Electric. Heckrollo successfully repaired

After my tailrollo didn't go any more I built this thing out today and successfully repaired it. Maybe that'll help some. So first measure whether electricity arrives. I had the control unit cracked, but nothing happened. Electricity has also arrived at the engine. So check the motor with multimeter for passage. If this is possible, then either the coals in the engine are broken (I can hardly imagine, since the engine hardly turns, if nevertheless you get the coals in the electric charge). With me, the coals probably have no contact and belong to ground up (engine turns scih always only a quarter of a revolution u. then back again. Start the drill tomorrow and grind the coals. When the engine was turned on with pliers, he went dananch once and twice.
I've read more often that the rollercoaster doesn't really get in. The way I see it, the black bars running on the blind in the rail are bent. Both poles must be straight and must not bend in the longitudinal direction (view from the top to the wide side). It can be re-shaped by means of vice and muscle force. Prepares for removal and bending on the plastic mounting in the rail. Presumably, someone pulled the blind while it was sunk. It's quite easy to bend. The round rod must also not be screwed tight, as fuse nuts hold the whole and otherwise the engine tortures itself. So screw it up and then release half to whole turn again. I hope I might have been able to remedy some of them.