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Ilirio
Posts: 35
So I've been flying more or less digital/glass cockpits until now that JU-52 has came into my hands. I would like to build some gauges for my cockpit but I really don't know where to start. Well, OK, I know they should be based on stepper motors but I don't really know anything about those (which are usually used with Mobiflight or which additional circuits I may need, if any,...). But also, once I would have my stepper motor working, where do you buy the case for them. I don't have 3D printer and I don't know how or where to search.
2021-10-22 08:05
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pizman82
Moderator
From: ETSI, Germany
Posts: 4989
Supporter
Hi

A complex thematic that could not awnserd within a short posting. What you need is a longer search and some talking sessions with other users. Explore the projects ( Discord Groups) to see some ideas and to talk to the creators.

Basic Info:

1. Gauges vs. Screen
Building lots of Gauges in a small area is advanced, expensive and finally difficult to handle. For sure possible but this is not a beginners work. And i would say without CNC your out of buisness here. May you find a shop for C172 Gauges.... But i will say 99,9% you find nothing for a JU52. So "Self Build" is a must have here.
So lets talk about the alternate..... Called "Airmanger" or other programms in this logic.
This Software get Data from the Sim and can show the "Gauge Disc" ( E.g. the label and the Needle of the SpeedMeter). You can put this "Window" on every spot on your screen and you can resize it as you need. So logic is.... You Buy a Wood/Acryl Plate.... Paint it and you cut "just" the round holes for every gauge you need. Then you mount a screen behind the plate..... And you finally create all the gauges as virtual Windows on that screen and move them to the spot you need.... So the "Picture" is directly behind the drilled hole in the plate.

Check THIS...... https://cessna172sim.allanglen.com/docs/instrument-panel/

If you decide for real gauges......

2. What Motor.... Here i will say Stepper. Servo workes but is not so perfect and accurate. And Steppers allow "over360" instead of Servo.
Technical you should plan for a external power to the motors..... So they are controlled via Mega ( ULN2002 Boards) But they are powerd from a 5v supply external !
Steppers need a lot of power.... So already 2 Motors would overdrive the Mega Limits !

3 Constructing without CNC
Difficult. Whatver you should not think about "Housings".
Techical the front side of the gauge can be a quadratic Acryl Plate 2-3mm painted. One hole in the middle for the shaft. The Motor is behind. You finally screw this element from behind on the Front Panel that have a cuted round hole.
Basically you not need to take care how the panle looks from behind. The front must be realistic. All other not matters.
So i would not think about Gauges like oin real ( A Round Zylinder including all the Mechanic and is put into the Hole from the front) . You can "fake" here by putting a round frame on the front so it looks like the gauge is located there..... But in real its just a quadratic plate on the other side.


I will say lots of things are possible. You can cut the round holes by put a bottle of beer on the plate and mark the frame with a pen and then cut it with a hand saw. But to be realistic..... If you like a "perfect" Look and a realistic feeling then you will need CNC at the end.

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Last Tipps:
Search the web and talk to other people. May you find a friendly user near your location who got a CNC and can help.
Also some factorys have a CNC for there work and may you can talk to them and for some bucks and a little gift they can support you. Finally there exist Websites you can order perfect CNC Panels on your own CAD Files. Not cheap but perfect. Specialy CHINA is currently cheap and fast !

Simply ask if you got specific questions !
Good Luck !
2021-10-22 14:35
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Keiji.K
From: Kyoto, Japan
Posts: 2
I made a lot of cockpit instruments with steppers. I didn't use a 3D printer. You can use a plastic cutter to cut it into a round shape.
http://cpm80.html.xdomain.jp/CockpitFactory/index_eng.html
2021-10-23 03:43
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Ilirio
Posts: 35
iconKeiji.K:

I made a lot of cockpit instruments with steppers. I didn't use a 3D printer. You can use a plastic cutter to cut it into a round shape.
http://cpm80.html.xdomain.jp/CockpitFactory/index_eng.html



Wow!! What an amazing site! I'm still in the searching and reading documentation phase but I for sure borrow some ideas from that site of yours!!

Thank you for your help
2021-11-07 10:31
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Ilirio
Posts: 35
Hi!!

That's really a huge amount of information and I'm so newbie... (I had even to find out what CNC meant :blush: ). During this time I've doing some research and I found two guys who make generic gauges and 3D models for WWII classsic german planes, I will leave here the links just in case they are useful for other cockpit builders

Generic Gauges:

https://www.youtube.com/watch?v=1BZD57Ts6O0

Models for Classic WWII German aircraft:

here: https://www.ebay.es/sch/christophv12/m.html?_nkw=&_armrs=1&_ipg=&_from=

and here: https://www.shapeways.com/shops/luftwaffe-cockpit-parts


Another question, which stepper and controllers are commonly used with Mobiflight?
2021-11-07 10:40
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StephanHo
Moderator
From: EDDG, Germany
Posts: 1785
Supporter
Hi Jorge,

there are a lot of steppers that can be used with MF. The most used one I suspect is the 28BYJ-48 5V-Version.

A very good documentation you can finde here: https://lastminuteengineers.com/28byj48-stepper-motor-arduino-tutorial/.
Due to the high power consumption of the stepper, it is recommended to use an external power supply. Please don't forget to connect the GND of the external power supply to the GND of the mega-module(s)..
Grüße,
Stephan (Time: UTC+1)
2021-11-07 12:28
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