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Post by brammy on Mar 23, 2021 8:02:10 GMT -8
Hi, I have a second-hand loco I got dirt cheap (I think) a TSU-1000 chip in it. The thing is jack rabbit even with V-start at 0. I've tried flattening the curve but it still takes off like a rocket. I also don't see setting for vMid and vHigh.
Any advice on how to slow it down? I am trying to speed match it to my other locos and I don't want to speed up the other ones.
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Post by NS4122 on Mar 23, 2021 8:57:22 GMT -8
Try adjusting the forward and reverse trim (CV 66 & 95) The default is 128 and using lower values will slow it down.
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Post by jonklein611 on Mar 23, 2021 9:35:15 GMT -8
28 speed step? Try changing it to 128.
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Post by brammy on Mar 23, 2021 9:54:31 GMT -8
Try adjusting the forward and reverse trim (CV 66 & 95) The default is 128 and using lower values will slow it down. I thought I did that to no effect. I will double-check. Maybe a factory reset is in order. |
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Post by nsc39d8 on Mar 23, 2021 11:02:36 GMT -8
I would try the factory reset and start the programming fresh. I had two older Atlas models that I installed the same type decoder in both
and one ran like you describe and no matter what I changed it still ran fast. Factory reset and start over and all was good with both locos.
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Post by Mark R. on Mar 23, 2021 19:38:21 GMT -8
You could also try increasing the start momentum as well (CV3).
Mark.
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Post by wjstix on Jan 17, 2023 11:32:43 GMT -8
CV2 only controls the amount of power at speed step 1. CV5 controls top speed (100% power) and CV6 the midrange (50% power). Try setting CV5 to 100 and CV6 to 50 and see if that slows it down.
Also, make sure the decoder is set to NOT use speed curves, but CV 2, 5 and 6. There should be one page in Decoder Pro showing the speed curve settings and another with the basic power settings.
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