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Programming manual
CNC 8055
CNC 8055i
3.
AXES AND COORDINATE SYSTEMS
·M· & ·EN· MODELS
SOFT: V02.2X
Part dimensioning. Millimeters (G71) or inches (G70)
3.3 Part dimensioning. Millimeters (G71) or inches (G70)
The CNC allows you to enter units of measurement with the programming, either in millimeters or
inches.
It has a general machine parameter "INCHES" to define the unit of measurement of the CNC.
However, these units of measurement can be changed at any time in the program. Two functions
are supplied for this purpose :
• G70. Programming in inches.
• G71. Programming in millimeters.
Depending on whether G70 or G71 has been programmed, the CNC assumes the corresponding
set of units for all the blocks programmed from that moment on.
The G70 and G71 functions are modal and are incompatible.
The CNC allows you to program figures from 0.00001 to 99999.9999 with or without sign, working
in millimeters (G71), called format +/-5.4, or either from 0.00001 to 3937.00787 with or without sign
if the programming is done in inches (G70), called format +/-4.5.
However, and to simplify the instructions, we can say that the CNC admits +/- 5.5 format, thereby
admitting +/- 5.4 in millimeters and +/- 4.5 in inches.
On power-up, after executing M02, M30 or after EMERGENCY or RESET, the CNC will assume that
the system of units of measurement is the one defined by the general machine parameter "INCHES".
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