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e-Gaui Hurricane 200 & 550 - EP100 > Hurricane 550 Gear mesh. Problem
 
 
Murph
Heliman
Location: England

I have a standard frame 550 with a Z20 980kv with 14T.
I have also seen the build vids and expected the troublesome gear mesh adjustment method.
Here is my problem and i will try to keep it simple.
The geartrain in the heli runs freely with no motor fitted.
The motor turns freely straight from box.
The motor turns freely when bolted to motor mount.
the motor turns freely when fitted into frame with mesh backed off.
The motors becomes VERY tight when the correct mesh is set,there is still some backlash even.I can not turn the main gear with fingers because its so tight.I can not see any twists in frame etc and the pinion is a gaui item with same part number as is manual.
It is so tight/notchy i really think it would cause probs when powered up.
I can set mesh ok on trex etc.but never had a motor this big before.
Am i correct in thinking that the motor should feel the same (almost)regardless of lose or correct mesh.When set at present i can just spin head using grips by hand.
Has anyone had this problem.
03-26-2008 02:36 PM
 
 
michael88997
Veteran
Location: northern texas, us

have you tried just backing off the motor a hair? i have the same setup and i can spin the main gear easily


---------------------------------
hurricane 550
03-26-2008 06:34 PM
 
 
concept1
Key Veteran
Location: Youngstown, OH

I assume you are setting the mesh with the motor unplugged or if it is plugged in you have not turned the tx on at all? I ask this because if you are using the gaui esc,and you turn on the rx and then turn it off, for the next hr or so, it will "charge" the magnetic field on the motor, causing it to be very hard to turn. but if you are installing a new motor I assume it is not hooked up yet! have you used this pinion before or is this a new build?

All I can think of is to remove the pinion and main gear and confirm they mesh correctly. If you just ordered this pinion it is possible the wrong one could have been sent. do you have any other pinions?
you should be able to spin the main gear with your thumb either direction fairly easily, with resistance but if you give it a hard spin it should make at least 1 or 2 revolutions on it's own.

also look at the pinion, are the teeth cut straight? meaning on some pinions at one end of the teeth, normally the bottom, the cut may not be straight so to work properly you would need to slide the pinion down on the motor shaft so the main gear hits the clean cut portion of the pinion (trex 450 brass pinions are like this) i am not using the gaui's so I don't have one to look at. but I just reciently swapped out my Trex pinion and had this problem.
03-26-2008 07:03 PM
 
 
Wot
Heliman
Location: England

sorry mistake
03-26-2008 08:20 PM
 
 
Murph
Heliman
Location: England

The motor is not connected to esc/batt.
The 14t pinion is a Gaui item with same part number as in manual.I have a 15t also and that is the same.
The only thing i can see is that the teeth on the pinion are not like the main gears and tail take off.These have squared ends on teeth.The pinion have kinda tapers.
I am going to try and post pictures.
03-26-2008 08:29 PM
 
 
Murph
Heliman
Location: England

Here is the pinion,Hope it shows enough detail.
This is set way loose and any more mesh locks the motor up,almost.
Do the teeth on the pinion look normal.

03-26-2008 08:38 PM
 
 
Murph
Heliman
Location: England

I only got this heli because my spare 3050`s fit (unlike the trex500).
I am at the pont now wherei feel like junking the heli and ghetting something else.Because noway will it fly with this problem.
03-26-2008 08:41 PM
 
 
concept1
Key Veteran
Location: Youngstown, OH

when I get home I will dig out my stock gear and pinion and look at how they mesh together, from the pic It looks like the teeth on the pinion just isn't right for the main gear. althought it looks like your mesh is good. is it still tight even with the mesh set in the pic? by looking at the pic the teeth on the plastic main gear are cut deep and a straight V cut, and on the pinion they are more rounded so no way you can fit the pinion in tight to the main gear, I would say it looks good as is unless it is still turning tight?
03-26-2008 08:55 PM
 
 
michael88997
Veteran
Location: northern texas, us

have you tried using paper to set it up?

