Sonntag, 27. Juni 2010

To Turntable or not...

I'm not getting happy with the Digital-Bahn decoder...
The most important part is the positioning of the bridge which seems to be very dependent of the motor condition.
You can get the positioning right with programming the slow part of the moving, but it is a snapshot of the motor characteristics at that time.
The original mechanics had a slot to run in to get an exact positioning of the bridge which is removed for this decoder type.

I invested a lot of time to get it right, but the slot is needed because without it the tolerance is 2 mm which is not acceptable to use in automatic mode.
I'm afraid that I will stop investing more time and money in this turntable project.

1 Kommentar:

  1. Hi Rob,

    the motor conditions should not have a so big influence. The black and white sektor wheel should give a better accuracy. May be that the reflex gate to detect the sectors is not exact enough adjusted. Or the LED is to bright and/or the phototransistor is to sensitive. In both cases may be that changes of resistor values give a better result. In rare cases is ist possible that black sectors reflect a part of the IR-light whereby an paint over of the black sectors with an "edding" can help.

    Best regards, RainerK

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