Dynomotion

Group: DynoMotion Message: 15329 From: Tom Kerekes Date: 1/22/2018
Subject: Re: Bode Plot window issue - Stats line intermittently flashing and
I assume you mean where it reports the 0db Cross Over, Gain Margin, Phase Margin.

The program uses a simple running average (of +/- 10 points) to find the crossover frequency.  So it starts looking at ~60Hz.  If your bandwidth is less than that or has other issues it won't find the crossover and won't report any values.  You can still get all the values yourself by eyeballing the crossover, gain Margin, Phase margin etc which is usually a good idea to do anyway and not trust what the algorithm finds.  Especially on noisy data.

Regards
TK

On 1/22/2018 1:07 PM, yatesgreg@... [DynoMotion] wrote:
 

When running tests using the Bode Plot window, the Stats line is intermittently flashing and disappearing. It is remaining hidden. Initially I thought it may be out of range values causing it to be blanked but once the servo loop was in spec the information is remaining hidden.


Win 10 & KMotion 4.34j



Group: DynoMotion Message: 15330 From: yatesgreg@qty1.biz Date: 1/22/2018
Subject: Re: Bode Plot window issue - Stats line intermittently flashing and
That would explain it, 45 Hz crossover