I’ll post some pictures soon.<\/a> The detail was excellent.<\/p>\nI think I may still have a little drag on the axis screws. It didn’t bother the CNC work this weekend. I have some spray bearing grease I will inject behind the Thrust bearings and see if the intermittent slight rubbing noise goes away.<\/p>\n
If the grease doesn’t help, I already have a plan to put a “step” at each end of the screws and just remove the thrust bearings. That way the only thing the screw end can contact is the center race of the bearings.<\/p>\n
That’s what I should have done in the first place. I did find out how easy it is (when you have a lathe) to modify the ends of the axis screws.<\/p>\n
How I noticed what may be the rub is I changed my micro-stepping from quarter to eighth. I now run 8,000 steps per inch rather than 4000. That’s 0.000125 inches\u00a0per step, way too fine than really useful\u00a0. This was done not to increase accuracy but make the steppers run a lot more quite (but also a lot hotter).<\/p>\n
Quarter stepping\u00a0was still more accuracy (0.00025″) than I needed and it is supposed to provide more torque. The motors run cool. The noise however is\u00a0more than\u00a03 db higher and the twin Y’s were driving me crazy with their loud sound. Now I hear a sweet soft tune.<\/p>\n
I had to bump up the stepper frequency in the software\u00a0but that was no challenge for the computer I use to run MACH3.<\/p>\n
All these things are minor tweaks, even the rubbing, but that’s part of what I like to do. It’s like writing computer code, the work is never complete. Always one more detail to add or I feel a need to “tweak” something.<\/p>\n
Yes, I am having fun<\/p>\n","protected":false},"excerpt":{"rendered":"
I had a great weekend. I had to mow the grass but that is expected and still makes for a great weekend. For this Blog it was great because I got to put a lot of run time on the HB2. About six hours in total. I even ran the Mayan calendar in a 7.75″ […]<\/p>\n","protected":false},"author":77778,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[35],"tags":[138,17,19,139,21,23,39,24,57],"class_list":["post-1021","post","type-post","status-publish","format-standard","hentry","category-home-brew-2","tag-cnc","tag-computer","tag-engraving","tag-hb2","tag-hobby","tag-lithophane","tag-mach3","tag-machine","tag-steppers"],"_links":{"self":[{"href":"https:\/\/blog.thehobbyistmachineshop.com\/index.php?rest_route=\/wp\/v2\/posts\/1021","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.thehobbyistmachineshop.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.thehobbyistmachineshop.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.thehobbyistmachineshop.com\/index.php?rest_route=\/wp\/v2\/users\/77778"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.thehobbyistmachineshop.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1021"}],"version-history":[{"count":0,"href":"https:\/\/blog.thehobbyistmachineshop.com\/index.php?rest_route=\/wp\/v2\/posts\/1021\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.thehobbyistmachineshop.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1021"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.thehobbyistmachineshop.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1021"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.thehobbyistmachineshop.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1021"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}