Hi all,
At present I'm limping along doing prototyping on a Cincinnati contourmaster (tracer with ball screws) converted to servos. The spindle has had new bearings once that I know of, 10-12 years ago.
At present I'm doing most of my cutting with .25 3 and 4 flute carbide. (dry)
I can just barely get away with slotting at 2200 rpm and 11 ipm with a doc of .05" or .025 x .7 doc. Not much for MRR. Anything more and it screeches. IRRC it used to have way less problems but then I was cutting at slower spindle speeds with HSS cutters and flood coolant. Spindle speed range is ~ 215 to 5650. Tool holding is a 40 taper with 1" of taper contact and an ER20 collet or solid .375, .625 and .75 single set screw tool holders.
In your experience with BP size machines what are reasonable expectations.
It has the 3 bearing spindle configuration common on BP's. Upgrades being considered are:
(1) go to 5 bear1ng config
(2) go 3 bearing or 5 bearing conventional or SiC
(3) spend real money and go to SK custom spindle
(4) change out 1 Hp for 2 Hp spindle motor
Comments, WAG's, SWAG's greatly appreciated.
TIA
At present I'm limping along doing prototyping on a Cincinnati contourmaster (tracer with ball screws) converted to servos. The spindle has had new bearings once that I know of, 10-12 years ago.
At present I'm doing most of my cutting with .25 3 and 4 flute carbide. (dry)
I can just barely get away with slotting at 2200 rpm and 11 ipm with a doc of .05" or .025 x .7 doc. Not much for MRR. Anything more and it screeches. IRRC it used to have way less problems but then I was cutting at slower spindle speeds with HSS cutters and flood coolant. Spindle speed range is ~ 215 to 5650. Tool holding is a 40 taper with 1" of taper contact and an ER20 collet or solid .375, .625 and .75 single set screw tool holders.
In your experience with BP size machines what are reasonable expectations.
It has the 3 bearing spindle configuration common on BP's. Upgrades being considered are:
(1) go to 5 bear1ng config
(2) go 3 bearing or 5 bearing conventional or SiC
(3) spend real money and go to SK custom spindle
(4) change out 1 Hp for 2 Hp spindle motor
Comments, WAG's, SWAG's greatly appreciated.
TIA