"Ed Huntress" wrote in message
...
On Fri, 19 Apr 2013 19:22:33 -0500, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote:

"Pete C." fired this volley in news:517189f8$0
:

Dedicated fixtures are for production or at the very
least commercial work where there are funds to cover the cost of those
fixtures. Those of us doing personal projects don't like to waste
perfectly good material on a one off fixture.


Fixtures can be as simple as a waste plate with a few bolts through the
workpiece. If it changes for every new workpiece layout, it is - in a
sense - a "dedicated fixture".

Lloyd

heh...one of my first memories when I got my job at _American
Machinist_ and started visiting job shops was the "fixtures" rack in
one particular shop. I thought it was a staging area for cutoffs and
scrap.

There must have been fifty of the things on that rack. I wonder how
those guys remembered which one was for which job. g


A ledger, indexed by part number; if the job uses several tools then each
one has a sub-entry every space on the rack has a definite name such as
rack 16 shelf 5 pos k......

Each tool is engraved with the part and fixture number in case it ever gets
misplaced; the planning traveler spells out which tools are needed to make
any particular part.

---

When I first went to work at Lazy B, fixtures were ordered from a wharehouse
located several miles a away, you could expect a delay of at least 1/2 shift
and so it was important to order in advance--the ordering procedure involved
dialing into a computer main frame, placing the telephone handset onto a
teletype modem and then accurately typing in several pieces of pertinint
data in strict order.

http://eksfiles.net/wp-content/uploa...5-computer.jpg