65
XYZ Machine Tools Ltd
XYZ Bed Mill Safety, Installation, Maintenance, Service & Parts List Manual
5.1.3
Pendant Replacement
1.
If possible save the machine configuration using service code 142. Shutdown the pendant.
2.
Isolate and lock out power to the machine.
3.
Unplug all the connectors on the pendant arm side of the pendant. Make sure the cable idents
are legible, if not label cables as they are removed.
4.
Remove the switch box front panel to gain access to the pendant mounting screws. Remove the
(4) ¼-20 x ¾” SCHS that secure the pendant in place.
5.
Remove the machine ID key and options key and install into the replacement pendant.
6.
Fit the replacement pendant by reversing the previous operations.
7.
The original pendant must be returned to XYZ for repair or exchange.
8.
When fitting the replacement pendant: ENSURE CABLES ARE INSERTED INTO THE
CORRECT CONNECTOR. Incorrect connections may damage the pendant (not covered by
warranty).
NOTE!
It is wise to back up your flash disk from time to time via a network or USB disk. If your
pendant needs to be replaced you will lose all of your programs (see programming manual).
5.1.4
Cable Routing on Machine
Whenever you replace a cable or reroute a cable it is very important to keep the power cables and logic
cables separated from each other. The power cables consist of the (3) 110-volt motor cables and (2)
110-volt power cables for the pendant. The logic cables are used to carry encoder signals between the
cable breakout box and computer module. Mixing of the power and logic cables may cause noise from
the power cables to interrupt the signals in the logic cables. This can lead to intermittent axis faults or
repeatability problems. See Figures 9 and 11 for a layout of the cable connections.
5.1.5
Power Drawbar
A power drawbar is a standard item on the SMX 2500, 3500, 4000 & 5000 machines. It is bolted to the
top of the head by the use of 3 SHCS. Some machines may require a washer to space the unit up to the
proper height to allow the drawbar to engage properly.
The power drawbar is supplied with air from a regulator/lubricator set. The pressure regulator should be
set at around 65-70psi. Increasing the pressure may shear the drawbar.
Make sure the lubricator is kept filled with oil. Fill the reservoir about 2/3 full using AIR TOOL OIL ONLY.
Failure to do this will not allow oil to lubricate the internal components of the unit and it may wear out
prematurely. It is also important to make sure the lubricator dispensing rate is set properly. There is a
sight glass to the top of the regulator. Whilst using the Drawbar, count the seconds per drop. The unit
needs to be set to one drop every three seconds. This can be adjusted using the adjusting screw on the
lubricator.
5.1.6
Ball Screw Replacement, X-Axis (Table) – 2500 & 3500
CAUTION!
Never screw a ball screw partially or totally out of its nut. They cannot be reassembled.
1.
Position the table in the centre of travel.
2.
Remove the left side table tray by pulling it up, and remove the X motor.
3.
Remove the motor mounting bracket and bearing housing.
4.
Remove the right side bearing housing.
5.
Loosen the table gibs. Slide the table to the right and on to a lift that will support the table's
weight. Slide the table until the yoke is exposed.
CAUTION!
The weight of the table must be supported by the left to prevent damage or breakage to the
dovetails.
