On Saturday 22 June 2013 08:44:01 Marius Liebenberg did opine: > Its not the exact same picture. Many machines have the exact same frame > but has it own branding. Other things that might chance is the start / > stop buttons the color of the machine and other small cosmetics. My > machine is painted green but believe me, its the same machine. I have > seen several variations of the exact same thing. Mine is just a whole > lot older than yours. > > I tried the spring idea but I was not happy with the solution. > > I made motor boxes for all four axis. All of them with a nema 34 and a > 4:1 reduction. I also replaced all the screws with ball screw and nut. > > I have a yahoo group that I use for students that attended my CNC > courses. I will place the design files on and maybe some pictures if you > want. Its really a very simple solution and nothing fancy. I need the > machine to do some specific aluminium parts for which I believe it is > good for. I have milled steel with it before but I felt like the machine > was being stressed so I will stick to softer materials. Well maybe with > the cnc option can afford to take very small cuts on steel and get good > results. Time will tell. > > The groups is at > http://tech.groups.yahoo.com/group/cnc_support
I hate to be a killjoy but in order to see the files Marius, one must be a member of that yahoo group. And you can't join a yahoo group with out adding another 50 spams to your inbox a day. I get enough get rich quick and pecker stretching schemes from this or that magic pill vendor as it is. And huge amounts of it come from yahoo's servers. > I will get some files ready and place them there. > > On 2013/06/22 01:58 PM, Tomaz T. wrote: > > You are saying that you are retrofitting same model of this machine? > > If there is a chance, I would rally appreciate to see design that you > > have. > > > > > > I agree, I was also considering to mount gearing directly on pinion > > shaft that drives quill up and down, but I think there should be some > > decent amount of force applied to quill in one direction (probably > > downwards) to eliminate backlash as much as possible. > > > > I found this thread about retrofitting an old RF mill/drill and he > > also minimised backlash by reversing spring... > > http://www.cnczone.com/forums/benchtop_machines/152240-hf_round_colum > > n_mill_drill_build.html > > > >> I am busy with mine at this very moment. What I did to overcome the > >> quill issues was to remove the hand wheel and spring assembly and fit > >> a motor with reduction directly to the shaft that turns the quill up > >> and down. Mine has a very tight fit and no noticable backlash. The > >> small hand wheel on the other hand was poor. I tried to use the > >> spring to counter the backlash but it was not a good plan. > >> I use nema 34 motors on the whole conversion. If you are interested, > >> I could pass the design files on to you. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> While my BRAINPAN is being refused service in BURGER KING, Jesuit priests are DATING CAREER DIPLOMATS!! A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
