On Mon, 22 Jan 2007, Chuck Guzis wrote:
On 22 Jan 2007 at 11:05, Jay West wrote:
Ahhh this makes sense. Example... trimming the
excess from an IDC type
connector. This flush cutter would get right next to the wall of the
connector as my scissors won't. Gotcha.
I've never used them for that--I've always used a sharp Xacto knife held
so it rides against the connector, but tilted slightly, so it doesn't
dig into the connector body. Makes a clean cut and is very fast.
Ideally, you'd want to cut the ribbon cable with a ribbon cable cutter
prior to installing the connector, and then crimp it with a tool that has
a wire stop so that it sits flush. Failing that, an Xacto is one of the
easiest ways I've found to fix it, though it still doesn't put a perfect
90 degree cut on the ribbon cable and you still have to be careful that a
strand from one wire doesn't short an adjacent wire.
There's a certain aesthetic purpose to using flush
cutters on a PCB.
Many of the cheap Asian boards that I've run into leave a couple of
millimeters of component lead extending above the board surface. Heaven
help you if you have to reach between two boards and manage to snag the
back of your hand on the exposed leads.
*cough* Philips Magnavox *cough*
Don't even get me started on how badly these boards also tend to be
soldered.
It's like sharp edges on stamped metal
parts--there's no reason other
than economy to leave them that way. I don't know how many times I've
opened a finger on the edge of someone's PC case.
And people used to wonder why I'd carry superglue in with my PC service
tools ;)
When electronics equipment used to be hand-wired in a
chassis, the sign
of a good builder was adequte use of tie strips and neatly placed (and
laced) wires. "Point to point" wiring with components flopping every
which way among a rat's nest of wiring was the sign of a hack, even
though both construction techniques produced a working device.
That reminds me of the JC80 chassis I was looking at this last weekend. I
had it out because I've been cleaning out the storage building. It is made
up of dozens of wire wrap boards. Most of the boards had their wire wrap
in nice neat layers with the wires taking 90 degree turns out from the
sockets. One board I noticed though had its wires randomly layered and
routed every which way and it looked pretty bad. It probably worked fine
at one time, but I'd not want to have to trace it out.
-Toth