ADJUSTMENTS & OPERATION
FIGURE 18
Longitudinal Auto-Power Feed
To obtain a desired feed rate, the correct gear configuration must be set
as shown in “Feed Rate” chart Fig.6. The longitudinal auto-feed lever
(A) Fig.18 is used to engage the half-nuts for longitudinal feeding of the
carriage. This lever has 2 positions; the lower position engages the
half-nuts to start longitudinal feed and the upper position disengages
the half-nuts to stop longitudinal feed.
For imperial threading operations, the auto-power feed can be engaged
and disengaged at any time. To reverse the logitudinal feed, disengage
the halft-nuts (stops longitudinal feed) and manually move the carriage
back using the carriage handwheel. The auto-power feed can then be
engaged again for a second pass.
Note: The only difference in metric threading is the half-nuts must be
engaged during the entire threading operation. The thread dial can not
be used for metric threading operations.
Thread Cutting Operation
In order to obtain the desired thread, all change gears must be installed
in accordance to the thread charts. Failure to do so will give incorrect
threads.
When cutting inch threads, the auto-power feed and thread cutting dial
(B) Fig.18 are used. The threading dial Indicator chart Fig.7 specifies at
which point a thread can be engaged using the threading dial.
When cutting metric threads, the auto-power feed is used. Note: The
half-nuts must be engaged during the entire threading operation. The
thread dial can not be used for metric threading operations.
Thread Cutting Dial Operation
The thread cutting dial (B) Fig.18 is used to engage the half nuts with
the leadscrew in the same thread that has been previously cut. The
threading dial Indicator chart Fig.7 specifies at which point a thread can
be engaged using the threading dial.
Changing spindle speed
In order to obtain the desired spindle speed, the belt configuration on
the pulleys must be set as shown in spindle speed chart Fig. 3. The
letters correspond to the required pulleys and the numbers correspond
to the required pulley step. Pulley A Fig.3 is the motor pulley and
pulley C Fig.3 is the spindle pulley. To obtain a spindle speed of 150
RPM, set the belt on step 1 of pulleys B & C Fig.3.
Tensionning Belt
A tensionner (A) Fig.19 is supplied to tension the belt. Once the belt is
in position, lower the tensionner against the belt and apply necessary
tension. Lock tensioner in place using open end key supplied to lock
hex. nut behind support plate (B). Make sure the tensionner does not
come in contact with any other part of the pulley or belt before locking
it into place.
FIGURE 19
