You are currently viewing our boards as a guest which gives you limited access to our forum and pics features. By joining our free community, you will be able to participate in the discussions, search the forum, send private messages, vote in polls, upload your own pictures and movies to the galleries or your personal album, and access many other special features. Registration is fast, simple and absolutely free, so sign up today! If you have any problems with the registration process or your account login, please contact support.
This is a tutorial on how to make your own home made slow motion switch machines. It will be done in 7 individual threads and contains 24 sketches. Directions may be more lengthy than necessary, but I hate directions when you have to guess what to do next.
The machines are designed for under table mounting (to a wood base) and remote operation, with contacts for control panel led indicators, which could be modified for power routing. The design is mine, but electrical help was gained from Kyle and Chris. Due to the unique diode switches, stall motors are not needed. I made 3 prototypes for testing. The last one was operated for 100 consecutive cycles without a glitch. My system is DC but these machines should work fine with DCC. The machine will throw a turnout in 9/10 of a second with the motor that I used. A lower rpm motor will lengthen that time.
The cost of making just one machine is not practical because of the inability to buy just one of some of the parts needed. An example of this is, Radio Shack sells diodes in a 10 pack for $1.49 but you only need 2 for the machine. If you have to order parts then the cost of shipping needs to be added in. More on cost later. The total cost of each machine drops drastically by making more. It took me a little over 2 hours to make the 3rd prototype but I’m sure that time can be reduced if you develop mass production techniques for making a number of them.
Building these machines is not for the beginning modeler and you should be proficient with soldering. Electronic experience is NOT necessary, but helps. How I built these is only my technique and is not written in stone. Many may decide to modify my design to suit their needs and material availability. I tried to build these as economically as possible by using common construction materials wherever possible.
Here is an outline of the tutorial with thread titles:
SCRATCH SLO MO SWITCH MACHINE PART I (WITH TOOL LIST)
SCRATCH SLO MO PART II (MATERIALS LIST AND COSTS)
SCRATCH SLO MO PART III (SWITCH PLATE)
SCRATCH SLO MO PART IV (PLASTIC PARTS AND WORM DRIVE ASSEMBLY)
SCRATCH SLO MO PART IV (SWITCH PLATE ASSEMBLY)
SCRATCH SLO MO PART V (LINKAGE AND INSTALLATION)
SCRATCH SLO MO PART VII (WIRING AND SCHEMATIC)
1. Drill press
2. Numbered drill bit set
3. Table or radial arm saw or hand saw
4. Small center punch
5. Plastic cutting knife (for scoring and snapping plastic)
6. Exacto knife
7. 40 Watt soldering iron, flux, and solder
8. Emory board or sandpaper
9. Small hammer
10. 2 pair of Needle nose pliers
12. Wire stripper
13. Wire cutters
14. 5 or 6 minute liquid epoxy
15. Silicone adhesive
16. Plastic solvent cement such as Ambroid Pro Weld or Tenax (do NOT use testors plastic glue)
17. Grease-em (MT)
18. 4-40 tap
19. Helping hands