Re: [CAD_CAM_EDM_DRO] Re: Servomotor w/Enc. Part II

In addition to what Jon mentions I would recommend www.usdigital.com as the
source for encoders. One other point is that the Gecko 320 have a maximum
rating of 50 ma for the quadrature encoders. Current drain over this could
cause failure of the Gecko 320.
Most encoders using the HEDS 9100 read head will work fine at well below the
max current requirement imposed by the gecko 320's.
Dan
-----Original Message-----
From: Jon Elson <jmelson@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Wednesday, January 24, 2001 10:24 PM
Subject: Re: [CAD_CAM_EDM_DRO] Re: Servomotor w/Enc. Part II

>
>
>Tom Csibor wrote:
>
>> Along the same lines as this thread, I have just recently purchased 3
>> of the same 320 Gecko drives to retrofit my mill. The current
>> encoders (really resolvers) need to be updated. Can anyone give me
>> some advice as to the type of encoder and possible sources that would
>> work well with the 320 drives?
>
>Any digital encoder, either linear or shaft, should work. Especially,

those

>with TTL outputs and 5 V supply voltage would be the best fit. You want
>a reasonable resolution, somewhere between 2000 counts/inch as an
>absolute minimum, and 20000 counts/inch max. If you have too high
>a resolution encoder, the CPU will be overloaded cranking out step
>pulses, and even a small following error will overrun the 128 count
>maximum following error on the Gecko, and it will fault.
>
>Jon
>
>
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