Is there a ramp backup delay to get back to full force? I believe I read a new miner takes 7 ish days.
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The ramp is simply spreading out the reward for your shares over the 5Nd after each share is submitted.
The "Time" of the ramp is not a factor in any of the calculations, the ramp is simply 5Nd worth of shares.
How "Long" 5Nd takes depends on the pool hash rate - which at the moment is around 14 days ... ish.
Bit if the pool hash rate increases, the 5Nd time decreases, and conversely, if the pool hash decreases, then the 5Nd time increases.
None of that affects your expected reward.
A short 5Nd ramp up/down means you will be faster to full hash rate but also faster to get down to zero hash rate.
The total you are rewarded is still expected to be the same for the same amount of work you do.
However, assuming the pool hash rate stays at what it currently is - around 24PHs - then the amount of time you ramp down will equal the amount of time it will take you to ramp back up.
That partial ramp down only gets to zero if you ramp down for 5Nd or more (i.e. 500%)
If you ramp down only 1/5 - 1Nd or 100% diff of pool shares - then you'll ramp back up in the same 1/5 - 1Nd 100% diff of pool shares after that - but the times wont be exactly the same - but the expected result is the same.
Another way to look at it would be to say that if you didn't mine for 1 day, your total lost rewards would be expected to end up being the equivalent of 1 day's mining, but the lost rewards would be spread out over the 5Nd from the start of the time you stopped mining until 5Nd after you started mining again
i.e. you get rewarded during the down and back up ramp, but in total yaw expected to lose 1 day of rewards due to not mining for 1 day.