CHECKS AND ADJUSTMENTS
The following adjustments should be checked periodically to ensure trouble free
operations:—
1 / Belt Tension
The motor and drive belts should be checked regularly for correct tensioning. The
belt tension is correctly set when a light finger pressure midway between the
pulleys will give a deflection of 10 -13 mm. The drive belt tension is adjusted by the
knob at the rear of the drive unit. The motor belt tension is adjusted by slackening
the motor base strap and re-clamping in the correct position.
2/ Back Gear Tensioning Screw
This screw is located in the front arm of the headstock above the back gear
eccentric. It should be set so that there is sufficient resistance to the movement of
the back gear lever to prevent its moving out of mesh when in use. A 5/32 A/F
hexagon key is required for this operation.
3/ Rear Saddle Keep Plate
Two hexagon head screws with spring washers attach this keep plate to the rear of
the saddle. The correct setting for this keep plate is obtained by tightening both
screws and then backing each off by half a turn.
4/ Front Saddle Lock Screw
This should be finger tight for normal use and only tightened when the saddle is to
be locked.
5/ Tailstock Clamp Bolt
This should be set to give a clamping position with the handle at about 60° from the
horizontal. To adjust, remove the tailstock from the bed and reset the position of the
bolt in the clamp nut.
6/ Cross Slide and Compound Rest Gibs
The gibs are adjusted using the gib spanner {Drawing M6 — Appendix B) and screw
driver. With the screw driver in the gib screw, slacken the lock nut, adjust the gib
screw and re-tighten each locknut in turn. When properly set, the slide should move
smoothly with no slack.
7/ Fastening Screws
To prevent problems arising from screws and components working loose, regular
tightening of the following screws should be made every 3 months:—
a/
b/
c/
d/
e/
f/
g/
Motor Pulley Screw —
Countershaft Drive Pulley Screw —
Countershaft Cone Pulley Screw —
Gearbox Retaining Screws —
Leadscrew Bearing Bracket Screws —
Rack Retaining Screws —
Saddle to Apron Screws —
using 5/32 A/F Hexagon Key
using 5/32 A/F Hexagon Key
using 5/32 A/F Hexagon Key
using 7/32 A/F Hexagon Key
using 7/32 A/F Hexagon Key
using 3/32 A/F Hexagon Key
using 5/16 A/F Hexagon Key
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