How necessary is a vibration table?
We originally purchased our OneMP with a vibration table (Everstill K-400) and have always used the table during measurements. Over the past couple weeks, though, I’ve tested making measurements with the table off and have noticed no difference in the recordings. In fact, I was able to obtain an accurate reading of a 40-50 kDa sample quite well (an exceedingly clean glass and PBS blank helped). Does the apparent lack of impact of the table on measurement accuracy simply mean that the bench where our device rests is solid enough to not warrant a table?
I should also note that, when the table is on, I always notice that even light taps to the work surface are observable in the blue trace in the radial profile monitor, making me suspect the table’s antivibration efficacy. But I later understood this to be normal as the table is intended only to counteract low frequency vibrations, not those associated with a local disturbance. Is it indeed correct that neither this table nor the one sold today with the TwoMP is intended to counteract table bumps?
Hi Chase,
If turning off the anti-vibration table doesn't affect the focus position fluctuation, it means your bench is very solid! You're correct that the anti-vibration table only counteracts building vibrations or low frequencies from nearby equipment. We still wouldn't recommend leaning against the bench, or tapping the table as these actions introduce vibrations that can't be isolated by the anti-vibration table.
Amy
Sr. FAS