MiTek Saw 2 Blade Change

Health and Safety

• Always verify that power to the machine has been turned off and follow approved lockout/tagout procedures

• Wear the appropriate PPE ( Gloves can prevent cuttings)

• Mounting surfaces and hardware must be clean and dry when installing saw blade. Dust, dirt, and lubrication may cause the blade to come loose, causing injury or death.

Saw Blade Change

• 1. Gather the following supplies: • Socket Wrench • Torque wrench with capacity up to 220 in-lbs • T40 Torx™ bit compatible with wrench

• 2. Use the machine software to position the saw head to prepare for saw blade removal: a) Rotate the angle of the saw blade so it is in a horizontal position (flat surface on top). b) Adjust the elevation and stroke to a comfortable position for removing the blade.

• 3. Activate an E-stop on the machine.

• 4. Press the Request to Unlock button next to the saw chamber door and open the door.

• 5. Turn the disconnect switch handle on the main electrical enclosure to the OFF position and lockout/tagout the machine

• 6. Use a socket wrench and T40 bit to loosen and remove the 5 bolts securing the saw blade (shown in red in the image ). Discard the bolts.

• 7. Remove the saw blade and follow the below instructions to determine whether it should be discard or kept for resharpening: a) Measure the diameter of the blade from outside edge of tooth to outside edge of tooth. If the diameter is less than 16-5/8", discard it. b) If the diameter is greater than 16-5/8", place the saw blade in a safe location for sharpening.

• 8. Prepare the surfaces: a) Blow off dust from the hub and the bolt threads. Remove all pitch and debris from threads. b) Wipe down the mounting surface on the new saw blade and the hub. Use a 320-grit emery cloth, if necessary, to remove pitch. c) Ensure all parts are clean, dry, and free of lubricants. d) If using a used saw blade, measure its diameter from outside edge of tooth to outside edge of tooth. If the diameter is less than 16-5/8", discard it.

• 9. Place the supplied new or sharpened saw blade so the holes align with the holes in the hub and the teeth hook points downward when cutting a straight cut. See Figure 7-26 for the correct orientation.

• 10. Using new bolts supplied in this kit, install all 5 bolts. • Use the torque wrench and T40 bit and bolts referenced in Step 1. • Do NOT use thread adhesive. • Hand tighten all 5 bolts in the order shown in the image • Using a torque wrench, tighten the bolts in the order shown in the image until they all reach the recommended torque shown in the image • Once properly torqued, all bolts should sit flush with the surface of the blade. If the bolts are protruding or skewed, repeat step 10 with new bolts.

• 11. By hand, carefully rotate the blade to observe its motion. It should not have any significant wobble or vibration when rotating.

• 12. Close the saw chamber door.

• 13. Power on machine: a) Remove lockout/tagout and switch the disconnect switch to the ON position. b) Release E-stop and press Reset switch on the HMI.

• 14. Use the machine software to start the saw blade rotation and observe its motion. It should not have any wobble or vibration when rotating.

• 15. Calibrate the stroke and LASM axes ( refers to the attached links)