Talk:SAE Prusa Mendel

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Could this be merged with Prusa Mendel by providing the options for metric and imperial under the Bill of Materials? I'm working on documenting Prusa right now and I'm not a big fan of having to do the extra effort to keep the 2 pages in synch because we've forked this. --TheOtherRob 16:10, 18 November 2010 (UTC)

Because the SAE version currently assumes only 2 size fasteners (#6 and m3) and it only uses 608 bearings, I think it's worth having a branch. But There will be a LOT of commonality between the 2. People are easy to confuse, and if you start giving instructions with a lot of cheviots, you get nasty emails :--Spacexula 22:32, 18 November 2010 (UTC)

What size is a no. 6 SAE screw? I want to print an SAE set but the holes sizes in the stock metric config are way too big for my machines so I can't trust the SAE config.--Nophead 16:26, 16 January 2011 (UTC)

http://www.csgnetwork.com/screwinfo.html says size 6 is 0.138 inches (for the screw) or 0.146 (for the hole) Bushing 07:45, 21 January 2011 (UTC)

Is there a page with the SAE conversion for the Wade's Extruder? This list use SAE parts for the everything but the extruder, but metric for the extruder? http://shop.threadshop.us/Hardware-Kit-Vitamins-for-SAE-Prusa-Mendel-Metric-Wades-1.htm It would be nice if it were all SAE.

Part Numbers

What are the part numbers good for without knowing the store they are from? --Tagno25 16:43, 3 March 2011 (UTC)

They are all McMaster parts. http://www.mcmaster.com/

washer size

One RepRapper suggested

  • 1/4" washers 90126A029 1 (Yes, 1/4" washers fit over a 5/16 rod, and the 5/16 washers are too big for some areas of mendel.)

Is this alluding to the "Binding issues with Z leadscrew/washers" problem[1], or is there some other problem with 5/16" washers?

Another RepRapper changed[2] that to

  • 5/16" washers 90126A030 1 ( 1/4" washers need drilling out to fit over the rods )

Is this alluding to the problem mentioned at SAE Mendel -- ( "I had to mount them in my drill press and file down the threads by a hair" ) -- or is there some other problem with 1/4" washers?

Is there some way to tweak the design so we could use the same size washer everywhere? --DavidCary 18:41, 5 June 2011 (UTC)

In my experience, the 5/16" washers are too large in multiple places - they don't sit flat in the concave parts of the vertexes and they rub on the outer races of the skate bearings. The 1/4" washers that I got fit great over the 5/16" inch rod. Maybe the RepRapper who changed it a second time bought higher-tolerance washers than I did. I'll add a section as a heads-up --JS 14:56, 9 June 2011 (UTC)

Cad Files

I am an Autocad Modeler and would like to contribute Printed Part models for this project. How can I add my models to this page? Here's an example frame-vertex-foot.dwg Sept 14 2012