printing problems
printing problems
(OP)
It would seem that when i try to print full scale drawings with a hp 750 line printer that the width of the part is correct but the lenght is off by quite a bit. about 10mm on a line that should be 735mm long. Anyong have a guess as to why.
thanks in advance.
thanks in advance.






RE: printing problems
Regards,
Scott Baugh, CSWP

http://www.3dvisiontech.com
http://www.scottjbaugh.com
FAQ731-376
RE: printing problems
Changing the settings should do it? The reason I ask is because our shop is looking at buying a plotter. So for a test to see if it would suit our purpose i had a printing shop print a part for me. but i need the printed part to be quite accurate, is this possible with a large format printer?.
RE: printing problems
RE: printing problems
RE: printing problems
The Overlay was made by me according to calculations that I was given. I made configurations of the part and showed them in a drawing, giving the outside and inside allowable varations. Including the nominal area.
The parts were very accurate but the problem came to printing them out on, and now old plotter (HP 350C). I made a 1 x 1 box in the upper right corner. I messed and messed with the printer settings and the page settings till I got the right accuracy. Once that box measured 1 x 1 then I knew I had it. It wasn't something that came easy, but that's really the only way to find it. Is by continuing to play with the settings. Maybe 100% isn't good enough try going up or down. But use something like a box, so it makes it easier to measure. Then step up once you get that far.
As in the movie "What about Bob?" ------> Baby steps
Regards,
Scott Baugh, CSWP

http://www.3dvisiontech.com
http://www.scottjbaugh.com
FAQ731-376
RE: printing problems
RE: printing problems
We have need to plot very accurate optical targets and other things from time to time, so we always go through a plotter calibration check first.
(Note that although the paper is "flat" going through the plotter, the upper surface speed/distance is dependent on the total effective radius to the paper surface - ie. the roller radius plus paper thickness.) The rollers are not very large, so even a few thousandths of an inch difference in thickness can make a significant change in the total plot length.
The usual process is it prints a cal plot that has two lines of a supposed length - one longwise, one crosswise. You measure them and enter back in the actual length. The plotter than adjusts and stores the new settings. It then plots a new cal plot and you ususally have to go around two or three times depending on how accurate you want it.
John Richards Sr. Mech. Engr.
Rockwell Collins Flight Dynamics
There are only 10 types of people in the world - those who understand binary and those who don't.