How To Set up Marmo CNC Edge Profiling Tools

Step 1- Unpack the Tools

1. Check the wheels: For Line40 or Line60 tools, look for an engraving on each position and put them in order
2. For Line10 or Line 20 tools, determine the wheels from the colours variants
3. Ensure that you have the Technical Data Sheets supplied in the box of the tools

Step 2 - Input Wheel Diameter Values

1. Find the wheel diameter information that is on a small sticker on the tools (each tool is different)
2. Input this value into the remote machine on the CNC

Do not use laser measuring systems on the machine. These can be inaccurate and will effect the performance of the set. Marmo’s values have been accurately measured.

Step 3 - Attach the Tools to Cones

1. The tools can now be prepared and inserted onto your cones. Ø60mm use 35mm bore, Line 20 is 1/2” GAS
2. For line 60, make sure that the engraving in on the bottom, with the toucher ring segment on the top
3. If the cones have a Ø22.2mm bore, EHS Bore adaptors are available
4. Do not insert in CNC Machine yet

If the cones have a Ø22.2mm bore, EHS Bore adaptors are available. Do not insert into the tool holders on the CNC Machine yet.

Step 4 - Determine the L Value

There is no L value placed in the technical data sheet, this is due to some adjustments the operator can make for the best results.

1. Using callipers, measure the length of Pos 3 profile wheel. For now we can use this value for all wheels
2. Cones can now be inserted into the tool holders on the CNC Machine
3. Take care to place the correct Wheel Positions in the correct holders

Step 5 - Adjust the L Value

1. Launch POS 3 wheel, and bring it next to the slab
2. We can now adjust the L value manually to make sure it is correct
3. Using a knife/ruler, align the blade edge with the top of the slab next to the profile wheel
4. you will see where the wheel will start to grind depending on where the knife touches
5. From here we can adjust the height of the tools by adjusting the L value, if it is too high, increase the L value. If it is too low, decrease the L value. Depending on the margin you need to adjust the height, we can alter by 12mm
6. Once it has been adjusted, relaunch POS 3 and repeat the manual adjusting until you are happy with the height

All Marmo tools are calibrated in their factory, so we can input the same L value determined for Pos 3 across all the wheels. This will always remain the same, even should wheels be replaced.

Step 6 - Input the Working Parameters

With the Geometric data completed, we can now input the working data in the main console. These parameters will never change for the set.

1. Input the RPM values found on Technical Data Sheet
2. Input the Feedrate found on the Technical Data Sheet

Step 7 - Input Stock Removal

Lastly we need to determine the stock removal. Marmo recommend that across the set, no more the 1mm should be removed. This will help preserve the lifetime of your tooling. If you need to remove additional stock, we recommend accounting the difference with your routers.

1. Insert this table with Max parameters:

Machines with Dynamic Compensation for polishers should have setting switched off. This will unnecessarily account for wear, applying more pressure leading to tool destruction.

Step 8 - Prepare the Test

With all the parameters now set, test fabrication can now begin.

1. To begin with, run the stock removal with your routers
2. With all the wheels, run the Feedrate at 50% for the first linear meter. This will allows the diamonds in the tool to be drawn out. The Feedrate should be increased gradually to 100%

Step 9 - Testing

For each wheel position, conduct the following test:

1. Launch the profile wheel, and stop it just before it begins to grind
2. Using a permanent marker, draw several lines across the width of the slab. This will allow you to make sure that the wheels are touching
3. Run the wheel
4. Listen to the sound of the profile wheel, taking care to slow down if the sound pitch is high
5. Once the wheel had completed is run, stop the process again and examine the slab
6. Use an air gun to remove the excess water and make sure the marks have been removed
7. If successfully removed, proceed to next wheel
8. If the lines remain, manually decrease the wheel diameter by 0.05mm to increase the amount of pressure applied and re-run the test

Step 10 - Test Evaluation

1. After all wheels have completed their tests and you are happy with each performance, remove the slab for final inspection
2. Lifting the slab onto its side and using natural light, look down the edge. This will give you the best indication of the quality of the polish and the degree of lines
3. If you are happy with the results, then congratulations, you now have a CNC set that has a lower cost, higher federate and producing highly polished edges
4. If you need to adjust the tooling then please see our Troubleshooting Article