Dynomotion

Group: DynoMotion Message: 13136 From: daveymahomh600e Date: 4/12/2016
Subject: Kanalog DAC Settings for Speed Control

Hi Tom,


I'm trying to setup a Kanalog DAC output for feeding a VFD 0-10V input via the "S" command. There doesn't seem to be enough information on how to properly set the min and max values in the KMotionCNC tool setup window M0-M30.


The default value for max for the "S" command was 1024. Does this relate to +10V? Does "zero" for the min value represent 0V or is it -10V?


Thanks,

David.
Group: DynoMotion Message: 13137 From: Tom Kerekes Date: 4/12/2016
Subject: Re: Kanalog DAC Settings for Speed Control
Hi David,

Kanalog DACs have an inverted output so negative count values make positive voltage. So use a negative scale value. The magnitude will depend on your system. Set Max to 0 counts and Min to -2047

Regards
TK

On Apr 12, 2016, at 8:03 AM, david.m.stevenson@... [DynoMotion] <DynoMotion@yahoogroups.com> wrote:

 

Hi Tom,


I'm trying to setup a Kanalog DAC output for feeding a VFD 0-10V input via the "S" command. There doesn't seem to be enough information on how to properly set the min and max values in the KMotionCNC tool setup window M0-M30.


The default value for max for the "S" command was 1024. Does this relate to +10V? Does "zero" for the min value represent 0V or is it -10V?


Thanks,

David.
Group: DynoMotion Message: 13138 From: David Stevenson Date: 4/12/2016
Subject: Re: Kanalog DAC Settings for Speed Control
Hi Tom,

Thanks very much. That did the trick.

Regards,
David.

On 4/12/2016 12:00 PM, Tom Kerekes tk@... [DynoMotion] wrote:
 
Hi David,

Kanalog DACs have an inverted output so negative count values make positive voltage. So use a negative scale value. The magnitude will depend on your system. Set Max to 0 counts and Min to -2047

Regards
TK

On Apr 12, 2016, at 8:03 AM, david.m.stevenson@... [DynoMotion] <DynoMotion@yahoogroups.com> wrote:

 

Hi Tom,


I'm trying to setup a Kanalog DAC output for feeding a VFD 0-10V input via the "S" command. There doesn't seem to be enough information on how to properly set the min and max values in the KMotionCNC tool setup window M0-M30.


The default value for max for the "S" command was 1024. Does this relate to +10V? Does "zero" for the min value represent 0V or is it -10V?


Thanks,

David.



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