Home made yoke

[davemuir]

Hi
if anyone is looking for a reproduction 737 yoke handle johns the man for the job .
i received from john a wooden kit consisting of various sheets of wood and when glued together
and covered with filler, the end product looks great ,it's heavy and feels like the real yoke as aposed to using the plastic ch yoke ,
trim switch was from simparts.de and counter is a real one .
regards
dave

[skino]

I want one too. Do you have a link?

[John_B]

Shucks .......Thanks for the accolade Dave here's a pic of my prototype


John

[John_B]

OUCH I have just seen the price of the Simparts trim switch...I think I need to put on my drawing hat and fire up the laser !!!!!!

John

[muffyman]

Hi Dave its I from the gold coast in Australia how r u mate r u still on skype? cheers Ian

[muffyman]

Hi Dave I'm wanting to run a trim wheel using a dc motor wired into my trim switch do u know how I could achieve this cheers Ian

[John_B]

Can I jump in here with and an idea or two?.

The problem with using a dc motor is knowing the trim's position a sensor would be needed to send position info to the sim.
A stepper motor has its own driver and the software keeps track of its position by counting the pulses it sends in which direction.

However in my experience steppers can be tricky little buggers to set up as it needs to "step" round for each pulse and not drop/lose any steps or for that matter gain any.

To keep track of a dc motor some form of sensing needs to be added for example an encoder with an opto switch or a magnet and switch (if you have a scrap printer all the mechanics are in there).
Actually driving the trim wheels depends on space and set up gears/belt or even direct drive.

Or have I missed the question?

John

[muffyman]

Can I jump in here with and an idea or two?.

The problem with using a dc motor is knowing the trim's position a sensor would be needed to send position info to the sim.
A stepper motor has its own driver and the software keeps track of its position by counting the pulses it sends in which direction.

However in my experience steppers can be tricky little buggers to set up as it needs to "step" round for each pulse and not drop/lose any steps or for that matter gain any.

To keep track of a dc motor some form of sensing needs to be added for example an encoder with an opto switch or a magnet and switch (if you have a scrap printer all the mechanics are in there).
Actually driving the trim wheels depends on space and set up gears/belt or even direct drive.

Or have I missed the question?

John

Hi John
Thanks very much for your input, I currently have a none motorized 737 throttle quadrant, and I have setup a small dc motor with a belt drive inside the unit which when connected to a 6 volt battery works fine, what I would like to do is connect it to the trim button so when I trim forward the trim wheel will turn forward and the same when I trim back and when when I release the trim button have the motor stop not sure how to achieve this cheers Ian

[John_B]

Hi Ian
Got ya

Ok to do this with just a switch the switch needs to be a dpdt (double pole double throw)
hang on will knock up a diagram it will be easier,.
John

[John_B]

Here ya go ian

John