Quote 
I am at the pont now wherei feel like junking the heli and ghetting something else.

if your going to junk it ill take it lol


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hurricane 550
03-26-2008 09:05 PM
 
 
mjdee14
Senior Heliman
Location: Nashville , TN

I had to cut both side of my frame to get the motor to sit in properly and have celarance....do you have clearance on both sides?

Mike... Blade CP, HBCP2, Revo w/belt drive, Zoom 400, Eco 8, Hurricane 550, DX7 2.4
03-26-2008 09:21 PM
 
 
michael88997
Veteran
Location: northern texas, us

yea i trimmed the frame a little


---------------------------------
hurricane 550
03-26-2008 09:34 PM
 
 
Murph
Heliman
Location: England

concept1, With the mesh set in picture,the geartrain is smooth BUT there is loads of backlash.

I have a trex so setting mesh is not new to me.On this heli i do not know a good way to use the paper method because the motor mounting is so awkward.motor to mount then mount/motor to frame,With no access to motor screws.
My frame sides was also tight,just touching the motor.If you look they are warped in fact.It even throws the ail and pitch levers off line.I put a spacer in the frame to match motor mount width.This spacer IS NOT causing my problem.It does it with or without spacer.
03-26-2008 09:59 PM
 
 
dick smith
Senior Heliman
Location: perth

heres mine....



is it a one way bearing issue or the tail belt round the wrong way?

that is stock gear, pinion
03-27-2008 10:26 AM
 
 
Murph
Heliman
Location: England

dick smith,
Yours looks spot on.
My boom is not even fitted to frame yet so i can rule out belt.
From what i have sen so far the OWB looks ok.
On your heli can you turn the (small)front maingear by hand.Just enough showing on frame sides to grip?
On mine i can not move it at all.
03-27-2008 02:25 PM
 
 
concept1
Key Veteran
Location: Youngstown, OH

I would definalty remove the main gear and the pinion gear, and see if they mesh correctly on the bench out of the heli. It looks to me that your pinion is not right the teeth look too thick??? I found my original gaui main gear but I could not find my stock Gaui pinion although I did find several other pinions(from old cars and a old lite machines heli) which mesh correctly with the Gaui main gear, so you can probalby hit the local hobby shop and grab a new pinion. these pinions I have were cut the same shape as the plastic gear and fit,
the teeth on Dick smiths pinion obviously fits the main gear!
03-27-2008 02:35 PM
 
 
dick smith
Senior Heliman
Location: perth

its a tricky one bud.Ive got the z20 also and it slotted straight in, no problems...


the only suggestion i have is to do a process of elimination, put the motor in, give it more mesh than is shown in your photos.If it doesnt turn, then i wood try taking off the the rear main gear first and see if the motor and front gear turn with out binding.

if it still binds, then i wood take a closer look at the the front gear or OWB...

if after mucking round with it and no success, then the LHS is prolly the next stop.

dont get too discouraged about it bro.... it prolly just a teething problem....(get it,teething problem... ha ha)
03-27-2008 11:43 PM
 
 
Mikej
Heliman
Location: UK

Quote 

dick smith

.... it prolly just a teething problem....(get it,teething problem... ha ha)

*groan*
03-28-2008 09:44 AM
 
 
Bugdozer
Heliman
Location: Los Angeles, CA

Make sure your motor is not touching the frame around mid motor. I had to use a mini drum sander in my Dremel tool to open up the frame a bit. Before I did, the motor would bind on the frame, locking it up.
03-29-2008 04:40 PM
 
 
bensidus197217
New Heliman
Location: Richmond B.C. Canada

Teeth are wrong

The teeth are wrong! You need a matching taper(slope angle) If you have a lot of time you can take a small triangle type file and make the teeth slope fit each other. Teeth meshing rules like this apply to all gears from massive mining rigs to the tiniest gears. If you get enough clearance by adjustment you will end up wreaking both gears and shorten the life of both gears greatly or they will slip and chew a piece out of the bull gear(big gear). Good luck and if you do as I say you will cure your problem. Jim
04-10-2008 10:22 PM
 
 
Sgt Heli
Veteran
Location: Remlap, Al USA

I wonder if Murph got it sorted out.
04-14-2008 02:24 AM
 
 
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e-Gaui Hurricane 200 & 550 - EP100 > Hurricane 550 Gear mesh. Problem
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