I am starting the process of shopping for conduit.
my plan was to build the cnc to 36x36" but I was looking at different conduit options. If I used a thicker walled conduit I think I can go bigger yes? especially in one direction, I’d love to get 48"x72". It should be easier to keep it ridged if one axis is shorter.
The conduit options as I see them are:
- Ridged Metal Conduit - RMC is the heaviest-weight and thickest-wall steel conduit. http://www.grainger.com/product/GRAINGER-APPROVED-Rigid-Conduit-5ZM30?functionCode=P2IDP2PCP
- Intermediate Metal Conduit — IMC has a thinner wall than RMC and weighs about one-third less than RMC. IMC is interchangeable with galvanized RMC http://www.grainger.com/product/GRAINGER-APPROVED-IMC-Conduit-6XC34?s_pp=false&picUrl=//static.grainger.com/rp/s/is/image/Grainger/6XC33_AS01?$smthumb$
- Electrical Metallic Tubing — EMT. Also commonly called thin-wall. EMT is the lightest-weight steel conduit manufactured. http://www.grainger.com/product/GRAINGER-APPROVED-EMT-Conduit-6XC31?functionCode=P2IDP2PCP
graingers prices seem high but the cost increase is still easy to see. From $10 per 10ft for emt, $26 for imc, and $46 for rmc.
I did see these are available at my local lowes: http://www.lowes.com/pd_73212-1792-103069___?productId=3129621&pl=1&Ntt=3%2F4+conduit
$17 per 10ft, I’d need three of them to make a 4’x6’ which is still very reasonable priced.
That seems like it will be a huge improvement in rigidity, agreed? is there a reason not to use rmc?
What do you think?