Re: missed step detector

I'm working on such a thing at this time,
but what I'm doing ( attempting to do ) is read
a encoder form the lead screw to measure distance traveled
and compare that to where it should be
using a pic16F84 on the step line for the axis.
if it gets xx distance out it will trip my limit switch.
a that point I rehome and pick back up at the line of g-code
where it left off.
not working real good at the time probably the old
mouse parts I'm using as the encoder from the lead screw.
Henry ( WoodDragon )

----- Original Message -----
From: Chris Paine <chris@...>
To: <CAD_CAM_EDM_DRO@onelist.com>
Sent: Sunday, October 10, 1999 6:46 PM
Subject: [CAD_CAM_EDM_DRO] missed step detector


> From: "Chris Paine" <chris@...>
>
> While attempting to connect up a disk drive to run the stepper motor as
> previously suggested by Arnie, I thought supposing you have "large"
stepper
> to move your machine and the the board and stepper from a disk drive and
> have both connected. If you then go for the simplest solution fit a dial
and
> pointer to to both motors , mark out and number the steps or every 10 if
> convenient the the almost no load small stepper should make no errors and
> can be compared to the main one any time the machine stops. due to murphys
> law the no of steps per turn will be different for each motor so you may
> have to mark your dials to reflect this or divide the signal supplyed to
the
> small stepper You could get clever using lights shining through holes in
> disks as a lost step warning device or even to generate the lost step but
> then its lost the advantage of easy and very cheap.
>
> > Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the
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