Hello all, I'm running a mini piglet and I've watched all of Docs videos but still having trouble tuning it in. The area that I'm working has both coarse and fine gold, but I'm getting a lot of build up in my matts. I'm sure that I'm not feeding my highbanker to fast but assume that maybe the depth of my water flow might be to shallow. I think i might have to lift the flap up higher and increase water to my header box to maintain the deadening pool Behind the flap.I have also ordered the extension for the piglet in hopes of catching more fine gold but assume until I properly tune the upper portion of my sluice This will not help much. When I clean out, I always have coarse gold in the back throughout the miners moss in the deadening pool and barely anything in the rest of my sluice,this is strange because when I test pan I'm always finding fine gold that is not showing up in the matts. I believe I'm getting to much build up and gold is riding right over the rest of the runs. Even if I do not feed the highbanker the material does not seem to move out. HELP!!!
what angle are you running? what mats are in the piglet? the lower sluice can be set at a flatter slope and so even if the upper is not tuned it should not totally mess up the lower sluice. the volume of water if you are running it fast enough should carry off the lights and leave the gold. is the build up light material or is it heavy black sand. If the latter I would say clean out more often. if it is ligfht weight sand then you need more energy.
You'd need to state your gallons per hour of water running through the Piglet as well as pitch or angle of the unit. Once you provide that folks will be able to help you a bit more. That link above is a great chart to help figure out gph.
Are you running a 12v pump?
Your pump and angle sound right. As long as the riffles are active and you see the material moving within them then they are engaging. The characteristics of your fine gold in relation to proportional force are going to move them further down your system. By adding that extension I believe you will greatly improve your recovery. Without the extension you'd need to back off your feed rate. Shallow water will scour the mats more. When you add the extension you will have a shallower angle on the lower section. That coupled with the length of the two will give you deeper water over less aggressive mats.
This is where a 30 second phone video would REALLY help.... all I need to see is the sluice running with water through it. Also, it would help to have a CLEAR picture of the mats at shut down. Often we can tell what's going on with the exchange.
Point #1 on tuning...
You should see SOME fine black sand in ALL you mats. If you're blowing out ALL the fine black sands... then fine gold is probably going as well. Not LOADED up... but a small amount.
If you have a lot of fine gold in your area then the extension is recommended. You only have a 36" x 8" sluice and some of that is the flood chamber... and some of that is more aggressive matting. Having the extension to focus only on the fines will REALLY help.