3 Operation and Maintenance Manual
MQ-150 Ballscrew Feed Unit
Introduction
The Zagar MQ-150 unit is a ball screw actuated, quill feed machining unit. It is
ideally suited for single or multiple spindle applications on all types of metal removal
machinery. The unique arrangement of few moving parts in a compact assembly
provides for versatility of application and minimal maintenance in operation. The
excellent quill bearing area, combined with the ball screw centerline thrust design,
provide for extreme stability throughout the unit stroke. Your unit is configured at
the factory with a specific spindle nose chosen at the time of order, a specific pulley
ratio depending on your torque and output rpm needs and any additional options.
These will be discussed in detail further in this manual.
An AC, brushless servo motor drives the ball screw (feed) axis and allows for infinite
variability in feed rate up to the maximum speed. Use of this servo motor allows for
elimination of mechanical speed reducers and clutches which are inherently
maintenance items. The spindle axis may consist of a standard, fixed speed AC
induction motor, an inverter drive for variable speed or an AC brushless servo motor
for tapping and two axis synchronized motion. Zagar Incorporated offers full servo
control packages complete with programming and an easy to use operator interface.
Many tool setups can be permanently stored in these controls.
The standard program functions include pulley ratio entry, unit home, array
initialization, offset entry, position display, jog and tool setup. Tool setup options for
the single axis drives include (fixed speed and inverter) include drill, peck drill, multi-
stage drill, skip drill, counterbore, countersink, spotface, ream, drill-ream. The two
axis servo control offers that additional tool options of tap and drill-tap. The standard
sensing switch assembly features commercial water tight proximity sensors.
Mounting position is not critical as the unit is grease lubricated. It can be mounted in
any orientation.
When using this unit with a multiple spindle head, the head should be supported on
guide bars and if used in vertical position the head must be counterweighted or used
in conjunction with a brake on the servo feed motor.
