[rescue] Question of how to "smooth" power from Laser printer

Robert Darlington rdarlington at gmail.com
Thu Mar 27 11:54:12 CDT 2008

Ah, inductive loads.  Actually the worst thing you can do for your UPS
is to plug in a laser printer.  You might want to look at a big
isolation transformer or just use a different circuit.  (unless you
can dig up a fridge sized Leibert magnetic datawave synthesizer...)


On Thu, Mar 27, 2008 at 10:30 AM, Earl Baugh <earl at baugh.org> wrote:
> Hey, got a question that popped up after I got stuff moved into my new
>  rack... I don't know if I mentioned that I was going to (and how have) built
>  a desk using the 4 posts that had made up the old rack -- found the Atlanta
>  Fixture store -- a restaurant supply place, where you can pick up table tops
>  that won't flex, reasonably priced... better if you're willing to take the
>  floor sample, which I was..   So, got a desk top that's basically got 4 - 7
>  foot tall legs... which results in more 1/2 deep  rack space... shelves fit
>  on either side, and don't cause any head danger or problems as long as
>  they're high enough.   So I shelved the printers and scanner "above" me
>  now... within reach as well... and cleared off a 7 foot table which is going
>  to result in a lot more usable floor space.   (and yes, I'll get pictures
>  posted of the new rack and this desk... )  I went with a 30inch x 48inch
>  table top...since I was also trying to cut down on the length of the table
>  to allow more space to get around the rack. (they didn't have any table tops
>  between that size and 5-6 ft, or I would have gone a little bit bigger...
>  but these are just basically booth table tops so there are some standard
>  sizes... and I didn't want to pay the difference it would be to order a
>  custom one...)
>  ANYWAY -- The question.  In the process of moving printers I ended up moving
>  my small laser onto a different power circuit and now when it first kicks on
>  the draw down in power has caused some other machines to power cycle (at
>  best... at worst they just trip off...as if the power browned/blacked out).
>  I'm going to move around some things (i.e. put the rack on the circuit that
>  I pulled all the printers off... ) to resolve the problem, but even so, it's
>  always "dimmed" the lights when it kicks on, so to speak..   I've got it
>  hooked up to a UPS, but that doesn't seem to handle the surge if it's coming
>  from the plugged in devices (handles it if the power goes low from the
>  wall).   Is there any sort of device that could "augment" the power from the
>  wall when this type of surge occurs?
>  'later
>  Earl
>  _______________________________________________
>  rescue list - http://www.sunhelp.org/mailman/listinfo/rescue

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