Safe max lathe spindle speed?

[dcrace]

Since you mention you are using the tailstock, another thing to keep in mind is the max RPM of your live center..We have a Riten live center we run up to 5000 RPM regularly.

[PBMW]

Good point on the center...
I have a 2004 SL10 that I run at 6000rpm all the time. I mostly use a 5c chuck on the machine.. I have found that if I clamp the max speed to 5500 or so it will improve the cycle time due to the speed at which it spools up. It is quite a bit slower to get to 6k that my Daewoo 220a Lynx

[cncsdr]

DOes the haas have a g50 if so limit it and move it up slowly until you feel comfortable with the spped you are running all in all Your cycle time will not be all that much longer. PLus you will feel safe I would rather feel safe and lose 2 or 3 seconds than standing on pins andneedles waiting for it to let loose.

[jderou]

The speed increase did not go without incident. I bumped the limit up to 4500 rpm. On the first couple trys I alarmed and said "spindle stalled". I modified a couple parameters to make the spindle acc/dec slower and that problem stopped (the amp meter still spends a lot of time pegged though).
Roughing cycle sounds a whole lot better throughout. Problem on the finish pass though, not a pretty finish. One guy compared the final part to a "ring-shank nail". I think either the chuck is not clamping square, or the center is not getting seated right. I've got a few more things to try.

Joe

[Edster]

IIRC to get to the Hours.

1) turn off parameter lock
2) go to alarm screen and type debug. A bunch of letters and stuff should pop up.
3) go to the position screen
4) page up or down until you get to the hours screen
5) make sure you go back to the alarm screen and re enter debug
6) turn on the parameter lock