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Model G0757Z (Mfd. Since 02/15)
Setting Vertical Spindle Speed
1. Select appropriate speed range using high/
low gear selector (see Figure 34).
"L" represents low speed range, which is
capable of spindle speeds from 100–600
RPM. "H" represents high range, which maxi-
mizes spindle torque and is capable of spin-
dle speeds from 350–2000 RPM.
Setting Horizontal Spindle Speed
Tools Needed Qty
Open-End Wrench 24mm .................................. 1
Dead Blow Hammer .......................................... 1
Hex Wrench 8mm .............................................. 1
To set horizontal spindle speed:
1. DISCONNECT MACHINE FROM POWER!
2. Open column rear cover to gain access to
horizontal spindle V-belts and pulleys, as
shown in Figure 36.
3. Loosen tension thumb wheel and hex nut
behind lower idler pulley bracket.
4. Move lower idler pulley to right to release
V-belt tension.
Note: You may have to bump lower idler pul-
ley with dead blow hammer to get it to move.
Figure 36. Horizontal spindle V-belts and pulleys
(cover removed for photo clarity).
Tension
Thumbwheel
Hex Nut
Behind Bracket
Lower
Idler
Pulley
Figure 35. Controls to adjust spindle speed.
Variable-Speed Dial
Power
Button
Vertical Spindle
Direction Buttons
RPM Readout
Note: It may be necessary to rotate vertical
spindle by hand to enable gears to mesh
properly.
2. Rotate variable-speed dial fully counterclock-
wise (slowest), then press power button
and use vertical spindle direction buttons to
choose direction of spindle travel and start
spindle rotation (see Figure 35).
Figure 34. High/Low gear selector in "L"
position.
3. Watching vertical spindle RPM readout,
rotate variable-speed dial until desired RPM
is reached.