The Jog Knob; Step-By-Step Lathe Powerfeeding - Smithy GRANITE 1300 SERIES Operator's Manual

When using the X-Axis powerfeed for a given feed rate,
make sure the the half nut is DISENGAGED.
If the powerfeed lever will not engage, first check the
half-nut lever.
half-nut is engaged (down position). You may also have a
situation where the teeth on the respective gears are not
meshing. Rotate the leadscrew handwheel slightly to allow
the teeth to mesh.

The Jog Knob

The chrome knurled knob located on the upper right side of the gearbox can be used to
manually turn the gear shafts and allow the straight cut gears to mesh easier when
moving the powerfeed selector levers.
Step-By-Step Lathe Power feeding
Step 1: Determine the proper speed and feed rate for the material you are
cutting and the cutter you will be using from a general reference guide such as
the Machinist Ready Reference.
Step 2: With your workpiece and tooling properly mounted, place the power-
feed selection lever in the lathe mode by moving the lever to the lathe chuck
icon all the way to the left.
Step 3: Referencing the chart on the front of the machine's headstock, find the
desired feed rate (or the closest to the listed range for your work material
cutter.) See section 8 for a detailed chart explanation.
Step 4: Position the selector (1-7) into the position listed on the chart for the
desired feed rate.
! NOTICE !
! NOTICE !
The powerfeed will not engage if the
Figure 9.5 Jog Knob
Or Visit www.smithy.com
9:Using Powerfeeding
9-4