engine speed control

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engine speed control - No low speed control

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JohnR		#1 Posted : 27 April 2025 16:32:20(UTC) Retweet
Joined: 27/04/2025(UTC) Posts: 1 Location: Texas, Houston		I am powering a loop of Rokuhan track with the RC 03 powerpack. I have three Marklin engines and one responds normally to the speed control and will go from stopped to fast as the speed dial is rotated. The other two engines move off at a medium speed at even the lowest setting of the control and can only be stopped by setting the direction control slide on the powerpack to the center "off" position. Is this normal behavior for some engines or is there a way to have low speed control with them?

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ciderglider		#2 Posted : 27 April 2025 17:15:32(UTC) Retweet
Joined: 09/07/2012(UTC) Posts: 66 Location: Leicestershire		The motor in the loco plays a big role in this. The older 3 pole motors are not great. The later 5 pole and coreless motors are more amenable to low speed running with the Marklin controllers. The other approach is to use a more sophisticated (PWM) controller, but these don't play nicely with coreless motors. (I am not familiar with your Rokuhan controller.)

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Poor Skeleton		#3 Posted : 27 April 2025 20:37:16(UTC) Retweet
Joined: 09/10/2015(UTC) Posts: 581 Location: England, Cambridge		Originally Posted by: JohnR I am powering a loop of Rokuhan track with the RC 03 powerpack. I have three Marklin engines and one responds normally to the speed control and will go from stopped to fast as the speed dial is rotated. The other two engines move off at a medium speed at even the lowest setting of the control and can only be stopped by setting the direction control slide on the powerpack to the center "off" position. Is this normal behavior for some engines or is there a way to have low speed control with them? Yes, this is pretty normal. Even with Marklin's own controller the locomotives with coreless motors tend to move even on the very lowest setting. I'd add to that; in my experience, even two identical models can have very different running characteristics - low speed behavious, top speed etc! Cheers Chris

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