Yeah, that is common with large plate. It happens at the mill and occurs in lower grades that werent rolled properly. Metal supermarkets buys alot of "shorts" from other companies and alot of times there is no telling what it is. Believe me they knew it wasnt flat and were hoping you wouldnt check. I'd explain your situation and ask for another piece that is flat or your money. If they cant help you contact an outfit in your area that does "burn-outs", they usually have very flat stock on hand. Also , ask them about just cutting you one and having it blanchard ground. It shouldnt be that expensive. That would be a good flat surface to build off of. Also, call some local tool and fixture shops, they often have plates like this laying around that are ground from jobs that were pulled or ordered improperly. They'd probably give it to you. Just an idea on price: I bought a 90" X 50"X 3/4" plate with blanchard grind for $475.00. I'd go for a thickness greater than 1/4". A 1/4" pla te 24" X 24" is suprisingly pretty flexible. Ron
Simon Arthur <[EMAIL PROTECTED]> wrote: I'm trying to install a decent flat, stiff bed on my hexapod. I bought a 24" x 24" x 0.25" piece of steel plate from Metal Supermarkets, but it's not flat. In fact, it curves away about 1/8" at the edges. Is this expected from ordinary steel sheet, or should I demand my money back? How can I get a decent flat bed without spending a fortune for a ground surface plate or spending the rest of my life scraping? Simon Addresses: FAQ: http://www.ktmarketing.com/faq.html FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/ Post Messages: [EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] List owner: [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED] Moderator: [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED] [Moderators] URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO OFF Topic POSTS: General Machining If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble. http://www.metalworking.com/news_servers.html http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list. NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill List Mom List Owner Yahoo! Groups Links --------------------------------- Do you Yahoo!? Jazz up your holiday email with celebrity designs. Learn more. [Non-text portions of this message have been removed] Addresses: FAQ: http://www.ktmarketing.com/faq.html FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/ Post Messages: [EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] List owner: [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED] Moderator: [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED] [Moderators] URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO OFF Topic POSTS: General Machining If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble. http://www.metalworking.com/news_servers.html http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list. NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill List Mom List Owner Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
