Hi All.

Ive had this machine from new, only snag ive got with it is x dia varies slightly.
Ive spoken to many haas engineers and they tell me its to do woth the thermol setting, they did change some settings in the 1st month of me having machine as x dia used to change upto .005
I find now it changes .001 now and again and they tell me all the haas cnc lathes do this.
Sounds silly but if i get something with a.0005 tol i have to put it on my mazak QSH10 cnc lathe as this machine is so stable.

Baring in mind my mazak is over 25 years old and kills the haas for accuracy.

This would put me off buying another haas as you can imagine i waste so much time checking parts to make sure it hasnt changed and the amount i have to throw out, just not good.
My single spindle cam autos hold better tolerance than this SL20 and they are 50 years old + lol true though


Anybody else suffer from x dia changing??

Thanks

Hi All.

Ive had this machine from new, only snag ive got with it is x dia varies slightly.
Ive spoken to many haas engineers and they tell me its to do woth the thermol setting, they did change some settings in the 1st month of me having machine as x dia used to change upto .005
I find now it changes .001 now and again and they tell me all the haas cnc lathes do this.
Sounds silly but if i get something with a.0005 tol i have to put it on my mazak QSH10 cnc lathe as this machine is so stable.

Baring in mind my mazak is over 25 years old and kills the haas for accuracy.

This would put me off buying another haas as you can imagine i waste so much time checking parts to make sure it hasnt changed and the amount i have to throw out, just not good.
My single spindle cam autos hold better tolerance than this SL20 and they are 50 years old + lol true though


Anybody else suffer from x dia changing??

Thanks




When I had a machine shop, I would keep a 'warm-up' program in the controller. Every morning, I would load the program on my cnc mill and lathe and let them run for about 15 minutes before cutting my first part. Just a thought.

Typical, Our new SL-10 is .004 small EVERY morning. In X never in Z. Thermal comp is weird. I don't use it anymore. It only gave me .002 & I need .004. I use a warm up prog & then check the 1st part. put -.004 (every day) in the tool wear & all is good. Depending on ambient temp it takes about a hour or so to get back to where it was the day before. By then I'm changing inserts........I'm in FLA without A/C. We'll see what the "cooler" temperature brings. A real pain if the tolerances are tight. :=(

Well that is true about the 10. I obviously have a good setting because we have not changed it. I have noticed that when I run a lot of parts one right after the other I must check from time to time as required by our papaerwork QC requirements. I check critical dimensions. It will move some if it cools down so sometimes I guess I do back it off when it is close tolerance. I know when it is good you keep it warm by keeping it running without and downtime between parts. I have stuck to this principle on Mazak and Haas. I have been told these Haas don't need warmup period. I have seen such persons also running warm up programs on occasion. Its funny.

odd, on the SL20s i run i can puke out parts all day, opt stop, estop off, come back the next morning start it up, let it pop out a part and usually right where i left it the day before maybe a .0001 or so change.