The mill is brand new. The test eas conducted "unloaded" as such. I prefere to believe it is the velocity ot some stepper setting. It does not "bind up" anyother time except during this test. Thanks for the input though.
John John Kasunich <[EMAIL PROTECTED]> wrote : > John Domville wrote: > > Lawrence G > > Ok, I finally got around to running the test you suggested. The first > > couple moves (test #1) up and down > > Are ok, but after that the tip gets lower and lower into the piece. Also > > the motor makes a binding noise just > > Before it starts screwing up. Sounds like the motor is trying to move two > > opposite directions at the same time. > > Never did get to test two. So where do we go now? This by the way is > with > > a config file that uses + as a Z axis up > > And - as a Z axis down. Had a pencil stub loosely in the collet during > the > > test and it kept getting pushed further and further > > Into the collet until I forced a stop to the program before the face of > the > > collet went in to the bed surface. > > > > John > > You are losing steps (stalling the motor) when trying to lift the head. > I assume that your machine doesn't have any kind of head counterweight, > so it is a lot harder to lift it than to lower it - that is why you have > problems going up only. > > Things to try: > > 1) make sure nothing is binding - is the screw lubricated? are the ways > lubricated? > > 2) reduce the Z axis acceleration - starting more gently will help the > motor lift the load > > 3) reduce the Z axis max velocity - steppers get weaker when you run > them faster - keeping the speed down will give you more torque. > > 4) counterweight the head to reduce the load > > 5) get a stronger motor or drive for the Z axis > > Regards, > > John Kasunich > ' > > ------------------------------------------------------------------------- > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
