Rotate Oscilloquartz 8600 BVA oscillator


This is a 1000 s run where once a minute I rotated the BVA 90 degrees to each of its 6 axis. You can see it's quite different depending on which side faces down.


I made an automatic stepper motor vertical turntable gizmo and this allows me to smoothly run through full 360 degree turn(s) hands-free. At slow speed it's one turn every 400 seconds. There is some level of mechanical chatter in the platform at this speed which shows up as short-term noise in the BVA. But the overall sinusoidal pattern over two turns is quite nice.


This is at a higher speed where each rotation is 100 seconds. We see 5 turns clockwise followed by 5 turns counterclockwise.


I made two short videos of the stepper in action. This image is the TimePod / TimeLab trace made during the video. A BVA has greater sensitivity in the vertical rotating configuration than in the horizontal rolling mode.


The videos are 20 MB each.

1st video:

www.leapsecond.com/tmp/IMG_4992.MOV


2nd video:

www.leapsecond.com/tmp/IMG_4996.MOV


/tvb