I have downloaded the files with the idea of maybe cutting it on my Shapeoko but i am still building it and so far can't even use it
Can you tell me if the dxf files have the dimensions for the acrylic sheet(or let me know what they are) as I will have to hunt some out. I have a couple of sign writer friends who may be able to help there.
Gerry, The acrylic pieces are laid out on a job size of 400x600 mm or 15.748" x 23.622" requiring,
QTY 3 each 3 mm thick pieces
QTY 5 each 5 mm thick pieces
QTY 2 each 10 mm thick pieces
The only thing I think you should consider is if the dimensions of the 3d printed parts will actually hold the proxxon dremel type tool.
After a lot of thought, I finally figured out that there is risk into changing the designs around, as the specs from the instructions and hardware are based upon the thickness of the machined parts.
There is extra space in a couple of the layouts, so I think it would have been better to have given us the file for each thickness so we could re-nest based upon the laser size of each piece.
Yes, I do think you could use birch plywood - wouldn't hurt for a prototype, and you may decide you like the way it looks better. I am using acrylic as I think it will wear better over time.
Machinists build tolerances into their jobs, correct? I don't know how much tolerance is build into the plastic 3D printed items to accept parts that are not meeting the specifications of perspex. I would love to get samples of actual perspex from the UK to put calipers on them, it would be interesting. Perhaps our friends at Vectric will bring some to the USERS Group meeting in Chicago.
Perspex in the UK, is LUCITE in the USA, I called and left a message for someone in Sales at Plaskolite, specifically, where to buy CAST acrylic in the USA, of the specified dimension, still no return phone call 3 days later. The cost to purchase the necessary sized items translated from british sterling pound to us dollar was $188.24 without shipping. Perspex' website directs me to Plaskolite in the USA. The Optix L Series is a continuous cast product.
Leo, I do agree that laser is the preferred method! Although I'm not convinced yet that I couldn't have got by with the extruded from the Lowes, Menards, Home Depot, but when I priced it out, my cost at Auburn Plastics in the Indianapolis area is CAST acrylic and less expensive even with the shipping cost. Thinking I would send the job in larger sheets to the plastics fabricator locally, I ordered sheets that were 24x32. I know Lexan polycarbonate from Menards does not work at the laser at our makerspace. I bought it because it indicated 10 yr limited warranty against yellowing, but the edges turned yellow. Boss Laser does have a guide for its users for different types of materials. I will have to find that before I go back if they laser for me. Should this turn out nicely and looks good, I am sure husband will flame edges for me. I realize the local plastics fabricator may require I purchase their sheet goods, so I've got acrylic for edge lit signs or something in the future then.
I could have missed something, but I basically studied this for about a week, not continuously, but it was the topic of last week for me... so the DIY CNC is a proving concept for me, that I can make my own CNC with instructions, without a huge price, and it may be nice to have a little desktop for 3rd generation to play with. I won't have to be crazy if they put the dremel through the bed of the machine, and doing that to the bed of the 24x40 would make me a little crazy.