Digitalizing a small loco

[modelsof1900]

Wayne, thanks for your comment and your considerations. I will try to make some remarks to the frame construction.

First, the frame is soldered in its basic construction. And second, the shiny areas left and right of my cutoffs did I make with a cylindric cutter in order to remove wide placed epoxy resin so that I could insert my insulating plastic blocks where steel tubes for the brass pickup bolts are inserted.
I think the original installation was a very common assembly with an open can motor and a directly connected gearbox by a rubber tube, maybe. The proof for existence of a gearbox is the great cutoff in bottom plate - and all axle bearings were sprunged.



You see here that a new shaft for the worm whell is epoxied between the rear spring hangers of second axle, and what you see is the epoxy resin which fix the shaft and not oozed out fat! In connection with the worm wheel is a smaller tooth wheel (behind and not visible) which drives the original tooth wheel on axle that was moved onto a side. Here you see the whole tooth wheel assambly on this picture in its modified condition.



Look also the voluminous epoxy filler at right frame end, however this is only a filler and not a basic connection of frame. (I milled out it again because I needed a breach for electric wires.)
Now, with fixing the worm wheel all other parts must be adjusted after the new position of shaft for worm wheel and the added idler wheel. First the motor, you see on first picture the motor epoxy fixing on underside. And with this fix positioned gear "main" shaft also all axles must be fixed, absolutely. So the previous owner fixed the bearings in frame by epoxy - 1 mm lower then the original position and together with all bearing springs in their original position in frame!
What I should write is that the previous owner worked very exactly in all respects. All tooth wheels and the worm have a very fine clearance. I think also that he positioned the frame whit all axles on an absolute flat working plate while hardening of epoxy because all wheels and really all are set absolute correct on level track without differences in high. Here I should give him a great compliment for a very solid work - with relativey unorthodox methods. But it works!



On this picture you see the high differences of lower edge of frame and those of bearings and this has not a reason by free moving bearings and the inside mounted springs. No, the bearings ase fixed all in this position and thereby the loco stands one millimeter higher now (or 0.04") as the model in its original condtion. This is not a problem, also with this change is this loco still a very small model. And it runs very, very well!

Wayne, if you will like to know more about this model, please ask again and I try to give you answers. Only I can't make new pictures in moment because the loco is complete assembled, however a new chance will come in next time, I think. Thanks for your interest!