01-09-2018, 08:40 PM
Good question, Mark. My reference to torque is strictly seat of the pants. With no supporting evidence, using the smaller diameter drive pulley allows more DC current flowing through the motor for the same RPM and SFM. I am really more interested in the slower speed than in power.
I have reached a conclusion working with both the Viel and the Kally: I don't see much sense in converting the Viel to variable speed without also converting to the 3 3/4” drive pulley. The speed advantage is just better with the smaller drive pulley. For those who occasionally want the full speed of the fixed motor with the six inch pulley, the high end of the variable speed motor is faster than the fixed motor. It can equal the SFM of the fixed motor.
Comparing the stock and modified versions of both, I think the modification process offers more for the Viel than the Kally. The Kally comes from the factory with a smaller drive pulley and lower SFM. It also comes with a fixed, but very strong motor. Switching the drive pulley on the Viel gives the smaller pulley advantage, however, it requires the variable size motor to fit the Viel frame.
I am looking forward to working with both machines.
Ken
I have reached a conclusion working with both the Viel and the Kally: I don't see much sense in converting the Viel to variable speed without also converting to the 3 3/4” drive pulley. The speed advantage is just better with the smaller drive pulley. For those who occasionally want the full speed of the fixed motor with the six inch pulley, the high end of the variable speed motor is faster than the fixed motor. It can equal the SFM of the fixed motor.
Comparing the stock and modified versions of both, I think the modification process offers more for the Viel than the Kally. The Kally comes from the factory with a smaller drive pulley and lower SFM. It also comes with a fixed, but very strong motor. Switching the drive pulley on the Viel gives the smaller pulley advantage, however, it requires the variable size motor to fit the Viel frame.
I am looking forward to working with both machines.
Ken