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Please box up the following three items for return
Please use your original CMC box to box up the following four items into one box. If you do not have your original packaging the box the new CMC arrived in can be used. • Board • Gantry • Head • ECU/Driver Pack Please see the following removal instructions for each part.

Head Removal
Caution: Head appearance may vary from model shown, but the connections are the same. Do not pick up head using the blade depth knob or the head cover. Pick up the head by holding the “D-Shaped” upper and lower head plates.	Image Added
If the motors are engaged, click reset motors button on the cut preview and click OK on the release motors prompt.
Press the 0 on the rocker switch on the back of the ECU to turn off the ECU.
Push blade cartridge release down to eject the blade cartridge. Turn off the air.
Remove the two gantry covers by unscrewing the screws that hold them in place and set them aside.
Move the gantry to the right side of the board until the foot block is off of the board.
Disconnect the head power plug (square connection) from the head grabber arm.
Disconnect the air to the head by untwisting the two air fittings.
Remove the two 5/32” screws and set aside.
If present, remove the Head Assembly Power Cable Strain Relief from around the base sides of the Head Power Plug connection.
Roll the head down the gantry until it rolls off the gantry, taking care not to drop it. Replace the two 5/32” screws into the head.

Removing the ECU/Driver Pack
Make sure the rocker switch on the back of the ECU is on the 0 for off.
Unplug the power cord.
Disconnect the male end of the board cable from the back of the ECU by turning the locking ring and pulling gently.
Unplug the USB Cable from the back of the ECU/Driver Pack.

Secure the Gantry: Loosening Drive Belt
Move the gantry to the right side of the board about two feet from the right edge (to leave room for the packaging foam corners).
Remove the 5/32” Allen screws and washers from the lower gantry plate.
Locate the 3/16” Allen belt tensioner screw that’s located on the right bottom side of the lower rail and marked with a red dot.
Loosen this screw one turn only so that there is some movement in the belt tensioner. The tensioner springs should be visible. WARNING: Make sure you do not over-loosen this screw. One full turn is usually sufficient.
Locate the belt tensioner hole on the end of the belt tensioner. Place the 5/32” Allen screw and washer we removed from the lower gantry plate into the belt tensioner hole. Tighten the Allen screw until belt tensioner is flush with the rail and the springs are not visible.
Go back and tighten the 3/16” Allen belt tensioner screw.
Lift the drive belt end out of the belt tensioner slot. Pushing the drive belt end to the right may assist in getting a hold of it.
Wind up the drive belt, and rubber-band it. Repeat steps 4 through 8 with the upper rail.

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Installing the Drive Belt onto the Rail
Lightly pull the coiled drive belt toward the right to take up the slack and pull the belt anchor into place flush with the end of the CMC.
Remove the rubber-band from the drive belt and loosely lay the drive belt along the rail channel.
Pull the loose belt end to the right, making sure that the drive belt is not twisted and that the teeth are facing down toward the board into the rail channel. Slide the screw of the belt end into the belt tensioner slot.
Remove the 5/32” Allen screws and washers from the belt tensioner.
Place the two Allen screw and washer into the holes provided on the lower gantry plate. Place them so that the screw protrudes only slightly from the back of the plate.
Loosen one full turn only the 3/16” Allen belt tensioner screw from the right bottom side of the lower rail marked with a red dot.
The belt tensioner should spring fully into place. WARNING: Make sure you do not over-loosen this screw. One full turn is usually sufficient.
Snugly tighten the Allen belt tensioner screw on the bottom right of upper and lower rails. Repeat these steps through with the upper rail.
Replace the two gantry covers using the two screws removed earlier.