. While this is occurring, the third linear axis and/or the rotaonal axes can be
controlled to move simultaneously at a constant rate. As in coordinated linear moon, these moons
can be coordinated so that acceleraon and deceleraon do not aect the path. If the third linear
axis moves simultaneously with arc moon, the trajectory of the controlled point forms a helix.
Feed Rate
The feed rate is the nominally steady rate at which the controlled point moves. Feed rates are
programmed by the operator. The interpretaon of the feed rate is detailed in the table below.
Motion Feed Rate
Coordinated linear moon of one or more axis (X-, Y-, or
Z-axis)
Inches per minute (G20 mode) or
millimeters per minute (G21 mode)
Rotaonal axis moon of one axis (A-axis) Degrees per minute
Coordinated linear moon of one or more axis (X-, Y-, or
Z-axis) with simultaneous rotaonal axis moon (A-axis)
This type of moon is usually programmed
in inverse me feed rate mode (G93)
Dwell
Commanding a dwell pauses the moon of the axes for a specic amount of me. The units in which
you specify dwell are seconds; a decimal value is used to get less than one second.
Work Osets
Work osets allow you assign an origin to any locaon within the work envelope.
Up to nine dierent work osets can be saved in the mill memory, but only one can be acve at any
given me. The default work oset is G54. The posion of each work oset origin is stored in the
Work Oset Table.
Tool Number
The tool number is used to idenfy a tool in a program. Each tool used in the program must have a
unique tool number between 1 and 256.
Tool Table
The tool table stores the tool diameter value and tool length oset value associated with each tool
number. The diameter value is used for cuer radius compensaon. The tool length oset value is
used to adjust the posion of the controlled point for dierences in the lengths among tools.