Feldbahnmodule with ship

[Franck Tavernier]

A real piece of jewelery! 

Franck

[fspg2]

@Chuck, Franck:  Thanks for your replies.

The round top seat for the checker plate cover of the float shaft consists of two machined brass rings.

Schwimmer_50 (fspg2)


Some boards will cover the inspection chamber later.

Schwimmer_48 (fspg2)



Schwimmer_49 (fspg2)



Schwimmer_51 (fspg2)



Now only a few drawings. They are intended to show how it goes on next.

Schacht-Abdeckung_001 (fspg2)



Schacht-Abdeckung_002 (fspg2)



Schacht-Abdeckung_003_jpg (fspg2)

[marc_reusser]

Cool. Now I am waiting to see you build those towers on each side! 

[Malachi Constant]

Yes!  This does look interesting ... looking forward to more!  -- Dallas

[Franck Tavernier]

Awesome ! 3D drawings are a good help for scratbuilding...

Franck

[fspg2]

@ Marc, Dallas, Franck,
Thanks for your comments!

Originally I had the idea to raise the bridge with two small spindle drives of former digital scan backs (1991).


Plexiglass_schlitzen_05 (fspg2)



However, the stroke distance is only about 4cm - but I need 8cm.


Recently I received a few rods, ball cages, bearings and threaded rods from a colleague. They were installed into large TV zoom cameras in the middle of 1980 years.


alte_Kamerafuehrungen (fspg2)



These parts have exactly the right dimensions.


The two guides of the old digital scan back were replaced by the new longer rods meanwhile. In addition I have drilled the holes of 6mm to 8mm diameter and adjusted the guide rods with 2mm socket head screws, as well as the upper aluminum plate was milled for a new ball bearing. The bearings on the ball cages now have a lift height of about 9cm - more than I need!


Hubmechanismus_01 (fspg2)



Hubmechanismus_02 (fspg2)


Only the spindle pole needs to be shortened by a colleague.


Temporary attempts to operate the cylinder with pneumatic were unfortunately unsuccessful. Pneumatic certainly has its charm!
To raise and lower the lift cylinders uniformly and slowly, have been unsuccessful with compressed air.
I was able run quite uniform the hub (with 2kg load), but there was some jerkiness when lowering. No matter how I adjusted the valves, it was not satisfactory.
So I will pursue the spindle rod solution instead compressed air. You can follow a disussion at bbf forum.


I hope to get the threaded rods shortened soon accordingly so that I can implement the following animation into the model.


Hubeinheit_Traeger_Montage_01 (fspg2)


A 6 mm circular aluminum plate will be raised and lowered by the spindle unit. The float tank becomes seated on the edge of the aluminum plate grooves. So I have a uniform support. The small wheels on top will not have to endure great loads.

[fspg2]

Today only a few pictures of the production of the 6mm aluminum plate. These will serve as a carrier for the lift cylinder.

Hubeinheit_Traeger_Montage_02 (fspg2)



Fixed up with Gudy 831 on to a MDF board, the 6mm aluminum plate got four 2mm holes . 2mm wire pins were plugged into those. Thereafter, recesses are milled for all the rods, which will pass through the plate later.

Hubeinheit_Traeger_Montage_03 (fspg2)



After that the plate was rotated to the backside. The four pins helped to put the plate to there position correctly.

Hubeinheit_Traeger_Montage_04 (fspg2)



Hubeinheit_Traeger_Montage_05 (fspg2)



Hubeinheit_Traeger_Montage_06 (fspg2)



Now all we need is the shortened spindle rod for final assembly.


Hubeinheit_Traeger_Montage_07 (fspg2)

[finescalerr]

Ho-hum, another example of a genius at work .... -- Russ

[Gordon Ferguson]

Ho-hum, another example of a genius at work .... -- Russ

Very true, but at least one of the holding screws is not straight ........ That makes me feel a little less overawed at the standard of craftsmanship and expertise

[Mr Potato Head]

Normally I am on the opposite side of Russ's opinion , but What the F!@# who the hell are you some mad scientist?
MPH

[danpickard]

Wonderful precision engineering.  Simply brilliant to be able to watch this entire project be created. 
Definitely the opposite end of the spectrum, when compared to the "usual" model railway approach to this mechanism, which might be more like a few scraps of MDF and some string pulleys 

Cheers,
Dan

[artizen]

Said it before - say it again - A...R...T   !!!!!!!

[Ray Dunakin]

Brilliant work, as usual!

But I'm a bit distracted by those bearing cages, or whatever they are, which you borrowed from an old digital scanner. I keep wondering, how the heck did they get all those ball bearings in their places??

[michael mott]

Very true, but at least one of the holding screws is not straight ........ That makes me feel a little less overawed at the standard of craftsmanship and expertise

Now Gordon! you have to realize that that screw was carefully placed at that angle to counteract the torques involved while trying to hold the beer can in the other hand..sheeesh I thought that was obvious!

Brilliant work on re purposing those linear bearings. Great 3D drawings as well.

Michael

[fspg2]

Thank you for your interest and kind words! I think the whole thing is just simple craft and the best diversion from work - just hobby :-)

Something for everyone:

Hubeinheit_Traeger_Montage_05b (fspg2)


Angled screw .... without screw .... straight screw :-)


Today I got back the spindle rods from my colleague – correct length now: 145mm.

Hubeinheit_Traeger_Montage_08 (fspg2)


It lacks the two lateral L-profiles at the image.