KLaFaille Posted September 8, 2011 Posted September 8, 2011 Sorry panelbuilder, I couldn't help myself. ;) YUXa1ssfEIU I'm guessing everyone knows what this is by now. 28VDC -> Static Inverter = 115V 400Hz AC -> ADI Converter + 26V 400Hz AC -> Two control transformers (synchros). Synchro outputs go to the ADI and control the ball. Red
Deadman Posted September 8, 2011 Posted September 8, 2011 Nice I kick your dog https://forum.dcs.world/topic/133818-deadmans-cockpit-base-plans/#comment-133824 CNCs and Laser engravers are great but they can't do squat with out a precise set of plans.
Mike Powell Posted September 8, 2011 Posted September 8, 2011 Sweet! Mike Powell www.mikesflightdeck.com www.mikesflightdeckbooks.com
KLaFaille Posted September 8, 2011 Author Posted September 8, 2011 (edited) Thanks! I have to give credit where it's due to Byrdling for pointing me in the right direction. Once he had mentioned that you could control it with synchros, I sat there and scratched my head a while thinking about it then took one that I had lying around and hooked it up and sure enough the ball moved. Now I needed some more synchros... I had a second (not an ARU-2B/A) Lear ADI of military origin made in 1960 that was brave to the end, even as I dremeled its once proud casing to get at its guts. Long story short, after three hours or totally stripping down the ADI, I had both of it's synchros and motor-tach-gens out and a bunch of nice spare parts, bearings, indicator movements, and gears that will come in handy down the road. Most importantly I came away with an even greater appreciation for the engineering and thought that went into these instruments. There is so much crammed into such a small package and just the way the thing works in general is super cool, especially considering it's all analog, no digital wizardry involved. Anyways, I took the two synchros from the now deceased ADI, put them in the vice, and wired them up. I made sure that everything is isolated electrically, and hit the switch. No smoke or flames! Apart from having the black leads mixed on one synchro it all worked right out the gate, I really couldn't believe it. Took the vid, and that's where it's at right now. As Byrdling stated, the synchros will be slaved to stepper motors to interface this in the future. Should work out good. I'll likely still build a couple of Mike's boards because a) I have more synchro instruments to drive and 2) I don't have any more spare ADI's lying around to tear apart. ;) Red Edited September 8, 2011 by KLaFaille
PanelBuilder Posted September 8, 2011 Posted September 8, 2011 Sorry panelbuilder, I couldn't help myself. ;) Red It's a beautiful thing, man. Colin
Mike Powell Posted September 8, 2011 Posted September 8, 2011 The PF35T-48L4 stepping motor is a good choice for gauge experimentation. It's often available as a surplus item. For example see:http://www.allelectronics.com/make-a-store/item/SMT-108/STEPPER-MOTOR-6-WIRE/1.html It's easy to drive with inexpensive electronics. I've used it in a few projects based on PIC micro controllers. I wouldn't be surprised to find that a stepping motor shield for an Arduino would do fine as well. The brass gear shown in the All Electronics picture is a 48 pitch gear which mates with the 48 pitch Delryn gears from Serv-O-Link http://www.servolink.com/gears.htm A non-geared approach is to half step a 400 step-per-revolution motor. However, I haven't seen a 400 S/R motor at a surplus outlet for some time. Mike Powell www.mikesflightdeck.com www.mikesflightdeckbooks.com
PanelBuilder Posted September 8, 2011 Posted September 8, 2011 The brass gear shown in the All Electronics picture is a 48 pitch gear which mates with the 48 pitch Delryn gears from Serv-O-Link http://www.servolink.com/gears.htm Thanks a lot for this Mike. I've been using servocity: http://www.servocity.com/html/48_pitch_plain_bore_gears.html but their shipping's a killer. Cheers, Colin
KLaFaille Posted September 9, 2011 Author Posted September 9, 2011 Yep, thanks for the heads up on the steppers Mike. Gearing these will definitely have to happen, you can see how touchy they are in the video. The video, and my twitchy sausage fingers, don't convey it that well but if you are very careful moving the synchro the motion of the ball is very smooth as it should be. I'm not overly concerned with losing speed due to gearing considering this is an A-10 not a super twitchy fighter so it should be able to keep up well with the sim, but I'll have to experiment to be certain. One thing I know for certain though, I'll be mounting the transformer pack on the rear of the ADI along with the static converters in a remote, sound deadened location. That hum is crazy loud in person and I don't have two turbofans behind my head to cover the noise. ;)
brydling Posted September 9, 2011 Posted September 9, 2011 (edited) One thing I know for certain though, I'll be mounting the transformer pack on the rear of the ADI along with the static converters in a remote, sound deadened location. That hum is crazy loud in person and I don't have two turbofans behind my head to cover the noise. ;) The first second or so (before the engine start-up sequence begins) you hear a cockpit just as it should sound :thumbup: Niclas Edited September 9, 2011 by brydling Digital-to-Synchro converter for interfacing real aircraft instruments - Thread Check out my High Input Count Joystick Controller for cockpit builders, with support for 248 switches, 2 POV hats and 13 analog axes. Over 60 units sold. - B256A13 www.novelair.com - The world's most realistic flight simulators of the J35J Draken and the AJS37 Viggen.
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