Re: [CAD_CAM_EDM_DRO] Re:Re: Encoders

This explanation helps a lot. With my setup the encoders are on the
motor shaft which is directly coupled to the ballscrew. With the
recommendation of .0001-.0002" resolution I'm going to go with 1000 or
2000 count encoders. I made a mistake with a decimal in my movement per
step calculation initially and speed is not an issue. I also tested the
optical limit switches in my Aerotech slides and they work OK.

I'll just have to wait so I can order some encoders unless someone knows
of a place in the Chicago or Rockford area that stock some.

One of the slides needs adjustment of the crossed roller bearings. One
roller set is not aligned to the one on the other side. This limits the
available travel because one hits the limits before the other.

Thanks Guys!

Greg

Jon Elson wrote:

>
> Tony Jeffree wrote:
>
>
>>Tim -
>>
>>With G320 & G340, what is the relationship between the number of steps
>>input, the encoder resolution, and the resultant motor movement? The
>>literature on the Gecko website doesn't seem to make any statements about
>>this that I can find.
>>
>>
>
> With the G320, the steps in = encoder counts. If you give it 1000 steps
> in one
> direction, and the motor has a 250 cycle/rev encoder (which gives 1000
> counts
> /rev) the motor will turn the encoder one revolution, exactly. If the
> motor is
> directly coupled to the encoder, they both move one turn. If the motor was
> driving something with a belt reduction, say, and the encoder was on the
> driven part, then the encoder would make the one revolution, and the
> motor would
> turn whatever amount was needed to make the encoder do that.