3.1 OPERATION
Read the following sections to understand how to operate the 4th
Axis:
l
"About the Center Hole" (below)
l
"Align the Angle of the Tilt Position" (below)
l
"Distribute Wear on the Rotary Table" (below)
l
"Lock the Tilt Position" (below)
l
"Set a Reference Location" (below)
l
"Tighten the Rotary Clamps" (on the next page)
l
"Turn the Rotary Table by Hand" (on the next page)
3.1.1 About the Center Hole
The center hole is ground to an MT taper, or a through bore, to fit
workholding. On rotary tables with an MT taper, there is also a
shallow, concentric pilot hole, used to locate a chuck or other
tooling.
Figure 3-1: Center hole.
Make sure that coolant does not enter the moving rotary table
components. If it does, go to "Examine the 4th Axis for Coolant
3.1.2 Align the Angle of the Tilt Position
Use the vernier scale to align the angle of the 6-in. Tilting
Rotary Table or 8-in. Tilting Rotary Table when moving from
horizontal to vertical.
Figure 3-2: Vernier scale.
Note:
It's easier to setup chucks or fixtures while the
rotary table is in the horizontal position, and then
move the rotary table to the vertical position.
3.1.3 Distribute Wear on the Rotary Table
We recommend distributing wear over the whole of the worm gear.
Do the following:
l
When doing long runs of constant back-and-forth movement,
occasionally reposition the table top and workholding fixture.
l
If the moves are close to 180°, continue rotating in the same
direction to the start point, rather than returning in the
opposite direction.
l
Program the start point to change a few degrees each time (if
the part permits).
3.1.4 Lock the Tilt Position
You must lock the tilt position on the 6-in. Tilting Rotary Table or 8-
in. Tilting Rotary Table before machining. To lock the tilt position:
1. Set the desired tilt of the rotary table.
2. Tighten the two tilt clamps.
The tilt position is locked in place.
3.1.5 Set a Reference Location
To read angles directly off the table:
Loosen the clamp holding the adjustable reference mark in
place, and then move the pointer to an exact degree mark.
Page 6
©Tormach® 2019
Specifications subject to change without notice.
tormach.com
TD10552: Owner's Guide: 4th Axis (0919A)
TECHNICAL DOCUMENT
