Been using the P1006 for several years now. I use the 1200 dpi setting and turn off the toner save feature. I made a new setup, preferences, Print Task Quit Set, with these setting so I don’t have to remember, also have one set for mirror printing, to get the top and silk layers in PCBExpress.
Registration by running the sheets twice is likely an impossibility.
A few tricks I learned,
I have a four roller laminator, 2 before heater, 2 after. I changed the motor so it runs very slow, takes a 4” board over a minute to go thru. adjusted the spring tension as low as it would go and still feed the board, reduced spread.
I use a temperature of 115 deg. C. actually cycles between 110 and 120, the temp sensor is on the lower roller, takes that long to see a temp. difference when running that slow.
Sand board with random orbital sander, 400 grit, to remove all oxide, and surface blemishes.
Clean board with lacquer thinner, apply very liberally, allow to dry completely, this reforms a thin even oxide layer, this oxide layer gives the toner something better than bare copper to adhere to. Read that they form an oxide layer on the copper to help adhere it to the FRC substrate. This is what allows me to run the laminator at 115 deg. C, instead of the 150 deg. C needed without cleaning with lacquer thinner.
Make boards about 1/4” larger than needed, toner does not seem to adhere as well next to the edges.
Don’t tape the art work onto the board, just hold with fingers and feed into laminator. the taped parts don’t transfer well, and the goo is a pain to remove.
I use two or three passes thru the laminator.
Sand the paper artwork lightly with 100 grit sand paper, after going thru the laminator. Gives the tonner a time to cool and allows the water to penetrate faster, just a few seconds and the paper is translucent. I use Hammermill Color Laser Gloss Paper. Lowest cost best transfer. Roll the paper off with fingers, very lightly clean bits of paper off with nylon abrasive pad.
I get very repeatable results with traces down to .5 mill for 100 pin smt parts.
RD