Premier Wonder Grinder Help
Posted in:
Tech Help, Tips, Tricks, Techniques
I have an update. Whatever I did, I may have just changed my process and resolved the issue.
I changed too much to say that any one thing was the problem, so I wont venture to guess.
This time, I heated the stones, disassembled in the oven until they were reading 130F/54C
After assembly I added all of the ingredients very slowly. 77oz of cocoa nibs (i dont pregrind) took 2.5 hours. I'd add a little and let it go until they were liquid, then add more, etc. I also added the sugar after 12 hours and again, it took about 45 mins to add the 23oz of sugar to total a 100oz batch.
Chocolate did get into the axle, but I'm seeing zero grit or granite dust. The wheels never seized, and the batch came out perfectly. Surprisingly, I didnt even make it to the 24 hour mark in refining before it was done.
Something else I changed, I pulled the batch as soon as it was done. I'm used to the santha, where if it's done at an inopportune time, I can release the tension on the wheel assembly and let it run indefinately (i've let the santha run for 2 weeks one time with no ill effects on the chocolate batch)
So, if anyone else is seeing the issue, I might suggest adding your ingredients more slowly and be sure to preheat the drum/stones. I'm also timing the time I put my batches in so that I can plan around pulling the batch and tempering/molding them up.
My thinking here is that the batch is finishing and getting fine particles sooner than I was expecting, and letting it run longer essentially had the effect of having granite run against granite, creating some of the dust. I'm also thinking that adding just too much of the coarse dry ingredients also didnt help any at the dust creation. Having too many of the dry ingredients too quickly also allowed the coarser particles into the axle shaft which allowed wearing down the axle, potentially grinding on the stone inside the gap.
By all means, if my thinking is flawed; let me know. I've been known to be wrong once or twice 
Note: I also put both machines through the dry sugar run, scrubbed them down completely and such in the process. So I think it's the combo of the bed-in process in addition to precautionary steps that combined to bring out a perfect batch. 77% 2 ingredient chocolate came out exactly as expected. I'm going to test on a milk chocolate batch before I try another white chocolate batch.
Thank you to everyone that gave input/suggestions here. It was greatly appreciated!