Software Support > Automated Projects

Setting up Mame / Mala with rotating CRT (Mrotate4)

<< < (20/22) > >>

DaOld Man:
Congrats!!
Thank you for the kind words, and I was very happy to help out.
Automatic rotation trumps manual (pushbutton), would you agree?

Cant wait to see the pics and the video of your creation.

Ropi Jo:
Done a bit of tidying with the wiring and was about to get a video but there was one major bug that was giving me a real headache.

The auto rotate is the main thing on the cab, and it has to work well, which is does... sort of. The drive is through a bundle of plastic gears out of a foot massager and they chatter and rattle so loud they ruin the whole effect. So today I ripped them out and thought how else I can go about this.

In my junk box I've got a few 24V linear actuators salvaged from some hospital beds. I can't use them as-is but I stripped one down and the worm drive is virtually silent and so smooth. Did a bit of modding to the drive and the cab and looks like a good bet. Too fast with 24V but seems about right with a 19V laptop supply. Trouble now is that the motor runs on after hitting the end stop. Got to come up with a simple electronic brake. A momentary relay that shorts the motor when power is removed from the motor, or something like that. Have to do a bit of thinking tonight.

DaOld Man:
Hmmm, so you are saying it is coasting? Can you move the stop switch to activate a little sooner?

Ropi Jo:
There's so much weight in the 25" crt it takes about 3/4 inch to stop.  I should be able to come up with a simple electronic brake using bits from the scrap box.

Ropi Jo:
The Mk2 rotate mechanics are now finished and the improvement is better than I could have hoped.

Instead of a rattly clunky jerky and generally crap system it's now smooth and quiet and simply brilliant (in my very biased opinion ;))

Also added the auto brake so it stops where I want it.

A bit of tidying up (again) and it's definitely video time.

So, the next question.... how do I get a vid on here?

Navigation

[0] Message Index

[#] Next page

[*] Previous page