MINITECH
CNC Mini-Mill User's Guide
Tramming the head
Tramming the head means to make the spindle perpendicular to the table. It is important that
the table already be aligned before you begin this process. There are two directions that the
head must be adjusted.
The tramming process is illustrated below.
1. Mount the dial test indicator in the spindle. (if you like you can put your parallel bar on the
table and indicate off of it)
2. Orient your test indicator as shown in figure 12 and zero it.
3. Rotate the spindle in a half circle motion from left to right and check the indicator.
4. Adjust the spindle in a clockwise or counter-clockwise direction until the head is
perpendicular, this is shown in figure 13.
5. The indicator needle should give the same reading at each end of the half circle. To adjust
the spindle you will need to partially loosen the screws shown in figure 14.
© 2012 Minitech Machinery Corp. 22
Figure 11: Screw tightening pattern.
