http://linuxcnc.org/docs/html/gcode_main.html#sec:G96,-G97:-Spindle

Says that spindle speed is calculated on the basis of machine X
position and Tool Offset.

This appears to mean machine absolute position? With my machine X(abs)
runs from 0 to -130 but the G54 offsets are set to make that work
properly for machining.
CSS appears to work, with the speed hitting the max as the tool tip
reaches the middle of the work, so have I just got lucky, or is the
documentation not entirely true?

As a secondary question, is G96 affected by G7 (Diameter) mode? I am
wondering if I am running at half (or twice) the requested speed.
I guess it is an easy enough question to answer with a calculator.

-- 
atp

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