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HomeAircraftHelicopterHelicopter Main Discussion › motor gear and main gear adjustment?
02-04-2008 06:39 AM  10 years agoPost 1
Nicros

rrApprentice

San Diego, CA

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I am having a tough time getting the motor pinion gear and the main gear adjusted right.

If they are too tight together, the rotors dont turn smoothly and it puts a lot of tension on the main shaft. If they are too loose, then I hear this gravelly grinding sound when the blades are spinning, which also seems to not be good.

Anyone have any tricks to align these two gears just right?

Ever notice how crash rhymes with cash?

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02-04-2008 06:50 AM  10 years agoPost 2
rcfreak7

rrApprentice

southern california

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loosen the motor and put a piece of paper in between the gears then press the motor twards the main gear and titen the motor down and it should be just about right

i am my own dog

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02-04-2008 03:44 PM  10 years agoPost 3
BarracudaHockey

rrMaster

Jacksonville FL

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Yep.

You should be able to run a strip of notebook paper through the gears. If it comes out mangled they are too tight. If it comes out wavy they are too loose, it should come out with a nice crisp accordian fold.

Andy
AMA 77227
http://www.jaxrc.com

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02-04-2008 06:51 PM  10 years agoPost 4
ZXXflyer

rrKey Veteran

stone mountain, georgia, US

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can't you also adjust gear mesh by finding the "hi-spot" on the main gear and then adjusting for ZERO backlash at that point?

Obviously if the gear is perfect and has no hi-spot, then you would use the notebook method.

Believer in Weston motors!

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02-04-2008 06:52 PM  10 years agoPost 5
BarracudaHockey

rrMaster

Jacksonville FL

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You dont want zero gap you will just burn out stuff prematurely and drain your battery.

Andy
AMA 77227
http://www.jaxrc.com

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02-04-2008 08:08 PM  10 years agoPost 6
Andy from Sandy

rrElite Veteran

Bedfordshire, UK

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Yep, you should find the high spot and then adjust for a small amount of back lash. We don't know what the heli is but in the Align manual for the 450 it recommends "Set the pinion gear to main drive gear mesh to approximately 0.05mm. Setting the gear mesh too tight will result in excess power consumption and poor performance, setting it too loose will result in stripped gears and noisy operation."

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