[Emc-users] Encoders with steppers

2007-08-15 Thread Michel Gouget
Dear All, I am considering adding encoders and home switches to my Sherline CNC mill. I see 2 benefits: 1) Being *sure* of not loosing steps (estop, ...) 2) Using (low precision) home switches and the index of the encoder, I get *excellent* repeatability when homing. The mill is equipped with

Re: [Emc-users] Encoders with steppers

2007-08-15 Thread Lester Caine
Michel Gouget wrote: Dear All, I am considering adding encoders and home switches to my Sherline CNC mill. I see 2 benefits: 1) Being *sure* of not loosing steps (estop, ...) 2) Using (low precision) home switches and the index of the encoder, I get *excellent* repeatability when homing.

Re: [Emc-users] Encoders with steppers

2007-08-15 Thread John Kasunich
Michel Gouget wrote: Dear All, I am considering adding encoders and home switches to my Sherline CNC mill. I see 2 benefits: 1) Being *sure* of not loosing steps (estop, ...) 2) Using (low precision) home switches and the index of the encoder, I get *excellent* repeatability when homing.

Re: [Emc-users] Encoders with steppers

2007-08-15 Thread Alex Joni
I'm sure there is a way to solve that problem, but nothing springs to mind right now. how about a long limit switch (between 2 encoder indexes), just use a latch to toggle the state. to summarize: actual switch AND encoder index - toggle signal for the latch. latch output - emc home-sw

Re: [Emc-users] Encoders with steppers

2007-08-15 Thread RogerN
- Original Message - From: John Kasunich [EMAIL PROTECTED] To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Wednesday, August 15, 2007 8:59 AM Subject: Re: [Emc-users] Encoders with steppers snip PID's response to feedback falling behind command is to drive