1637
Bronze Member
- Joined
- May 26, 2011
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- Location
- tujunga ca
- Detector(s) used
- xlt mxt gmz and now a gmt whites
- #1
Thread Owner

so after another sleepless nite ,i came up with this word, gravity line, its a measurement in degrees from the bottom of one rifle to the top of the next one.if you set it at 0 ,then the wider spaced tray has to run at less angle.on mine its about 2 in. in angle.so with the wider rifle you have less angle to help move the dirt and more dirt to move.if you go pass o on the gravity line is when you get bare spots.the left one is 31/8in and the right one is 2in.you can go less but just not more than 0 degrees .oh well iam going to bed.Puffer dry washers and mostly coarse feed (gravel) do not get along. There is virtually no sealing of the gaps between the pieces making the puffs ineffective and the gravel hardly moves. I found that recycling some tails to the feed supplies enough fines to get everything working again and moves the gravel down and out of the sluice. Wide apart riffles also can create a bare space on the higher end below that riffle that can cause the puffs to be ineffective by allowing air to easily pass through it....flowing air seeks the path of least resistance.
Good luck.
Thank you 1637,like I said I meant no harm,just going for a laugh!no its riffle