EASY TOOL MONITORING: HOW TO USE THE ‘LOAD MONITOR FUNCTION’

1. WHAT DOES THE LOAD MONITOR FUNCTION DO?

The Load Monitor Function oversees the cutting load on the following:

A. Feed Axes

B. Spindle

C. M-Tool Spindle

Loads are supervised in accordance with specified ranges (hereafter ‘parts’) and axis commands within the part program.

2. WHAT HAPPENS WHEN CUTTING LOADS EXCEED LEVEL LIMITS?

A. Exceeds the preset first limit level, a Level C Alarm (overload alarm) will occur.

B. Exceeds the preset second limit level, a Level A Alarm (tool breakage alarm) will occur.

3. STEPS TO TAKE BEFORE LOAD MONITORING CAN BE DONE…

A. A part program must be created.

When creating the part program, assign ‘part’ numbers and specify the monitored axes for the sections of the program where monitoring is required.

*Note: Up to 64 ‘parts’ can be specified for each of the turrets*

B. Level limits must be set.

Set first and second limit levels for every ‘part’ and axis. You can do this by automatically setting or by adjusting the required values as needed. Monitoring is carried out by comparing these limit levels with the detected cutting load.

4. FORMAT OF SYSTEM VARIABLE – VLMON

VLMON [Part Number] = Monitored Axis Number

Part Number: 1 to 64

Monitored Axis Number:

0 … Load monitoring OFF for all axes

16 … M-tool spindle monitoring ON

1 … X-axis load monitoring ON

32 … W-axis monitoring ON

2 … Z-axis load monitoring ON

64… Sub-spindle monitoring ON

4 … C-axis load monitoring ON

128 … Y-axis monitoring ON

8 … Spindle monitoring ON

256 … B-axis monitoring ON

*Note: To monitor the load on two or more axes simultaneously, specify the sum of the relevant monitored

axis numbers.*

 

Example 1:

To simultaneously monitor the loads on the X and Z axes at turret A, the sub spindle and the W-axis,

specify as follows:

VLMON [ ] = 1 + 2 + 32 + 64 = 99

 

Example 2:

To simultaneously monitor the loads on the X and Z axes at turret B, the M-tool spindle, and the Caxis,

specify as follows:

VLMON [ ] = 1 + 2 + 4 + 16 = 23

5. RAPID FEED IGNORING FUNCTION

Program Example 2:

T010101

N005 M216

N010 VLMON [1] = 2 … Monitoring ON

Cutting Program…

N020 VLMON [1] = 0 … Monitoring OFF

6. HERE IS WHAT YOU WILL SEE…

A. Automatic Setting

First, you will click the button pictured below:

Next, you will see a green image and press the ‘Auto-Set’ button (darker green):

B. Direct Setting of Limits

This step/image is optional if you want to see your data and make any modifications.

C. Load Monitoring

Now, to start the ‘Load Monitoring’ process, you will press:

D. Load Monitoring Graphic Display (Load Trace Display)

Lastly, this is the graphic that will be displayed when the load is being monitored.

Written by: Trey Starnes, Hartwig Application Engineer