Simchair MKIV collective twin throttle lever body with tactile mark detents

This manual describes the process of building a twin throttle lever body, with interchangeable heads, and a physical idle-stop detent latch. This manual was ported from the MKIII version, so you will see the MKIII collective base in the pictures. (Please ignore this).

• 1 x 200x10x10mm aluminum square pipe
• 1 x 105x10x10mm aluminum square pipe
• 8 x M3x30mm screws and nuts
• 1 x M3 x 35mm screw and a nut
• 2 x M4x80 bolts
• 2 x 16K1 linear 10K pots

simchair4_models\printable components\peripherals\helicopter\collective lever\b_lever bodies\single throttle

None.

1. Assemble the collective base MKIV using a 200mm piece of 10x10mm aluminum piping.

2. Install the decorative cover onto the 10mm tubing.

3. Press-fit an M4 nut into the socket in the throttle 1 frame part 1.

4. Insert a potentiometer into throttle 1 frame p1.

5. Put the throttle frame part 1 onto the 10mm tubing. Drill holes in the 10mm tubing, through the holes of the frame part 1.

6. Press-fit nuts into their sockets, insert 2 M3x30mm screws.

7. Route 4-wire I2C cable and a 3-wire pot cable through the lever. This step may require some patience depending on the wires being used.

8. Solder the pot wires, and route the I2C cables through the cable channel, in the throttle 1 frame part 1.

9. Turn the pot fully to the left, then just a notch to the right. Put the throttle grip on (if required, make the hole a bit wider, or squeeze the pot knob a bit, with pliers) in a way, that it will be in “Fully Open” position (See the picture below). Please make sure that the pot is able to rotate freely.

10. Insert a piece of aluminum pipe into throttle 1 p2; drill holes and insert screws.

11.Route wires through cable channel and press-fit throttle1 p2 onto throttle 1 p1

12. Tighten throttle 1 frame parts together with m4x80mm screw, choose a straight one

13. Press-fit m4 nyloc nut to throttle 2 p1

14. Route cables through and attach throttle 2 p1

15. Drill holes, insert screws into throttle 2 p1

16. Pull throttle 2 pot wire out of the cable channel and solder it to the throttle 2 pot

17. Attach throttle 2 grip

18. Insert the aluminum pipe into throttle 2 p2; drill holes and insert screws

19. Pull I2C ribbon cable through throttle 2 p2 and attach throttle 2 p2

20. Fix throttle 2 halves together with an M4x80mm screw

21. Pull a piece of ethernet cable through the I2C connector part, cut and solder I2C ribbon cable wires to it

22. Solder the 4-wire I2C cable to an Ethernet cable.

  ETHERNET WHITE-ORANGE -> I2C HEAD CABLE WIRE 1 (+5V)
  ETHERNET ORANGE       -> I2C HEAD CABLE WIRE 2 (GND)
  ETHERNET WHITE-GREEN  -> I2C HEAD CABLE WIRE 3 (SCL)
  ETHERNET BLUE         -> I2C HEAD CABLE WIRE 4 (SDA)

23. Route an Ethernet cable through the hole in I2C connector cover part.

24. To secure the Ethernet cable in its place, use some hot glue.

25. Put the I2C cable housing onto the lever.

26. Solder the cables to your Arduino Pro Mini board, as follows:

  THROTTLE POTS AND I2C HEAD CABLE +5V  -> Pro Mini VCC
  THROTTLE POTS and I2C HEAD CABLE GND) -> Pro Mini GND
  THROTTLE 1 POT SIGNAL                  -> A1
  THROTTLE 2 POT SIGNAL                  -> A2
  I2C HEAD CABLE SCL                   -> PRO MINI PIN A5
  I2C HEAD CABLE SDA                   -> PRO MINI PIN A4

27. Put the lid onto the housing, and secure it with 4 M8x70mm screws.

28. Please check that all of the cables fit snugly inside the enclosure, and nothing touches the magnet. Then you can close the hatch.