Start of the machine

[Konstrukter1]

Does any one use warmup program? (That move x and y and z axis and go from 200 to 10 000 rpm in 30 min?)

[Paul_S]

If the Fadal is equiped with "cool power" this is not needed. Now I've noticed a .002 change over a about 1/2 hour to an hour on the z axis as a machine is warmed up during production. The shop just turns on the spindles for warm up. But most of the tolerances are +-.01 anyway.

[Konstrukter1]

I got cool power. So just turns on the spindles...that i allredy do.
You notice .002 change in z offset of tool? (that is about 0.05 mm?), so theoretycal with 30 min warmup, you get close to zero (inside of 0.01 mm tolerance).

[carbidecraters]

I run the spindles at 4500 for a couple minutes everyday before running any parts.

[Paul_S]

That .002 z change is only on a machine which does not have "cool power." We have 10 Fadals which can use a warm up. Two which don't, they have the "cool power." The "cool power" pretty much eliminates any need for a warm up cycle that I can see.


"Fadal's COOL Power™ refrigerated cooling system maintains a constant temperature and ensures positioning accuracy, reducing thermal growth and position repeatability problems, . . ."

[Konstrukter1]

Ok. Than is good just rotate a spindel for a little while, just for spindel bearings and go with the work.

Thanks

[OKUMAN]

I have several OKUMA mills with 15k spindles.Everyday starts with a warm up.
4k for 10 min. and 9k for 10 min.

[Paul_S]

What the shop does, is just turn on the spindles for warm up on all the Fadels and a Haas mill. On the two Fadals that have the "cool power" I have always told them just run parts. But I'm the second shift superviser, and day shift does what day shift does. So when my crew comes on, all the machines that are going to run are already running. The only time I would do a warm up when I was on day shift, was when I had to control a z depth to within .005 or less. Jobs which parts are counter sinked fall into that category. On a 100 degree counter sink +-.004 z will change the dia +-.010. So a .002 change is .005 on the dia.