Automatic Feed Rate Mechanism for Lapping Jig
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-04
This article describes an automatic feed rate mechanism which is integrated into a commercial lapping-polishing jig. It permits a continuous and controlled lapping and polishing process for improved thickness and flatness control of the specimen. In operation, the lapping jig rests on a lapping disk 1 which rotates about axis a-a, as shown in Fig. 1. The jig is constrained by externally fixed rollers 2 and rotates in a laterally fixed position about axis b-b. Jig rotation is imparted by lapping friction and the difference of peripheral speeds at radially extreme points where the jig and lapping disk interface. The specimen 3 is held on the pad 4 by a vacuum which is applied via a rotary manifold 5 from a fixed external source. Adjustment for the unmodified lapping jig is performed manually. For adjustments, i.e.