Subject:
|
Re: Help needed on gear spacing, and another question
|
Newsgroups:
|
lugnet.technic
|
Date:
|
Fri, 3 Apr 2009 17:18:02 GMT
|
Viewed:
|
21027 times
|
| |
|
|
In lugnet.technic, Rafe Donahue wrote:
| |
I have (supposing studs up) a horizontal axle with a standard worm gear (4716)
on the axle. I also have a series of rack gears (3743) that I want to engage
the worm gear. I want the rack gears to sit still so that the worm gear moves
back and forth on the axle as the axle turns.
|
Technic worm gears are not really made to mesh with the 1x4 racks. The problem
is that the racks do not have any pitch (the gear teeth are perpendicular to the
longitudinal axis of the rack). The worm gear, by definition, does have a
pitch. In order for them to mesh without binding you would want the rack teeth
to be inclined at an angle to match the worm gear pitch angle.
There are plenty of Technic sets which have a stationary rack with a gear system
moving over it (basically a track). This is typically accomplished with 8 tooth
pinion gears, but any of the spur gears can work. See, for example, the
transforming mechanism on the 8852 robot.
| |
I am in need of a collection (probably 10 sets) of 1x1 tiles with the numerals
0 through 9 on them. Bricklink seems to show me that the numerals 1-4 exist
but not the others.
|
Remember in Star Wars Episode II when Obi-Wan is looking in the Jedi archives
for a planet (Kamino) and he can’t find it. The librarian tells him that if it
is not in the archives, it does not exist. The same is true for the Bricklink
archives. Unless you have an unexplained gravity well to point you in the right
direction, I think you are out of luck.
You could always have custom bricks engraved.
Care to share what kind of project you are working on? You’ve got my curiosity
aroused now.
Eric Albrecht
Technicopedia
|
|
Message has 2 Replies:
Message is in Reply To:
 | | Help needed on gear spacing, and another question
|
| Hi all, I have two requests; any help would be appreciated. First question: what is the proper spacing to use when using a worm gear to drive a rack gear? I have (supposing studs up) a horizontal axle with a standard worm gear (4716) on the axle. I (...) (16 years ago, 3-Apr-09, to lugnet.technic)
|
10 Messages in This Thread:
  
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
This Message and its Replies on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
