Re: [CAD_CAM_EDM_DRO]thanks & more

Hi All:
      THANKS JON for the update. I am not an EMC man so I didn't know it would do this.  That Would be a good way to go.  While I have you attention what do you know about DC drive motors?  I just found out the 10 HP motor in the lathe I purchased last month has a DC varispeed drive motor in it.  That is why it has a separate cooling fan beside it.  I have another motor control panel I need to check out first before I can as questions.  Need to know all about what I have.  (two pick up loads of electrical stuff)
     Is anyone still using punched tape?  I found a brand new tape reader sealed in plastic wrap in the original box.
                                                                                            GOD'S BLESSINGS
                                                                                                   Bill

On Thu, 13 May 2010 21:01:26 -0500, Jon Elson wrote

>  
>
> William Thomas wrote:
> > Hi John:
> > Your IDEA of having the scales and the encoder of the same or multipale units of division I think may work. In the past the idea of one system matching or checking the other gave problems of the drive unit hunting to find the right position.
> No, EMC can easily handle two different resolutions of feedback. The
> basic scheme is you use the linear scale for position and the shaft
> encoder for velocity. The method used on Stuart Stevenson's G&L mill is
> in the EMC wiki. You can't do this with breakout boards, though. You
> need to provide a system for feeding many encoders into the computer.
> Generally, an encoder counter board of some type would be the way to
> go. For a 3-axis mill, you'd then need 6 encoder inputs.
>
> Jon
>
>

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