[NaRbO]

Hi, We have 2 fadal machines, both 1994 models, a 15xt and vmc10. The spindles i'm assuming are both 10K grease packed non-locking draw bar, also there is no high low belt adjustment, just a 1:1 pulley arrangement, based on the depth of the belleville spring pocket is 4.25 deep. Fadalcnc.com says the 10ks are the only ones with that depth. In the setp menu, the rpm is set at 3750 with a rpm factor of 10 for the 15xt and 6 for the vmc 10. I haven't tested the 15xt yet, but on the vmc 10 the rpm won't let me go above 3750. Is there any way to change this? And why would they have set it up like this?

[FastFieros]

I hope someone helps in your answers that can also help me in my same questions once upon a time....

I have a VMC15 (1993) This machine has a 7500 spindle, and Baldor Sweodo drive. It will not go beyond 2500 RPM on the MDI input M3S2500.... I can however crank it to 200% and get 3750 out of it.

If I go to SETP and change the spindle type, and ratios... I can get input that same 2500 in MDI and the spindle is turning 3750 at 100% spindle, and then 7400 at 200% spindle speed.

Well, I have been using the machine for 2 months now at the limit of M3S2500 and then if I really need higher, just crank the spindle percent.

Now to the belt you describe. The VMC15 has a single belt also. However, it has a 2 pulley setup for a low and high... The low side is where it is, and I have tried the high side, but decided that the higher torque on the low side was going to suit my needs since I do some rigid tapping. The belt is really a pain to move also since the cover has to be removed, and the motor mount bolts loosen, move motor, tighen, replace cover.

I have a 7500 grease pack spindle according to some at Fadal I have emailed. Inside my pendant door is the specs of the machine, and it lists 10k spindle, but I dont think it is.

[Edster]

I had the same double pully setup you have. The belt was in the low range when I got it and the control was set for 7500. So it said it was at 7500 and it was really 3750? a real bummer to set feeds and speeds

I ended up replacing the pullys with the newer style with the 1:1 and the cogged belt. It used to slip the belt with the old pully setup with the belt in low range with a 1/2-13 thread roll. It sounded like a car crash when it slipped the belt.

[NaRbO]

In the set parameters, it lists the spindle drive as a 3750rpm wye/delta drive. there are 2 options for 10k, one is high/low, the other is 3-step.