I would try to stay with the original specs re the light bulbs. I
run TLK 40W/10-R UVA (made by Light Emission Technologies) on my
A&V Orbital. Takes a good long time to run them down. Whatever
bulb you use you can get them in bulk at good pricing from Atlanta
Light Bulbs (there is a link to them on site). Stay away from back
exposing, you are just adding another variable to the equation.
Rather than buy another used machine why not just upgrade what you
have? new bulbs all around, new brush, new ballasts. That should
pretty much take care of the major issues regarding exposure and
washout. Best ballasts are Rocket 5s. They are fairly inexpensive.
Holy Grail according to A&V. Not had any problems with them.
Best to replace all though especially if they are old. Rocket 5s
feed two bulbs at once so some rewiring might be in order.
If you have a dirty floor that could be a combo problem of exposure
and washout being out of sync. Best solution. Get your exposure to
spec with the Gray Scale then slowly increase the washout time until
the floor is clean and the relief is not undercutting. Should be
smooth sailing, day after day after day, once these are in sync.
On 7/19/12 6:00 PM, Ian Bristow wrote:
I managed to get the original bulb type which is Philips
TL8W/05 67 Made in Holland. I tried to replace the bulb with a
Hitachi F8T5 8 watt bulb.
While the exposure seems to work there is an issue with
cleaning all of the polymer (not a clean floor) perhaps these
KF 95's do not need the back exposure
after all?? with the original bulbs I have been back
exposing and then exposing according to boxcars instructions.
Maybe the newer bulbs are more powerful thus causing
this problem to occur. I will test a strip tomorrow without
On another note I maybe looking at upgrading the machine.
Does anyone know of anywhere to buy a reasonably priced
platemaker. I do not have any contracts with apple
or anything like that so something used or refurbished
would be great.
Thanks again for all of the advice so far!!