RE: Can You Slow Down a Servo?

RE: Can You Slow Down a Servo?
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RE: Can You Slow Down a Servo? - 8/1/2007 7:24:10 PM

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From: Chesnee, SC, USA
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Also this one:

http://www.rcdude.com/servlet/the-25/Dionysus-Dual-adjustable-servo/Detail

Good luck.

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RE: Can You Slow Down a Servo? - 8/1/2007 7:28:39 PM

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Ok. last one.... He has a ton of gadgets for slowing servos to different speeds, expo, everything.... I'll let you pick for yourself.

http://www.rcdude.com/servlet/Categories?category=RC+Gadgets

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RE: Can You Slow Down a Servo? - 8/1/2007 7:52:41 PM

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Thanks for the links but those items did not do what I need - unless I didn't read them clearly.

I am needing something that slows the servo down when it first has power applied.

For example, let's say you turned your plane off with the throttle all the way to idle. When you turn on your transmitter you have the throttle set to full. So, when you power on your receiver the throttle servo will go to the full throttle position. That is what I want to slow down. Not the speed at which it moves when I move the stick.

Does that make sense? Sometimes my brain doesn't communicate clearly with my fingers...

< Message edited by rwright142 -- 8/1/2007 7:53:19 PM >

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RE: Can You Slow Down a Servo? - 8/1/2007 11:05:03 PM

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I understand what your talking about. I do not think there is anything made that would cure it.
Pat

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RE: Can You Slow Down a Servo? - 8/2/2007 3:07:50 AM

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I disagree. I think that the first link spiral72 listed is exactly what you want. The servo is moving when you turn on the power because the Tx is telling it to. No different than any other time you move the stick.

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RE: Can You Slow Down a Servo? - 8/2/2007 11:55:28 AM

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Crash90, thanks. I was not clear on that, now it makes sense.

I have what is called a "WingMan" (a circuit board that slows the servos down (adjustable speeds) used for setting the speed for folding/spreading wings). If I have the tx switch in the wrong position the servo travels to the other position at it's normal speed when the rx is powered on. That could cause damage as the wings would travel quickly to the other position.
You're explanation helped clear this up for me.
Of course, the obvious solution is to make sure I have the tx switch in the right position before turning on the rx! But, I am very good friends with Murphy...

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RE: Can You Slow Down a Servo? - 8/2/2007 12:55:52 PM

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quote:

ORIGINAL: Crash90

I disagree. I think that the first link spiral72 listed is exactly what you want. The servo is moving when you turn on the power because the Tx is telling it to. No different than any other time you move the stick.

I have to disagree

On some of my warbirds i was very careful to set them up the same so all switches move the same direction for the same function. When turning on the RX some of the servos cycle and move full speed in one direction or the other to it's end point then move to where the TX is telling them to go. This happens weather the plane has been sitting for a week or after simply turning the RX on,off then back on leaving the radio on when doing so. I don't know for sure but i believe they do this because the RX is booting up and for a second after turning on the RX it is not listening to the TX
Pat

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RE: Can You Slow Down a Servo? - 8/2/2007 1:06:55 PM

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Humm... I'll have to experiment some. I wonder if it depends on the servo or receiver as to how they 'initialize'?

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RE: Can You Slow Down a Servo? - 8/3/2007 2:25:30 AM

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Here's my thoughts on this

The servo responds to the difference between the control signal (as seen on the control lead from the Rx) and its own position as determined by the potentiometer inside the servo.

The speed at which it responds to this difference is determined by the control electronics inside the servo itself, to change this would be difficult unless the servo was programmable.

If it's not possible to ensure that the transmitter is in the correct position an option might be to try and absorb the initial kick from the servo mechanically as someone has already suggested.

Interesting question this..........

Terry

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RE: Can You Slow Down a Servo? - 8/3/2007 2:37:57 AM

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Bank Yank. In all my years of flying I have never seen that happen. I have always used futaba or hitec Rx though. Maybe some of the other name brands are different. I am not sure how the gadget works that slows the servo but my money says that if it indeed does what it says it does then it will work during initial startup. That is of course assuming that you have the Tx turned on before turning on your Rx.

Could be wrong.

Edit. I sure hope it wasn't your retract servos "cycling" during startup.

< Message edited by Crash90 -- 8/3/2007 2:39:32 AM >

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RE: Can You Slow Down a Servo? - 8/3/2007 2:41:18 AM

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Take a look at this from Oregon Scale Aviation. It's designed specifically for folding wings

WingMan Features
Four selectable wing sweep or fold speeds
Fast Down mode to simulate faster lowering than raising speed
Servo travel adjust from transmitter (fold servo only)
Servo reversing for both latch and fold servos
Continuous control even with loss of transmitter signal
Sequences uninterrupted by noisy or missing transmitter signal
Digital noise filtering to prevent spurious sequencing
Fail safe return to previous position if switched during fold sequence
High quality multi-layer circuit board technology
Designed and manufactured in the U.S.A.
Price: $59.95 + $2.95 S&H

http://home.comcast.net/~rich2001/osa/

They also have some other interesting items. I recently picked up their ThermoCowl. It's designed to operate cowl flaps controlled by engine temp. I'll be using it to control a fan for cooling my fully cowled RCV engine.

Scott

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RE: Can You Slow Down a Servo? - 8/3/2007 4:23:28 AM

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quote:

ORIGINAL: Crash90

Bank Yank. In all my years of flying I have never seen that happen. I have always used futaba or hitec Rx though. Maybe some of the other name brands are different. I am not sure how the gadget works that slows the servo but my money says that if it indeed does what it says it does then it will work during initial startup. That is of course assuming that you have the Tx turned on before turning on your Rx.

Could be wrong.

Edit. I sure hope it wasn't your retract servos "cycling" during startup.

Well maybe my stuff is different from everyone else's. I dunno

I have had a Futaba 8UAPS,Hitec Flash 5,Hitec Optic 6, JR XP7102 and now a JR DX7.
They all have done it. Why i dunno????

And yes the retract servo is one of the ones that do it,,BUT all my birds use Robart gear

Pat

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RE: Can You Slow Down a Servo? - 8/3/2007 11:45:11 AM

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quote:

ORIGINAL: saramos
Take a look at this from Oregon Scale Aviation. It's designed specifically for folding wings
WingMan Features

A few posts up (#31) you'll see where I have the WingMan. That's the reason for this thread. If the wings are folded and the TX switch is in the spread position, the wing servo will move quickly to the spread position when the RX is powered on. This may damage the servo, wings, or both. That's why I want to slow the wing servos down for this initial movement.

I've got the WingMan working perfectly otherwise. It's a great product and working with Buz has been great. I'm also getting the Channel-3. I'll use that to open my canopy when the flaps are all the way down and throttle is 25% or less.

Have fun with the ThermoCowl - I had considered that too and may end up with it if I need more nose weight.

< Message edited by rwright142 -- 8/3/2007 11:47:27 AM >

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RE: Can You Slow Down a Servo? - 8/3/2007 12:40:22 PM

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Here is something unorthodox you could try before you buy so to speak. Try unplugging the wingman thing, Turn the TX/RX on wait a second or two then plug it back in. If it then moves slow you could put a small switch in line from the power supply. Kind of a pain but it might cure the problem. If it works all you would need to do is add a small switch to the red or black wire of the servo lead of the Wingman thing from the RX to the Wingman. Power on the TX then RX then the Wingman..It's 4:30am and 1/4 cup of coffee.Hope what im trying to say is clear enough

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RE: Can You Slow Down a Servo? - 8/3/2007 12:48:32 PM

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It's makes perfect sense - now that I've had my coffee

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