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XYZ Machine Tools Ltd
XYZ Bed Mill Safety, Installation, Maintenance, Service & Parts List Manual
7.
Do a series of sweeps from 3 o’clock to 9 o’clock and check for the repeatability of the setup.
The head should be trammed with a 0.025 mm.
8.
If the head is out of tram from side to side then loosen the 4 head bolts and rotate the head
with the worm shaft.
9.
Once the head has been trammed tighten the 4 heads bolts. Be careful not to move the head
while tightening. Tighten the bolts in a criss-cross pattern.
Figure 44 - Tramming the Head
Back to Front Adjustment
Note: The head of the SMX bed mills machine is adjusted at the factory. This procedure should
only be needed for a head replacement. It is placed in this section for continuity with the
tramming discussion.
With the dial indicator sweep the table from 6 o’clock to 12 o’clock. The head should be trammed
within 0.0000 to 0.013 mm from front to back. (Note: the head must droop down rather than up
because tool pressure will take care of the extra 0.013 mm)
Note: Minor adjustments can be made with the back head gibs. Tightening the gibs will tend to
tilt the head up from the table. Loosening the gibs tends to allow the head to droop down toward
the table. Over tightening or loosening can lead to other problems with the machine. Typical
adjustments with the gibs is 0.013 mm or less.
5.2.4
Limit Switches
5.2.4.1
X-Axis Limit Switch-Stop Installation and Adjustment
The limit switch-stops for the X-axis are mounted to the front side of the table. The limit switch-stop
consists of a cam bracket, which is fastened to the T-slot on the front side of the table. Each limit
switch-stop must be set to a specific distance from the end of the table in order to maximize travel
and simultaneously prevent serious damage to the machine in the event of a crash. All limit switches
are set at the factory for maximum travel.
Procedure for Setting X Limit Switch
1.
Loosen the X-axis cam bracket on each side of the table.
2.
Slide each cam bracket within the T-slot to the end of the table.
3.
Slowly move the table to one side by hand until the end of the travel is reached.
4.
In DRO mode set X = 0 ABS.