Table of Contents

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).

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Components

Repository path

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

Assembly highlights

None.

Assembly Guide

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

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

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

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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.

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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.

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

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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.

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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

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

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

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14. Route cables through and attach throttle 2 p1

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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

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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

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

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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)

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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.

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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.

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

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