newRPL keyboard overlay

[lmamakos]

Thanks for the kind words! From my measurements, 50g keyboard seems to have the same dimensions as the 39gs/40gs calculators do, so you can maybe use that to confirm the dimensions are working out as expected.

There's a slightly updated version at https://www.transsys.com/images/newRPL/k...00-dpi.png in which I adjusted the spacing of the key rows slightly as well as adjusting the opening of the holes for the keys. I noticed some binding in some rows when I depressed some of the keys, as they rotate towards the top of the case and there was insufficient clearance.

The printed background for the calculator keyboard overlay should be exactly 110mm, so you may need to tweak the scaling slightly to achieve that. The critical dimension is the height to ensure the spacing between the rows is correct.

As you apply the sticky vinyl after you print it, I've found it best to sort start at the bottom, ensuring that there's as little space as possible between the bottom of the keys and holes in the overlay; this is to ensure there's adequate gap at the top of each key to avoid interference when you press the key and it moves slightly forward.

My conclusion is that using a laser printer on the vinyl isn't ideal without some sort of covering to protect the toner. It will flake off if you flex the vinyl, and I get unsightly white edges showing where the cuts are made. I've not tried an inkjet printer, but I suspect that the ink probably adheres to the printable vinyl better.

(Ooops, just noticed I forgot to update the version number on the back sticker... oh well..)