{"id":186,"date":"2009-04-01T22:55:24","date_gmt":"2009-04-02T02:55:24","guid":{"rendered":""},"modified":"2011-05-07T15:46:44","modified_gmt":"2011-05-07T19:46:44","slug":"cnc-beginnings","status":"publish","type":"post","link":"https:\/\/pappp.net\/?p=186","title":{"rendered":"CNC Beginnings"},"content":{"rendered":"\n

The beginnings of my CNC project, in the form of parts for the XY table, and associated tool pile:
\n\"XYParts_sm.jpg\"
\nThe motion capability will be 9” in the X dimension and 6” in the Y direction, the Z axis is on hold until after the semester is over, there just isn’t time to design it in now.
\nDrives:
\nEach axis will be driven by a 130 oz-in NEMA23 Stepper (Lin Engineering 5618S-58-01)
\nThe lead screw to run the axis is a 3\/8” coarse threaded rod, cut to length
\nThe travel nuts are 1.125” coupling nuts (long, to help with backlash<\/a> without spending money)
\nOne remaining problem is couplers for attaching the lead screw to the drive shaft, there are lots of options<\/a>, but they all seem to cost at least $10\/axis. I suspect unless something better appears I’ll end up with lovejoy couplings.<\/p>\n

From aluminum square tubing (1” OD, .062” walls):
\n8”x8” (outside) square frame for Y axis
\n6”x12” (outside) rectangle for X axis
\nThe framing will be assembled with bolts, tabs cut from 90deg angle stock, and a bit of epoxy to make it easier.<\/p>\n

The next big fuss is figuring out the driver circuits. The motors are rated for 2A at any practical voltage, and only show about 2.6Ohms\/coil of resistance, so its going to require proper current-controlled drivers, which may be expensive.<\/p>\n

The thing I’m liking most about this project is that I’m learning a huge amount of practical, hands-on knowledge about metalworking and mechanical devices in a hurry, in a low-investment environment so I can experiment and really get a feel for things. I’m not sure if I’ll ever do much more metalwork, but its a good skill to have.<\/p>\n","protected":false},"excerpt":{"rendered":"

The beginnings of my CNC project, in the form of parts for the XY table, and associated tool pile: The motion capability will be 9” in the X dimension and 6” in the Y direction, the Z axis is on … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,8,37,1,10,12],"tags":[36],"class_list":["post-186","post","type-post","status-publish","format-standard","hentry","category-announcements","category-diy","category-electronics","category-general","category-objects","category-oldblog","tag-cnc"],"_links":{"self":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts\/186","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=186"}],"version-history":[{"count":0,"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts\/186\/revisions"}],"wp:attachment":[{"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=186"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=186"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}