Cessna Trim Wheel
This page is split into three main sections:
Parts Guide
Print Guide
Build Guide
The ultimate printer I can recommend is the Bambu Labs X1 carbon with AMS or P1P if you have deep pockets. ($1200). It's a massive leap forward in 3D printing, with excellent quality and impressive speeds. It's pretty much press print and go as the software and hardware do the calibration before each print.
A manual designed trim wheel for the Cessna. It utilises a single 10K ohm pot supported by 3 604ZZ bearings. A very simple build and the unit features a built-in indicator that is run from the trim wheel position. No servo is required. I would suggest connecting the single pot to an Arduino micro with the joystick sketch.
General Information:
Build Guide
Click on image for more details
STEP:
1
Insert the 10K Ohm Pot into the lower orifice of support (4)
Click on image for more details
STEP:
2
Place the securing nut over the pot and tighten
Click on image for more details
STEP:
3
Place the 13T spur gear (8) onto the splines of the pot. Ensure the pot is set to the mid position.
Click on image for more details
STEP:
4
Insert the bearing (604ZZ) into the indicator spur gear (6)
Click on image for more details
STEP:
5
Place the Indicator spur gear (6) on the support (4.) Ensure the indicator arm is perpendicular to the base of the support.
Click on image for more details
STEP:
6
Place the 40T spur gear (7) on the shaft. Ensure the brake block is in line with the indicator. They should face away from each other at exactly 180 degrees.
Click on image for more details
STEP:
7
Insert an 604ZZ bearing into the 40T spur gear (7)
Click on image for more details
STEP:
8
Insert an M4 x 20mm dome head screw to secure the gear.
Click on image for more details
STEP:
9
Insert a 604ZZ bearing into the Trim Wheel (9)
Click on image for more details
STEP:
10
Place the Trim wheel into position over the indicator spur gear.
Click on image for more details
STEP:
11
Insert an M4 x 45mm dome head screw through the RH support (5) into the trim wheel and indicator gear, finally tightening into the LHS support (4)
Click on image for more details
STEP:
12
Place the backplate (1) onto the base of the supports (4 & 5) and secure them with Qty 6, M4 x 14mm countersunk screws
Click on image for more details
STEP:
13
Place the main body (2) over the unit and seat it onto the base (1)
Click on image for more details
STEP:
14
Insert Qty 4, M4 x 14mm countersunk screws.
Click on image for more details
STEP:
15
Place the faceplate (3) over the trim wheel
Click on image for more details
STEP:
16
Secure the faceplate to the main body with Qty 4, M4 x 10mm dome head screws
Click on image for more details
STEP:
17
I suggest wiring the pot to an Arduino micro with a joystick sketch. There are only three wires needed: Left pot pin+5v,
centre pot pin - Arduino input
Right pot pin - GND
Configure the axis as the elevator trim axis.