Parts Identification And Description (Continued) - Axminster ZX25M User Manual

Parts Identification and Description (Continued)...

W
A X M I N S T E R
W H I T E
Fine feed
assembly
(See Fig 7)
Positive
depth stop
(See Fig 6a)
Quill return
spring cover
(See Fig 6b)
Fig 6
14
The fine feed assembly floats around the splined gear shaft that drives the
quill up and down. When the action of the fine feed mechanism is required;
tightening the 'engaging' knob presses the tapered inside face of the boss of
the tri-lever feed handle into a tapered receiver in the fine feed assembly. This
locks them together. The internal end of the tapered receiver is part of a worm
drive which is connected to the fine feed control handle on the front of the
head. This now allows the quill to be driven down with greater precision.
When the 'engaging' knob is unscrewed a spring loaded plunger in the back
face of the boss breaks the taper lock, and separates the boss and the fine
feed assembly. Behind the boss of the fine feed control wheel handle is a
graduated ring (thimble) so that the movement of the quill can be measured.
The thimble is held to the drive shaft by friction, but can be pre-positioned
and locked in place by a ribbed thumb screw to establish a predetermined
start or stop dimension.
This is a threaded metal rod with a flat machined along it. The lower end of
the rod is screwed into a shaped cast bracket that is fitted around the end of
the quill sleeve; the rod is then fed through a lug cast on the lower edge of
the main casting, a nut is threaded onto the rod on either side of the lug,
which, when adjusted can provide a positive stop on both the 'plunge' and
return stroke of the quill, if so required. A graduated scale is fastened to the
machined flat of the rod to enable the 'plunge' depth to be read off. This
assembly is mounted on the front of the headstock casting in the case of
the ZX30M.
A chrome cover that covers the quill return spring
Fig 6a