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Author Topic: Why are all servos rubber mounted?  (Read 1050 times)

MickK

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Why are all servos rubber mounted?
« on: November 26, 2015, 08:59:51 AM »




Why do all servos have rubber mountings? ?


All that does is to bring into the system, (any system) an unknown movement that I'm trying to get rid of!


Is it a throwback to the time when everyone had to use petrol/diesel/IC/whatever, motors that vibrated to the max? ?


These days, electric motors can run so smooth in a boat that there is no vibration to be felt.


Just a thought.


Mick


 
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plastic

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Re: Why are all servos rubber mounted?
« Reply #1 on: November 26, 2015, 09:16:22 AM »

I never use the supplied fixings - I either silicone them into position or use velcro & ty-wraps.

But yes, the original rubber mounts were to stop them being shaken to pieces with IC motors.
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inertia

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Re: Why are all servos rubber mounted?
« Reply #2 on: November 26, 2015, 09:22:58 AM »

You've answered your own question, Mick. Once again it's something we have been bequeathed by our model aircraft/helicopter/car colleagues, who probably buy 99.99% of all servos sold.
To be properly mounted there should be a brass eyelet in each grommet to prevent the screw from compressing the grommet too much and distorting it. The theory was that this would introduce the best level of anti-vibration mount that was possible in such a small space. These days you need to look at the way the power-boat guys mount their servos to see what's possible in that area.
Lawrie White (Model Slipway) has for a long time used a simple styrene-sheet box into which the servo is a push fit. As far as I know he's never had any problems with vibration. Most of my models are made of wood and have either ply or hardwood servo mounts, so I use the grommets simply because they fill up the big holes in the servo lugs!
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malcolmfrary

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Re: Why are all servos rubber mounted?
« Reply #3 on: November 27, 2015, 07:43:57 AM »

As modellers, I am sure that we can find other uses for the "free" spare parts such as grommets and eyelets.  Resilient motor mounts springs to mind.
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