For Machines Mfg. Since 8/11 | O P E R A T I O N | Model SB1001 8K™ Lathe |
Changing Feed Direction
The position of the feed direction gears controls the rotation of the longitudinal leadscrew as follows:
ssStandard: Leadscrew rotates in the same direction as the spindle.
ssReverse: Leadscrew rotates in the opposite
direction as the spindle.
ssNeutral: Leadscrew and end pulleys are disengaged from the drive train. This configuration can be used to save wear on the end pulleys and timing belts when tool position is manually controlled.
Tool Needed | Qty |
Wrench 13mm | .......................................................1 |
To change the position of the feed direction gears:
1.DISCONNECT LATHE FROM POWER!
2.Open the end cover and loosen the pivot lock bolt.
Spindle Shaft
Gear
Feed Direction
Gears in Normal
Position
Pivot
Bracket
Pivot Lock Bolt
Figure 69. Feed direction gears in the right-hand threading position (belts and pulleys removed for photo clarity).
3.Standard: To make the leadscrew and spindle rotate in the same direction, turn the spindle clockwise by hand as you apply pressure on the pivot bracket toward the front of the lathe until the rear direction gear meshes with the spindle shaft gear (see Figure 69).
4.Reverse: To make the leadscrew and spindle rotate in opposite directions, turn the spindle counterclockwise by hand as you apply pressure on the pivot bracket toward the back of the lathe until the front direction gear meshes with the spindle shaft (see Figure 70).
Feed Direction
Gears in Reverse
Position
Figure 70. Feed direction gears in the left-hand
threading position.
5.Neutral: To disengage the leadscrew and end pulleys from the drive train:
a.Back out the tensioning thumb screw (see Figure 71) all the way, then push the top end pulley toward the back of the lathe to release the tension on the attached timing belt.
Tensioning Thumb Screw |
Push |
Here |
Direction |
Feed Gears |
Figure 71. Feed direction gears in the neutral position.
b.Turn the spindle counterclockwise by hand and apply pressure on the pivot bracket toward the front of the lathe until the front direction gear is resting on the timing belt (see Figure 71).
6.