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SDS speed control

I have a VPI Aries 2 with the SDS. Recently aqiuired a strobe light and disc. However, I can't make the lines stand still. No matter the level of adjustment of the Hz there is a slow spin to the right. Any ideas out there would be appreciated.
drpat
brf
1,715 posts
 
How does the table sound? If the table sounds alright, then perhaps you are using the strobe disc and light incorrectly. What are you using as a light source and strobe disc?
rlw3
39 posts
 
if your wooden/plastic motor spindle the belt touches is the wrong diameter the sds will be adjusted to a level it is not designed for and never settle down. this happened to me. vpi sent me a smaller diameter and cured problem
drpat OP
55 posts
 
Thanks for all the advise/tips. I just got in the mail today a Keystrobe disc and associated Keystrobe Quartz strobe light. Will try it out when home from work. It all sounds good but I want to insure accurate speed with a proper strobe set up. Thanks again.
rodman99999
6,206 posts
 
Shakey- Belt slippage doesn't have to be, "severe" to show with a strobe/disc and not everyone can discern minor speed/pitch variations aurally. The OP did say, "a slow spin to the right."
apbiii
39 posts
 
If the bars move counter clockwise the platter is slow, increase the frequency of the sds to correct. If the movement is clockwise then the platter is fast so reduce the frequency to correct.

If the rate of rotation of the bars does not change when you change the frequency of the sds then that would suggest the the frequency is not changing and something is wrong with the sds.

If you are changing by .01 hz it will take quite a bit to make a visible change on the strobe disk. Try changing the frequency by 5 or 10 hz and see what happens.
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