Laps and belts
A couple of short points for you this month -
1. I was grinding a thin piece of stone recently and applied it to a previously-used sheet of 600 grit Wet & Dry (W&D) on my lap. The stone was whipped out of my fingers and bounced harmlessly off the back of the splash box, happily.
The next time I tried it gave me the same result.
I stopped the lap and checked the W&D and found it to be more worn than I had thought. Being flat, the stone was being dragged out of my fingers by osmotic attraction between W&D and stone.
By replacing the W&D I finally got to grind it down.
2. A few days later there was a lot of squealing when I started the motor. I added my usual wax to the inside of the belt with no reduction in squeal, so I checked the belt tension and found it to be a bit loose.
The tension needs to be “just right”: too tight and you eventually wreck the motor bearings/bushes; too loose and you get excessive belt wear because of the slipping/squealing.
The moral of the stories is: you need to keep on top of these matters with your equipment.
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On this page I intend to add monthly updates on aspects of jade carving. I also plan to invite more experienced carvers to offer a "master-class" on a particular subject of their choice. With this I hope to enthuse both the novice and the expert in this ancient and beautiful art-form/craft. And comments are welcome!