On Sunday 02 November 2008, John Domville wrote: >Heinz Reimer, > Thanks for the input. I will check into the information you provided. >Seems a shame thought to have to use a counter weight on Z axis as the >system should have been designed to move it own weight. If you have any >pictures on the counter weight you used please send them to me. > >John Domville > >-----Original Message----- >From: Heinz Reimer [mailto:[EMAIL PROTECTED] >Sent: Saturday, November 01, 2008 10:57 PM >To: Enhanced Machine Controller (EMC) >Subject: Re: [Emc-users] Engrave-11 Z test at 50 percent > >[EMAIL PROTECTED] wrote: >> Ok... >> Test one , with the delay/pause ran flauless. ( at 50 % feed over ride) >> >> Part two ( with out the delay/pause) had problems. It made a couple of > >cycles then started the "binding noise" again, on both the up and down >movement of the Z axis. The tool did not stay .500 from the table but moved >closer and closer until I terminated the program manually . Both tests were >run with the AXIS slide bar for FEED OVERIDE at 50%. So where in the config >do I cjhange what? > >> On the main " Driver page" I have the following settings: >> >> Step Time 5000 >> Step Space 5000 >> Direction Hold 20000 >> Direction Step 20000 >> >> and on each one of axis pages there is the following settings" >> >> Motor Steps per rev 200 >> Driver Micro Stepping 4.0 >> Max Velocity 1.0 in/sec >> Max Acceleration 30.0 in/sec. >> Both MAXVEL and MAXACCELERATION are likely too fast, that vel corresponds to 60 ipm, and my machine, with 20 tpi screws, direct coupled, is about tapped out at 20 ipm. Reduce that to say 0.25 for starters, it can always be raised later.
MAXACCEL here is in the 3 range So you are trying to adjust a motors speed 10 times quicker than I can without problems. Try 2.5, it can always be raised. My machine (Harbor Freight Micromill) may have slightly bigger motors. And you can see my (West Virginia engineered) solution for a head counter springing method at <http://gene.homelinux.net:85/gene/emc>, also the rest of the mess and mods to it, including a whole new z drive method. The micromill has what I'd call a design flaw in that the z drive screw is behind the post, like the Sherline, which puts all the binding forces directly into the gibs. My setup originally would bind up a 425 oz motor at 5 pounds of downforce. What you see now can put 155 pounds on a drill bit. >> John > >------------------------------------------------------------------------- >This SF.Net email is sponsored by the Moblin Your Move Developer's challenge >Build the coolest Linux based applications with Moblin SDK & win great > prizes Grand prize is a trip for two to an Open Source event anywhere in > the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ >_______________________________________________ >Emc-users mailing list >Emc-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/emc-users -- 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) The trouble with heart disease is that the first symptom is often hard to deal with: death. -- Michael Phelps ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
