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A HUGE Thank You to everyone who participated in the forum, especially obviously to Pizman and Stephan who did an outstanding job over so many years providing an incredible service to the MobiFlight community.

The forum is still providing a lot of good content, hence we keep this information accessible.

Message #20382

savery999

From: United States

Posts: 31

Hi, For gauges that need 2 needled directly on top of each other, what type of servo is used to do both needled?, e.g. 737 cabin pressure gauge?, i cant seem to find how these designs would work? is there a dual servo avaliable...I can seem to find one after various searches?

6C38 8 FLT32 x 2 AIR_DuctPressNeedle (2)

thanks, Steve

[Last edited by savery999, 2020-10-06 20:25]

Thanks, Steve Avery

2020-10-06 19:33

Message #20383

pizman82

Moderator

From: ETSI, Germany

Posts: 6010

Supporter

There exist no Dual Servo as i know. ( If it will exist it is pretty sure much to expensive for regulary cockpitbuilders :-) )

Those gauges ( also the Flaps) work technical like a DUAL Encoder. So they have 2 Shafts. A Inner and a outer shaft.
They have also 2 indipened Motors..... each controll one shaft.
The trick is design this with layers. Layer 1 is the frontplate. Layer 2 include the first motor and here the outer shaft is ending. Both connected together for example with 2 cogwheels.
The inner shaft is longer and go through this layer to the next..... In layer 3 the inner shaft ends and there is Motor 2.... Also with 2 Cogwheels connected together.

O other logic is to mount both Motor in one layer just with a little offset height .... Then the building get smaller and more compact. Here you must get sure the both shafts not touch each other for a smooth mechanic movement !

A good example is this..... https://www.youtube.com/watch?v=GEVdX6loGas

Good Luck !

2020-10-06 21:27

Message #20387

savery999

From: United States

Posts: 31

ahhh I see, great thanks

Thanks, Steve Avery

2020-10-06 22:21