Tormach PCNC 440 - 4.4.2 Changing Spindle Speed Range

Chapter 4
39
UM10372_PCNC440_Manual_0221A
OPERATiON
To specify spindle RPMs, click the DRO. Using the keyboard, type the desired RPM and press Enter.
• Click FWD to run the spindle clockwise
• Click Stop to stop the spindle
4.4.2 Changing Spindle Speed Range
The PCNC 440 mill has two speed ranges:
Low High
300-4500 650-10,000
The range change is performed by moving the spindle belt from the top pair of pulleys (high speed
range) to the lower pair of pulleys (low speed range). To change belt posion:
WARNING! Electrical Shock Hazard: Be sure to power o
machine before making any electrical modicaons. Failure to
do so could result in death and/or serious injury.
1. Power o mill according to Power O/On
Procedure detailed in chapter 3, Installaon.
2. Open spindle door; unlock motor mounng plate
using a hex key and pull motor forward. The belt
will slacken and can be moved from one pulley to
another (see Figure 4.7).
3. Re-ghten the belt so that there is approximately
1/8”-1/4” of belt deecon midway between the
pulleys with a rm nger press.
Figure 4.7