Current Pickup and Spring Generator for Model Trains Gauge G (IIm) and Gauge 1.
Naturally you can use the spring generator not only for model trains...
Version 2 released (2018/02/05).
Enhancements for mounting options.
Version 2.1 released (2018/02/15).
In CurrentPickup.scad more design options.
In StackedBladesSpring.scad much more mounting options.
Most advantage: Size reduction of the spring box.
Version 3 released (2018/03/05).
Central mounting of the spring possible. Much size reduction. Easier installation.
See *.stl files 2 and 3
Version 3.1 released (2018/03/06)
Changes: Source code decorated with much more comments.
Minor change in horizontal wing size (~ 1mm).
Version 4 released (2018/03/25)
a) A second central mounting option added: The spring is orientated vertical. See the picture of Current_Pickup_Vertical_Front.stl.
This has the advantage of an easier adjustment of the tension of spring.
b) Until version 4 the blades were always arranged parallel to each other. Now you can define also a
spread angle for the blades. You can see an example for a spread angle of 10° in the Spring_Spreaded_V4.stl.
c) Adding much more comments in the StackedBladesSpring_V4.scad file.
Older versions of the *.scad file were removed from this thing. Version 4 covers them all.
Only the names of some variables were changed.
Version 4_1 released (2018/04/05)
Error correction: SpreadAngle <> 0 handling adjusted for bottom mount horizontal and vertical springs.
Version 4_2 released (2018/04/07)
Error correction for InitialSuspensionHub for vertical springs: Enhanced calculation for strange settings.
InitialSuspensionHub_Z set to 1mm instead of 1.5mm
MetalPlateHeight set to 1.
a) Allows an easier production of self made plates.
b) With a smaller height the springs can be positioned nearer to the axle(s).
Platform extender added: If you want to mount a spring behind the second axle, it may be that you need an extender so that the shoes of the pickup will not touch the wheels.
Pictures for vertical spring added.
Don't mount the pickup far away before the front wheels or behind the back wheels. In narrow curves the pickup loses contact to the rail(s).
Add some ballast to the coach or locomotive. One spring has ~ 30 g (~ 0,29 N) tension. But you have 2 of them.
Note: If you use switches or crossings you have to install 2 pickups on each side with a minimum distance of 6 cm.
Some improvement for the driven wheels: Mount a rubber band 70mm x 5mm