On Tue, 10 Feb 2004 12:44:10 -0600, Larry Miner
<
larry.miner@...> wrote:
> Stefan,
>
> I know that the same approach is used in HP (and others) Laserjet
> Printers,
> meaning that for HP they 'cycle' the heater-bulb on-then-off to keep the
> fuser at a certain temperature while idle, using a thermostat
> arrangement.
> Some others just keep the light bulb at partial voltage to keep it
> warm. A
> partial-on bulb can last a very long time, but you use a lot of
> electricity
> and give off a lot of heat. HP (those engines are actually made by
> Cannon
> for HP) cycles the bulb to keep the temperature, then turns it on full
> blast
> during the fusing pass as the material "pulls the heat out of the fuser".
>
> Your process sounds exciting. I will look forward to pictures if you can
> share them.
>
>
> Sincerely,
>
> Larry Miner
> larry.miner@...
> Sandcarving / Glass Awards / Digital Photography
>
>
I know, i can observe the HP fuser through a vent hole in the back of the
printer...
I just wondered because it is said not to have this small halogn spot lamps
burning on half power all the time.
I know that indescant bulbs last forever if you run them on less than
rated voltage.
(Do you know the trick with the diode in series - you will never again
change the
bulb, but it will be much less efficient. Still it may be of use where the
lamp
is rarely used (or only short time) and very inacessible to change.)
I noticed that the pcb is nearly no load for the fuser, it is 5mm thick
aluminium tubing, so the capacity is enough for the job (the HP printer
fuser
is only 1.5mm).
I have no idea what to do about the motor so far. i have to inspect the
brushless
thing and see if i can put it to use, or i will search for another heavily
geared motor.
I would upload pictures, but i have no digital camera, i have a really
bad webcam with loads of noise, maybe i can make some pictures with it.
I need to get a digital camera some day i know... maybe at ebay..
what do you think is the minimum resoultion it would need for such things
like this? (reading you have some understanding of digital photography)
thanks,
ST