Setting the Power
Feed Rate
The carriage has longitudinal and cross slide power feed capabilities. All directions reverse when spindle rotation is reversed.
NOTICE
Feed rate is based on spindle RPM. Pay close attention to the feed rate you have chosen and be ready to disengage the apron. Failure to do this may cause the carriage to crash into the chuck.
To set and engage the power feed:
1.DISCONNECT THE LATHE/MILL FROM POWER!
2.Refer to the Change Gear Chart on Page 31 to determine the needed combination of gears and which spindle location to install each gear on. See Figure 33 for the gear installation locations that are referenced by the chart.
M
NA
|
| C |
Lash | B | D |
Adjuster |
| |
|
| |
and |
|
|
Lock |
|
|
Nut |
|
|
Figure 33. Change gear locations.
3.See Figure 34 for an example of gear com- binations that give the longitudinal and cross slide rates. For example: The chart shows that 0.0089" of longitudinal travel per revolu- tion of lead screw is needed, or 0.0019" of cross travel per revolution of lead screw is needed.
Note: All change gears are stamped with the number of teeth they have.
G0492 12" X 36" Combo Lathe/Mill
4.Loosen the lash adjuster (Figure 33) and swing the assembly out of the way.
5.Remove the required
6.Move the lash adjuster so the gear backlash is at 0.003" to 0.008", and tighten the lock nut.
7.Use the leadscrew lever to select leadscrew rotation direction (Figure 35).
8.Loosen the apron lock bolt, and use the feed lever (Figure 35) to engage the cross slide or longitudinal feed.
Inch | Longitudinal Cross | |
Threading | Feed | Feed |
Figure 34. Using the change gear chart.
Leadscrew Lever |
|
| Apron |
| Lock |
Feed | Bolt |
| |
Lever |
|
Figure 35. Leadscrew and feed levers.
