Tormach PCNC 770 - Spindle Control Mode; Built-In M-Codes

Chapter 7
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UM10350_PCNC770_Manual_0916A
Programming
It is an error if:
• Inverse me feed rate mode is acve and a line with G01, G02, or G03 (explicitly or implicitly)
does not have an F word
• A new feed rate is not specied aer switching to G94 or G95 canned cycle return level – G98
and G99
7.6.2.12 Spindle Control Mode – G96, G97
To set constant surface speed mode, program: G96 D~ S~
Word Denition
D~
Maximum spindle RPM. This word is optional
S~
Surface speed. If G20 is active mode, the value is interpreted as feet per minute.
If G21 is active mode, the value is interpreted as meters per minute
Example:
G96 D2500 S250 (set constant surface speed with a maximum rpm of 2500 and a surface speed
of 250).
It is an error if:
• S is not specied with G96
• A feed move is specied in G96 mode while the spindle is not turning
When using G96 (the most common mode of mill operaon), X0 in the current coordinate system
(including osets and tool lengths) must be the spindle axis.
To set RPM mode, program: G97
7.7 Built-in M-codes
M-codes interpreted directly by the operang system are detailed in the following table. For more
informaon, refer to each M-code denion secon later in this chapter.