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Subject: 
Re: I wish Lego made an "Anti-Backlash Gear"
Newsgroups: 
lugnet.robotics, lugnet.technic
Date: 
Tue, 3 Apr 2001 13:44:32 GMT
Viewed: 
3146 times
  

The closest thing to an anti-backlash gear is the Conical gear (a misnomer).
It can be used to load a gear train. I have used this in a design by Iain
Hendry.
http://bobfay.users5.50megs.com/newmill.htm

I have tried using a second motor in the gear train with a slight reverse
current. This pretty bulky.

I think the gear you want is a sandwich of two gears that are spring loaded
so the teeth oppose each other. This would work in a small gear train.

There is another example of the conical gear at the end of this page.
http://bobfay.users5.50megs.com/speedy.htm
--
Bob Fay
rfay@we.mediaone.net

http://bobfay.users5.50megs.com/index.html
http://www.geocities.com/Heartland/Bluffs/7900/
"Eric Sophie" <Legomaster@gobi.com> wrote in message
news:GB7x2F.J0G@lugnet.com...
Tech question for us: Any body know what an Anti-Backlash gear is?

   
         
     
Subject: 
Re: I wish Lego made an "Anti-Backlash Gear"
Newsgroups: 
lugnet.robotics, lugnet.technic
Date: 
Tue, 3 Apr 2001 16:53:24 GMT
Viewed: 
3094 times
  

Whoa, I gotta think about this one for awhile.....


In lugnet.robotics, Robert Fay writes:
The closest thing to an anti-backlash gear is the Conical gear (a misnomer).
It can be used to load a gear train. I have used this in a design by Iain
Hendry.
http://bobfay.users5.50megs.com/newmill.htm

I have tried using a second motor in the gear train with a slight reverse
current. This pretty bulky.

I think the gear you want is a sandwich of two gears that are spring loaded
so the teeth oppose each other. This would work in a small gear train.

There is another example of the conical gear at the end of this page.
http://bobfay.users5.50megs.com/speedy.htm
--
Bob Fay
rfay@we.mediaone.net

http://bobfay.users5.50megs.com/index.html
http://www.geocities.com/Heartland/Bluffs/7900/
"Eric Sophie" <Legomaster@gobi.com> wrote in message
news:GB7x2F.J0G@lugnet.com...
Tech question for us: Any body know what an Anti-Backlash gear is?

   
         
     
Subject: 
Re: I wish Lego made an "Anti-Backlash Gear"
Newsgroups: 
lugnet.robotics, lugnet.technic
Date: 
Wed, 4 Apr 2001 01:40:02 GMT
Viewed: 
2983 times
  

It's not so much the "conical" gear that takes the backlash out of the setup
that Bob Fay provided links to, but the ability to use the technic axles as
torsion springs and keep the gear teeth in the train loaded at all times.
That particular gear does make it much easier to do this trick with out
breaking LEGO(R) parts though : )

                                                HTH,
                                                Xanthra47

"Bob Fay" <rfay@we.mediaone.net> wrote in message
news:GB7y67.LCK@lugnet.com...
The closest thing to an anti-backlash gear is the Conical gear (a • misnomer).
It can be used to load a gear train. I have used this in a design by Iain
Hendry.
http://bobfay.users5.50megs.com/newmill.htm

   
         
   
Subject: 
Re: I wish Lego made an "Anti-Backlash Gear"
Newsgroups: 
lugnet.robotics, lugnet.technic
Date: 
Wed, 4 Apr 2001 02:20:33 GMT
Viewed: 
3339 times
  

Bob Fay wrote:

The closest thing to an anti-backlash gear is the Conical gear (a misnomer).
It can be used to load a gear train. I have used this in a design by Iain
Hendry.
http://bobfay.users5.50megs.com/newmill.htm

I have tried using a second motor in the gear train with a slight reverse
current. This pretty bulky.

I think the gear you want is a sandwich of two gears that are spring loaded
so the teeth oppose each other. This would work in a small gear train.

There is another example of the conical gear at the end of this page.
http://bobfay.users5.50megs.com/speedy.htm
--
Bob Fay
rfay@we.mediaone.net

http://bobfay.users5.50megs.com/index.html
http://www.geocities.com/Heartland/Bluffs/7900/
"Eric Sophie" <Legomaster@gobi.com> wrote in message
news:GB7x2F.J0G@lugnet.com...
Tech question for us: Any body know what an Anti-Backlash gear is?

What set(s) include this "conical" gear?

   
         
     
Subject: 
Re: I wish Lego made an "Anti-Backlash Gear"
Newsgroups: 
lugnet.robotics, lugnet.technic
Date: 
Wed, 4 Apr 2001 04:06:16 GMT
Viewed: 
3326 times
  

In lugnet.robotics, Jonathan Wilson writes:
What set(s) include this "conical" gear?

Far as I can tell, these are the gears used in the gearboxes in 8880, 8448,
8480, and prob'ly others.

ROSCO

   
         
   
Subject: 
Re: I wish Lego made an "Anti-Backlash Gear"
Newsgroups: 
lugnet.robotics
Date: 
Wed, 4 Apr 2001 21:56:30 GMT
Original-From: 
Brian Dichter <dbrian@#AvoidSpam#enteract.com>
Viewed: 
0 times
  

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