| Countermeasure
(Setting of drill point) |
| 1. Adjust pointing wheel |
| |
Gap |
| |
Move the secondary wheel back. (or bring the primary wheel
forward.) |
| |
Overlap |
| |
Bring the secondary wheel forward. (or move the primary wheel
back.) |
| |
| 2. Tighten fixture screws |
| |
-. Mortar housing micrometer screws
-. Universal attachment fixture screws
-. Table micrometer fixture screws |
| |
| 3. Use suitable drill well for drill specification
and diameter. |
| |
List of drill well |
| |
V-type |
| |
U-Type |
| |
| 4. Adjust the amount of drill protrusion from
drill well. |
| |
Ideal amount extending from the drill well
is usually very small, however when re-pointing UC type drills,
make sure that the entire head protrudes from the drill well.
(As it the margin part maybe chipped, avoid using this part
to rest the drill in the drill well.) |
| |
|
| |
| 5. Adjust the universal
joint (Correcting runout) |
| |
|
