Re: [Emc-users] Random Direction Changes

2010-04-03 Thread darcys...@gmail.com
Just to follow up on this earlier post. But, I'm taking a bit of a wild guess and thinking that you are only driving ONE of the motor's two phases. This was indeed what the problem was. Using the method Jon suggested (below) we found there was no power coming into one phase of the motor. We

Re: [Emc-users] Random Direction Changes

2010-03-30 Thread Slavko Kocjancic
darcys...@gmail.com pravi: Hi all, I am experiencing some odd direction changes on a home-brew CNC machine that I have on loan. The machine was apparently purchased off ebay, and all the settings I dug out from data sheets for the driver chips and motors. X and Y are working well, but

Re: [Emc-users] Random Direction Changes

2010-03-30 Thread John Harris
. - Original Message - From: Slavko Kocjancic esla...@gmail.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Tuesday, March 30, 2010 2:23 AM Subject: Re: [Emc-users] Random Direction Changes darcys...@gmail.com pravi: Hi all, I am experiencing some odd

Re: [Emc-users] Random Direction Changes

2010-03-30 Thread darcys...@gmail.com
Subject: Re: [Emc-users] Random Direction Changes darcys...@gmail.com pravi: Hi all, I am experiencing some odd direction changes on a home-brew CNC machine that I have on loan. The machine was apparently purchased off ebay, and all the settings I dug out from data sheets for the driver

[Emc-users] Random Direction Changes

2010-03-29 Thread darcys...@gmail.com
Hi all, I am experiencing some odd direction changes on a home-brew CNC machine that I have on loan. The machine was apparently purchased off ebay, and all the settings I dug out from data sheets for the driver chips and motors. X and Y are working well, but Z (which has a similarly spec'ed

Re: [Emc-users] Random Direction Changes

2010-03-29 Thread Chris Radek
On Mon, Mar 29, 2010 at 10:26:28PM -0400, darcys...@gmail.com wrote: The basic behavior is that when you push the jog button in a certain direction you don't know which direction it will go. It will maintain it's course in that direction, but when releasing the button and pressing it

Re: [Emc-users] Random Direction Changes

2010-03-29 Thread Rafael Skodlar
darcys...@gmail.com wrote: Hi all, I am experiencing some odd direction changes on a home-brew CNC machine that I have on loan. The machine was apparently purchased off ebay, and all the settings I dug out from data sheets for the driver chips and motors. X and Y are working well,

Re: [Emc-users] Random Direction Changes

2010-03-29 Thread Jon Elson
darcys...@gmail.com wrote: Hi all, I am experiencing some odd direction changes on a home-brew CNC machine that I have on loan. The machine was apparently purchased off ebay, and all the settings I dug out from data sheets for the driver chips and motors. X and Y are working well, but