Hello all; I just ordered a sheet of 1/2" thick phenolic to make pcb pallets from, and a foot of 1" acetal rod to make those thermally molded nuts from for my toy mill. Gotta get rid of some backlash if I'm going to etch some more pcb's.
That leaves one other obvious weak point, the length of the sled at the base of the head casting that rides the post, its too short by at least 2 or 3" and gets wedged on the post, leading to stiction & other smooth motion preventing problems. I've a mind to order me a cutter so as to be able to machine the proper angles in a new casting, but have no clue as to the actual angles used in the original 'micro-mill' as sold by HF a decade back. Are they 45 degree, or some other oddball angle? And can I use a flat casting from the local foundry (we have one here) as a starter material, or should I try to find some meehanite someplace? That amount of rod should leave me enough to make some nuts to replace the nook bronze buts in the Z drive too, but since they are adjustable already by differential thread pitches, I feel I need to address the poor head sled design first, as that is much the larger PIMA when trying to do Z moves to .001" accuracy. And whats the best material for the gib strip? I am not impressed with the soft steel now used in these chinese toys. Recycled coat hangers or similar junk IMO. 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> VICARIOUSLY experience some reason to LIVE!! A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
