Starting Sharpening Cycle

Now that your XR28™ has been setup we are ready to start the sharpening cycle.

Sharpening button bits is a repetative process that consists of four stages

1. First sharpening cycle

2. Inspecting cabide button flats

3. Additional sharpening cycle (if necessary)

4. Final inspection

This process is then repeated for each carbide button. 

1. First Sharpening Cycle

It is always a good idea to do final checks before starting the sharpening cycle, remember:

• Confirm size, profile, tilt angle, time is set correctly

• Confirm bit is positioned correctly so that the button you wish to sharpen is in-line with the sharpening tool. Ensure the bit is clamped. 

• Confrim there are no obstacles in work area that could interfere with the machine possibly causing harm

If all of that is correct, use the right joystick to lower the sharpening tool onto the carbide button you wish to sharpen.

It is now time to Start the operation.

The XR28™ comes standard with a two-hand start requirement. This requires you to toggle the left joystick down while pressing the start [1] button. 

NOTE: Operation can be stopped at any time by pressing the STOP [0] button or in an event of an emergency the emergency stop.

Inspecting carbide button after sharpening cycle

After the sharpening cycle is completed we recommend you move the arm out of the way and inspect the button to determine if extra time is required.

When inspecting the sharpened button you are looking at the remaining flat left on the button and the profile.

• under sharpened (more time required)

• correctly sharpened (no more time required)

• over sharpened 

Understanding your button bits

In order to maximise your efficiency and effectiveness, it is important to understand when a button bit is ready for sharpenening.

There are three possibilities:

1. Carbide button not worn enough, less than 25% worn -> leads to premature failure of sharpening cups

2. Carbide button in ideal range, between 25% - 50% worn. -> 35% worn recommended, most efficient for sharpening cup

3. Carbide button too worn or damaged, over 50% worn -> too much strain on machine and cup

How to measure level of wear

As carbide buttons wear, they create a flat section on the body of the button. Measuring this flat section and comparing it to the diameter of the button gives us the indication of wear level.