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Author Topic: Flight Control Pot bleedover  (Read 715 times)

Offline fsaviator

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Flight Control Pot bleedover
« on: January 14, 2018, 02:32:03 PM »
Hello all.  Still pounding away at this.  Got Prosim 2.0 in and now I'm refining the flight controls and setting them up within Prosim.

Issue:  I have a lot of bleedover in my axis.  I think it's due to the grounding on the Bodnar card.  I'm using single-conductor stranded 22AWG wire for the pots, twisted together ala FDS style.

Should I switch to 2-conductor shielded cable and for the three connections or is that overkill?  Any ideas?

I've got a mix of pots and I'm also thinking of making them all 10K Ohm.

Thoughts?

Warren "MTN385"
Florida

http://www.B737NG-SIM.com and https://www.facebook.com/fsaviator on facebook
FSX, Prosim737 Suite, FDS DSTD 2.0 MIP, RevSim Proline TQ, ACE Dual-linked Yokes, Intel 3.5GHz i7-3770K, MSI Z77A-G45, 16GB G.Skill TridentX DDR3-2400, Galaxy GTX670 GC 4GB, OCZ 60GB Vertex 3

Offline navymustang

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Re: Flight Control Pot bleedover
« Reply #1 on: January 14, 2018, 04:12:10 PM »
I'm using a simple three wire setup that are just held together with tie wraps running to each pot from the card. Some runs are 5 feet in length.

No bleed over at all. Using all 10k pots.
Building a full scale 737-800 AATD for home use. Majority of hardware is from Sismo Solutions, software is Prosim under P3D. An AOPA member and LifeTime member of National Association of Flight Instructors
Please note that I am a self-employed professional cockpit builder that provides consulting to defense contractors and civilian schools and airlines.

Offline Trevor Hale

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Re: Flight Control Pot bleedover
« Reply #2 on: January 14, 2018, 04:32:06 PM »
Hi Warren,

I remember fighting with the Flight controls on Sam's Sim.  We dropped the Prosim Calibration for aileron, elevator and Rudder, calibrated them through FSUIPC instead.

Maybe have a go at that.

Trev
« Last Edit: January 14, 2018, 04:32:22 PM by Trevor Hale »
Trevor Hale

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Offline fsaviator

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Re: Flight Control Pot bleedover
« Reply #3 on: January 14, 2018, 04:42:06 PM »
I've tried them in FSUIPC and Prosim.  The three main controls aren't too bad, it's once I start adding brakes for both sides that things go bad.

Warren "MTN385"
Florida

http://www.B737NG-SIM.com and https://www.facebook.com/fsaviator on facebook
FSX, Prosim737 Suite, FDS DSTD 2.0 MIP, RevSim Proline TQ, ACE Dual-linked Yokes, Intel 3.5GHz i7-3770K, MSI Z77A-G45, 16GB G.Skill TridentX DDR3-2400, Galaxy GTX670 GC 4GB, OCZ 60GB Vertex 3

Offline brianwilliamson

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Re: Flight Control Pot bleedover
« Reply #4 on: January 14, 2018, 11:53:21 PM »
Gooday Warren, I would recommend that you use 3 core shielded wire and earth the pot end to the back of the case on the pot.

There is a lot of noise in a sim, so the more you can shield the better.

Watch out for cheap power supplies and especially 400 Hz. PS's.

Regards............Brian W

Offline fsaviator

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Re: Flight Control Pot bleedover
« Reply #5 on: January 15, 2018, 12:06:49 AM »
Thanks Brian!
When you say earth to the back of the pot, do you mean solder the shielding to the pot casing?  What about the shielding on the other end of the run?

Warren
Warren "MTN385"
Florida

http://www.B737NG-SIM.com and https://www.facebook.com/fsaviator on facebook
FSX, Prosim737 Suite, FDS DSTD 2.0 MIP, RevSim Proline TQ, ACE Dual-linked Yokes, Intel 3.5GHz i7-3770K, MSI Z77A-G45, 16GB G.Skill TridentX DDR3-2400, Galaxy GTX670 GC 4GB, OCZ 60GB Vertex 3

Offline brianwilliamson

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Re: Flight Control Pot bleedover
« Reply #6 on: January 15, 2018, 12:48:59 AM »
Yes, solder to the pot casing. Usually leave one end free to stop feed-back loops is the normal way of doing it.

Cheers...........Brian W.

 

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