Hi to all,
My husband and I have teamed up to build a DIY scanner. I am a web designer, by profession, and hubby (I'll call him 'MJ') is a carpenter/general contractor. My employer has contracted MJ to construct this large format scanner to be able to scan and preserve a series of bound magazine issues, dating back to 1931. These historic magazines need to be carefully preserved by my employer before they get sent to an archival warehouse. The magazines tell a detailed story of the history of this organization, and are deteriorating due to age.
We need the scanner to scan large books 11" x 18". We have built the base and the cradle according to clemd973 (http://www.diybookscanner.org/forum/viewtopic.php?f=1&t=698
) and Daniel's New Standard (http://www.diybookscanner.org/forum/viewtopic.php?f=14&t=333
). We are now building the platen. The problem we are running into is that the platen, being so large, is HEAVY. When built according to the the "New Standard" design, it is too heavy to be lifted properly by the handle. It doesnt slide up the back arm support. So, we deconstructed the platen and reconstructed it using one triangle of plywood, instead of the doubled-glued triangles of MDF. This made it much lighter. We are also thinking of using some sort of counter-balanced pulley or bungee to help with the weight problem.
Does anyone have any ideas how to make the large-format platen slide easily up and down the back arm support?