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Forum topic by Jon Cantin posted 08-20-2013 11:31 AM 1005 views 0 times favorited 3 replies Add to Favorites Watch
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Jon Cantin

10 posts in 1647 days


08-20-2013 11:31 AM

Topic tags/keywords: router indexing

I’m working on a new CNC table router design and was wondering how you go about indexing a design so you end-up with a perfect cut across one sheet?

This is for my ShopBot Desktop, I hae 400×500mm working area but my design is 800×500mm so I need to do it in two steps but they have to be dead-on.

Thanks,
Jon

-- Founder of http://CNCKing.com (CNC router, laser, plasma and 3DP project files)


3 replies so far

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REO

889 posts in 1533 days


#1 posted 08-22-2013 12:21 PM

set a stop for your long edge 1000mm long,set up an end stop with a 400mmx 350mm spacer cut on the machine. cut remove spacer cut the second half

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Jon Cantin

10 posts in 1647 days


#2 posted 08-22-2013 02:52 PM

I didn’t think of setting-up a long edge but you are right, otherwise the sheet won’t be perfectly straight at either end of the cut. What is the purpose of the spacer REO?

Jon

-- Founder of http://CNCKing.com (CNC router, laser, plasma and 3DP project files)

View REO's profile

REO

889 posts in 1533 days


#3 posted 08-22-2013 08:51 PM

if you use a precise spacer against the end stop for the first cut and then remove it for the second cut you will have moved the work piece that precise amount for the second cut. in your case the 400mm dim. the travel dimensions of your table restrict you from cutting a 400×500mm piece for the spacer because of the tool offset unless you have a tool that cuts with no kerf. lol. in the 500mm direction you can cut a 400mm spacer as precisely as the machine is capable of.

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