New Spindle speed trouble, Lathe CAM < CSS, resolved>

[Measurement10]

Fixed an issue where Spindle Speed wouldn't go over 2000 RPM. Was a setting in CAM "setup". Set that value to 5000rpm but... now im having a new issue.

Spindle will only turn at 5000 RPM even though its set to 1500RPM in CAM and Gcode. Gcode attached.

Help much appreciated.

[suntravel]

G96 S1500.0 M3

This is 1500 m/min surface speed = 16464.3 rpm at 29mm diameter

G97 S1500 = 1500 rpm

Try G96 S150, that would be 1646 rpm at 29mm, going up to the max spindle speed if the diameter gets smaller.

For turning with carbide G96 S90 up to S200 are typical values.

Uwe

[Measurement10]

Ok, I was interpreting CAM's "CSS" value wrong. For some reason i thought it was RPM. It is in m/min. Explains everything.

Thanks again Uwe.

[suntravel]

CSS = constant surface speed

Uwe