03-22-2015, 08:28 AM
Reinhard!
Yes i see your photo. The black motor seemed to me a Mashima brand. Also i have seen them in some of P2K and Athearn-Genesis switchers which are known to be smooth runners. But not all of the new can motors are really bad.
One of the simplest and quickest ways to judge a motor is turning it over manually with your hand.
Turn it over with your finger tips at the flywheel and pay attention to the cogging. No or at least very low cogging forces are better than high cogging forces.
Motors with high cogging forces are bad for model railroad purposes because the strong cogging is responsible for the jerky movements at low speeds.
Even in DCC mode with an decoder which has a very good Back-EMF goverment and with the PID parameters adjusted, those "Super-Coggers" are not running satisfacting at low speeds.
You can simply descibe switchers with cogging motors: "There is no satisfaction in the action!"
Lutz
Yes i see your photo. The black motor seemed to me a Mashima brand. Also i have seen them in some of P2K and Athearn-Genesis switchers which are known to be smooth runners. But not all of the new can motors are really bad.
One of the simplest and quickest ways to judge a motor is turning it over manually with your hand.
Turn it over with your finger tips at the flywheel and pay attention to the cogging. No or at least very low cogging forces are better than high cogging forces.
Motors with high cogging forces are bad for model railroad purposes because the strong cogging is responsible for the jerky movements at low speeds.
Even in DCC mode with an decoder which has a very good Back-EMF goverment and with the PID parameters adjusted, those "Super-Coggers" are not running satisfacting at low speeds.
You can simply descibe switchers with cogging motors: "There is no satisfaction in the action!"
Lutz