search

Pwdr / Pwdr-Model-0.1

A powder substrate rapid prototyping machine
131 stars 68 forks source link

Laser cut Acrylic #36

Open ChinaShopBull opened 8 years ago

ChinaShopBull commented 8 years ago

Do you have any advice for someone in the United States for modifying the design to accommodate the sizes of acrylic sheet that are available here? It turns out that 4.5 mm and 9 mm are the most common sizes close to your spec. I don't really relish the idea of redesigning the chassis, and I'm wondering if I can get away with sanding down some of the tabs to fit, or adding shims where necessary.

MatthiasWM commented 8 years ago

On May 10, 2016, at 2:17 AM, ChinaShopBull notifications@github.com wrote:

Do you have any advice for someone in the United States for modifying the design to accommodate the sizes of acrylic sheet that are available here? It turns out that 4.5 mm and 9 mm are the most common sizes close to your spec. I don't really relish the idea of redesigning the chassis, and I'm wondering if I can get away with sanding down some of the tabs to fit, or adding shims where necessary.

I did redesign most of the part, but unfortunately not for U.S. sizes, but for different metric sizes.

I agree that this is annoying, but it is relatively easy to do if yu have somewhat of a feel for CAD. Sure, you can also sand and shim, but modifying the CAD data seems much less work. Acrylic is almost impossible to sand, and shims will make everything weak.

You are probably fine if all you do is change the size of the slots. No real need to lengthen or shorten the tabs.

There are few truly citical parts. Make sure that the pistons still fit inside the cylinders.

Pwdr commented 8 years ago

Fully agree with MatthiasWM.

If you don't have access to CAD, you could even change the SVG/DXF with a vector editor, as only the slots need to be changed.

On Tue, May 10, 2016 at 10:55 PM, MatthiasWM notifications@github.com wrote:

On May 10, 2016, at 2:17 AM, ChinaShopBull notifications@github.com wrote:

Do you have any advice for someone in the United States for modifying the design to accommodate the sizes of acrylic sheet that are available here? It turns out that 4.5 mm and 9 mm are the most common sizes close to your spec. I don't really relish the idea of redesigning the chassis, and I'm wondering if I can get away with sanding down some of the tabs to fit, or adding shims where necessary.

I did redesign most of the part, but unfortunately not for U.S. sizes, but for different metric sizes.

I agree that this is annoying, but it is relatively easy to do if yu have somewhat of a feel for CAD. Sure, you can also sand and shim, but modifying the CAD data seems much less work. Acrylic is almost impossible to sand, and shims will make everything weak.

You are probably fine if all you do is change the size of the slots. No real need to lengthen or shorten the tabs.

There are few truly citical parts. Make sure that the pistons still fit inside the cylinders.

— You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub https://github.com/Pwdr/Pwdr-Model-0.1/issues/36#issuecomment-218288498