Subject:
|
Re: Strong gear assemble?
|
Newsgroups:
|
lugnet.robotics
|
Date:
|
Fri, 22 Sep 2000 13:37:48 GMT
|
Viewed:
|
800 times
|
| |
|
|
Jude Beaudin wrote:
> Would the friction created be that much of a problem? Would the loss in
> efficiency be that noticeable? (Note: These are not rhetorical questions so a
> response would be appreciated :-)
As ever, the most appropriate response to this question would have to be "it
depends". In "real" engineering applications the answer is generally yes -
certainly when I have used linear drivers based on worm screws in the past,
their efficiency has been pretty pathetic compared to an equivalent rotational
solution.
I suspect much of it has to do with the load placed on the worm screw, the
greater the load, the higher the friction. It's to do with the way the worm
screw works - it is effectively an inclined slope you are dragging something
(the non-worm gear) up. This is where the friction and inertia come in, which
are not so prominent in normal gear trains (assuming they have good bearings).
Personally I have found the effect noticable when using the worm gears as part
of a drive train for a vehicle. When used on the crane model on my web page to
raise and lower the boom, I wasn't really that bothered as there was no
alternative to using the worm screws. In this case the worm screw was at the
start of the gear train so I assume frictional losses due to heavy load were
minimised.
There is a good web page on all this stuff here:
http://www.cs.cmu.edu/~rapidproto/mechanisms/tablecontents.html
Jennifer Clark
|
|
Message is in Reply To:
 | | Re: Strong gear assemble?
|
| (...) Would the friction created be that much of a problem? Would the loss in efficiency be that noticeable? (Note: These are not rhetorical questions so a response would be appreciated :-) Jude (24 years ago, 22-Sep-00, to lugnet.robotics)
|
12 Messages in This Thread:
 
 
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
Active threads in Robotics
|
|
|
|
|
|
