| 摘要 |
In a wobbling device of a sand belt grinder of the invention, a set of electromagnetic movable members is disposed outside a sand belt shaft base, and micro switches are disposed under two sides of the sand belt shaft base so that the control of continuously powering on and off is generated and the electromagnetic movable members generate continuously attracting and releasing operations. In addition, the movable members drive the shaft base and a sand belt to generate reciprocated wobbling operations at specific angles. Thus, when the sand belt is grinding, the sand belt generates the leftward and rightward sliding movement in a larger area so that the excellent polishing effect and the economic effectiveness can be obtained.
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