16
Versitron Operation Manual
4.5
Installing the Test Head
All Test Heads are installed into the test stands in the same manner. They are
designed for quick installation and removal. This feature facilitates scale changeover
from regular to superficial Rockwell and facilitates service.
Make sure the area where the Test Head sits is clean. Lower the elevating screw.
Remove the clamping shield. Remove side guards (motorized units). Loosen the head
lock Allen screw.
Rotate the pressure knobs so that one is in line with the load plate. On all units there is
a preload switch case next to one pressure knob. In this case, keep the case toward the
front.
With the load plate facing the same direction as the stand, carefully set the Test Head
into the stand with the indenter assembly over the indenter hole. Set the indenter
assembly into the indenter hole area and lean the Test Head upright while settling the
head into position. Be sure not to damage the indenter by making contact with the
stand.
Lift the pressure yoke and rotate the pressure knobs so the pressure yoke rests on
each knob. (If a motor drive is installed, it may be necessary to push down on the top
of the test head while rotating the pressure knobs in order to get enough clearance to
be able to rotate the knobs.) Orient the load plate to face frontward while holding the
knobs into position. On manually operated units, pull the operating lever down to the
stop position and tighten the head lock Allen screw while holding the lever down. On
automatic units, press the top of the Test Head down by hand until it bottoms out, then
tighten the head lock Allen screw. (To remove the Test Head the procedure is
reversed.) The entire procedure should take a few seconds, once it has been
repeated a few times.
Installing the Test Head
Pressure knob
Preload Switch
Head Lock
allen screw