Page 151 - Turner 1st sem Practicals

Raise the end of the handle carefully to bring the discs in
contact with the grinding wheel. (Fig 5)

Reset the work-rest to obtain further movement of the
dresser for dressing a badly out-of-round wheel.
When the wheel has been dressed, lower the handle to
clear the dresser from the wheel face. (Fig 8)
Counteract the movement of the sudden rise
of the dresser handle because of the
downward thrust of the wheel.

Move the dresser steadily across the face of the wheel.
(Fig 6)

Switch off the machine and remove the dresser from the
work-rest.

Switch off the power at the isolator switch.
Clean the machine after it has completely
stopped.
Reset the work-rest as close to the wheel face as possible,
and tighten the work-rest clamp for grinding the tool.
(Fig 8a)
Apply enough pressure to cause the wheel to drive the
discs positively.

Sparks indicate that the wheel is grinding away
the discs. More pressure against the wheel is
required now. (Fig 7)
Relieve the pressure as you approach the edges of the
wheel.

Retain atleast 1/2 length width of the discs on
the wheel face at each pass to obtain a flat
wheel face.
Dress the wheel face sufficient enough to remove the loaded
or glazed surface or to produce a true face.

138 Producltion & Manufacturing : Turner - Exercise 1.3.42