JET Tools 690617 User Manual - Page 17
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9.17 Draw bar operation - changing tooling 1. Using the provided wrench, loosen draw bar two or three turns (turn counterclockwise) using draw bar hex (Figure 14). 10.0 Adjustments 10.1 Mill head - left/right adjustment Make sure machine base is secured to floor before repositioning mill head. The center of gravity can shift enough to cause machine to tip over, resulting in serious injury to operator and damage to machine. 1. Loosen four large hex nuts that secure the mill head to the ram adapter (refer to Figure 16). 1/4 turn should be sufficient to allow head to move. NOTE: For angles greater than 10 degrees, use your free hand to support the mill head, taking some weight off the brass worm gears. Doing so will greatly lengthen the life of the worm gears. Figure 14 2. Tap the top of draw bar with a soft-faced hammer to loosen collet from taper. 3. Remove tool from collet. 4. Insert new tool into collet. 5. Tighten draw bar firmly using provided wrench. Turn draw bar. The tool is now ready for use. 9.18 Clamping workpiece to table The worktable has 5/8-inch T-slots for clamping workpiece to table. 1. Set motor switch to STOP position. 2. Place workpiece on table. 3. Clamp workpiece using T-slot clamps, studs, and step blocks as required (Figure 15). Figure 15 Figure 16 2. Turn worm nut (B, Figure 18) to tilt head left or right as required. Use scale on ram adapter to set desired angle. 3. Note: The scales on the ram adapter and for head rotation are guides only. Close tolerance work will require use of a dial indicator to make sure head is 90° to table in X and Y axis. Please note the table is fitted to be slightly higher in front, usually about 0.0005". Be sure to apply torque in two steps using a crossing pattern. Failure to do so could distort the face of the ram adapter. 4. Tighten the four hex nuts. Tighten in two steps using a calibrated torque wrench. Use a crossing pattern to tighten the nuts. Tighten initially to 25 foot-pounds. 5. Before applying final torque, check to make sure mill head is perpendicular to work table. 6. Set up a dial indicator in a collet and secure using the draw bar (refer to Figure 18). 7. Put spindle drive in neutral. 17