Re: Is a USB to GPIB dongle/convertor a difficult project ?

Michael A. Terrell wrote:
Joerg wrote:
Michael A. Terrell wrote:
Joerg wrote:
Michael A. Terrell wrote:
Joerg wrote:
Yes, EMC is a pain with USB. Loose connector aren't such a problem.
Happens all the time. Did I plug in that BNC? Oh no ... move that
freaking heavy HP4191 back out, plug in, push it back, take pain pill
before the sciatic nerve flares up again.
Joerg, heavy test equipment should be on an equipment cart.

<http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=92862>
<http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=5770>
<http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=5107>

are some examples. Every bench at Microdyne had at least one cart. The
industrial carts they bought were just the right width for the HP
equipment, but we also used a couple pieces of 2" * 4" lumber and a
piece of plywood to use them with other equipment. A six to eight inch
gap at the front left room to store cables under the plywood. The only
time equipment had to be moved off a cart was when it went to the cal
lab. Even then, sometimes the whole cart was wheeled to the lab. If it
passed their tests, it was wheeled back. If not, that item was removed
from the stack and replaced with another piece of equipment from the
shelves of spare parts.

I use both the second and third in the list in my shop.

Those can easily tip over. I don't think OSHA would let that fly in
California. Most labs are like mine. A wide bench and a rack in the
back. The equipment gets shoved it that rack and you have to make sure
all required connections are there.

Not with the weight distribution we used. The carts were over 100
pounds, and the load was centered on the cart, along with items stored
on the bottom shelf. They used them that way at that location for over
20 years. At the peak of production they had two techs per 8' bench,
with most of their equipment on carts. That was when they were trying to
keep up with the demand for their 1100 series C-band satellite TV
equipment for CATV and broadcast customers. The only time anything
tipped over was when two idiots tied to move a loaded 8' workbench,
without help. When all four wheels swivel, it is almost impossible to
turn one over.

Until the cart hits a large extension cable on the floor. I've seen it
happen.


Absolutely no cords were allowed, anywhere on the production floor. All of the outlets, and test signal cables were dropped from the
acoustic tile ceiling. The facility was designed by the company's
mechanical engineers with safety and easy reconfiguration in mind. It
was a basically a single 180' * 190' room, with a small tool room near
the front of the 200' * 200' building. There were three buildings that
size. The front was offices and the stockrooms, the center was
manufacturing, and the third was leased to Lockheed Martin after
Microdyne left the sat TV business.

We reset the entire production floor in one eight hour Saturday
shift, to make room for the new RCB-2000 & DR-2000 product line. Prior
to that, production and test were in mixed groups, per product. We
reset the product flow to minimize floor traffic, and set some areas
with eight benches in quads, like oversized cubicles with four
doorways. That way each tech had two benches, to reduce setup time for
different jobs. We moved about 100 benches that day.


Most places I've seen operate in similar fashion. But you know how it goes. The guy with the floor buffer comes along, dragging that big power cable. Leroy wants to quickly finish up what the night shift didn't quite get done, he's a bit tired by now, rolls the cart with the heavy analyzer, oops ...

--
Regards, Joerg

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