Re: Spindle Speed with the GS2 Drive

[Jon Elson <elson-at-pico-systems.com>]

Paul wrote:

>Hi Gene
>
>Some good news, and some not quite so good... EMC will control spindle speed 
>via a spare DAC on an STG type card. It is open loop only and is currently 
>set up for +/- 10V control. To add another parameter to the ini file to give 
>a zero point offset would be fairly simple to do. The only danger here is the 
>undefined state of the DAC prior to EMC being initialized might send your 
>spindle of at full speed unless there is an enable input to the GS2.
>  
>
You should ALWAYS use a solid state relay to control the VFD, by the 
start-stop
contacts.  That SSR should also be tied into the E-stop circuits.  When 
you have it
set up right, it should always be in E-stop mode until the computer is 
running EMC.

Jon