jamesp
Cave Dweller
Member since October 2012
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Post by jamesp on Mar 9, 2018 11:41:17 GMT -5
So will a hard plate polish ? Like 2000 or 3000 grit ? This range tends to put a fair shine down. I am looking to polish the flat backs and figured the hard plates may do that well. Guessing the pads work best for the curved dome side ? Kingsley sell 8 inch pads ? The pads saturated with cerium oxide will polish real good. Glass worker's polish of choice on pads is cerium oxide. I suppose cerium is what you use on you large auto lappers. Thanks, been anxious to try that polish.
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NRG
fully equipped rock polisher
Member since February 2018
Posts: 1,656
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Post by NRG on Mar 9, 2018 13:02:03 GMT -5
The polishing lap at class is covered in wool carpeting that is saturated with Tin Oxide. Makes glassy polishes. Prepolish is up to 3000 on belts.
ETA this is informational, not judgemental on other methods.
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jamesp
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Post by jamesp on Mar 9, 2018 20:05:10 GMT -5
The polishing lap at class is covered in wool carpeting that is saturated with Tin Oxide. Makes glassy polishes. Prepolish is up to 3000 on belts. ETA this is informational, not judgemental on other methods. Maybe you can find out where they got the carpeting from ? Ready for legs. Had a short v-belt so I built it to fit the v-belt. That is an odd approach. It is compact and welding was bit of a challenge to weld in good alignment, curved surfaces did not help. It's well aligned after a few alterations. Rat's nest cables, took longer to untangle than to build.
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jamesp
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Post by jamesp on Mar 10, 2018 5:04:35 GMT -5
Drummond Island RocksThis was a challenge to weld. Too compressed and too many curved surfaces to weld to. When the motor mount plate was welded on it changed from being parallel to the drive shaft after cooling and I did not check it. Then I welded braces to it only to find the motor shaft and the drive shaft were way off parallel. Unwelding is no fun but that was the route required. It is set up 2:1 reduction so ~850 RPM however the motor pulley is adjustable to smaller making 3:1 @ ~575 RPM possible. Seems like a nice speed range. These motor pulleys are superb for lapidary machines, I'll post a detail on it. Anyway, task for today is final assembly and welding a tripod stand. Safety guard. Drip tank. Drain fitting adaptor for garden hose. Any needed apron/lip for water management. Two of the legs will have wheels so it can be carted around. Maybe a removable pull behind wagon handle attachment. I will use it first before cutting leg length down to optimum comfort/operating height. I have the following abrasive plates coming in soon I hope, 60-100-280-600-1200-2000. Must find felt/carpet/wool pads for polishes. The glass worker's lap has a tire surrounding his 24 inch home made lap. Makes for a comfortable arm rest. They grind whole vase bases and blown lamp shades where the metal hangers connect at the top. They usually use 12 inch plates instead of the 24 inch plates for ease of changing plates. Some of their vases have a dead wet polish on the base. I'll find out how the do polish. pad or plate They call the machine area the cold working area. adjustable motor sheave, highly rated
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NRG
fully equipped rock polisher
Member since February 2018
Posts: 1,656
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Post by NRG on Mar 11, 2018 15:21:21 GMT -5
Carpet is remnants they got from an installer. One piece lasts a decade
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