Hello friends
I have one ( think helpful suggestion). I am designing some industrial mechanical application. There are very important stiffness. Ron, Aluminum isn�t significant problem because if you have some problem with it I can organize some aluminum detail in Poland (manufacturer have lowest price) but: Lets assume that we want to compare two beam aluminum VS steel with following dimension: 100x80 (mm) WE DON�T CARE AT STRENGTH OR STRESS IN CONSTUCTION !!!!!!!!! first of all we need high stiffness (precision and low time of working) and other condition automatically will be realized. The Young Modules for steel is 300% higher than for aluminum alloy (steel 21e10 and aluminum alloy type 6xxx: 6.9e10) But the density of steel is about 290% higher than for aluminum alloy.( 7.9 VS ~2) Conclusion: When we use the same general dimension of profile and: For example 1 mm thick for steel beam the mass will be almost the same when we use 3 mm thick(300%) for the same general dimension aluminum alloy profile. And mass of both will be almost the same and stiffness will be the same to!! If you see the specialist machines like robots and you see that they are made form aluminum. Remember: that is not alloy aluminum type 6xxx( standard) or 7xxx( really hard for airplanes construction), generally you can get only this types of profiles. For very fast machines like your or robots they use special type of aluminum alloy like Aluminium+Beryl. (they do this only for special order). Generally don�t lose the time. Use steel profile because this is much cheaper and mechanical effect is the same. If you want use aluminum lets do that but generally for nice appearance ;) Mat. turbulatordude <[EMAIL PROTECTED]> wrote: --- In [EMAIL PROTECTED], R Rogers wrote: > Considering the cost and compromise in strength, I would opt for some steel square tube and a buddy with a welder. The aluminum extrusions do look nice though and probably ample for a small gantry router. > Ron > I ran thru this when I designed a router table. The small table top units are about equal with a lot less finish time for the 80/20 When you get into a 4x8ft table and need 20 pieces 4 foot long at $12 a foot, you see a 4 digit price very quickly. Dave 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!? Yahoo! Mail Address AutoComplete - You start. We finish. [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/
