Laser Z-Axis (Up/Down) Binding

Problem:

In some of the earliest released Emblaser 2 machines (March-April 2017), the laser head's up/down movement binds and does not allow the correct laser height to be set.

This is caused as a result of the new plastic parts having very tight clearance and in some cases rub against the z-axis motor pulley.

 

Do I have the problem?

The easiest way to check if you are experiencing this problem is by checking the position of the laser once your machine is turned on and has 'homed' itself.

 

To test this:

1: Turn off your Emblaser 2.

2: VERY GENTLY and SLOWLY slide your laser unit down to its lowest position. Only press onto the corners of the fan. A little bit of force will be required to move the laser unit down, but please only move it as slowly as possible to prevent damage to your motor and gearbox.

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3: Turn on your Emblaser 2 and allow the it to perform the 'homing' process. When correctly 'homed', the laser unit fan should be sitting approximately 5mm above the laser carriage as shown in the image below.

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4: If your laser unit has not moved all the way up, then please follow the steps below.

 

How to fix this problem:

1: Turn off your Emblaser 2.

2: VERY GENTLY and SLOWLY slide your laser unit down to its lowest position. Only press onto the corners of the fan. A little bit of force will be required to move the laser unit down, but please only move it as slowly as possible to prevent damage to your motor and gearbox.

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3: Using a toothpick, apply a small amount of the synthetic 'Super-Lube' grease supplied into the small gap between the motor pulley and the plastic carriage. See image below.

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4: Turn on your Emblaser 2 and allow the machine to home.

5: Download the following GCode file: LINK

Load this file into Laserweb and run the job. This job will instruct the laser to move into the middle of the workspace and then repeatedly try to move the laser head up and down.

This continuous movement will help spread the grease and remove any binding.

6: While the job is running, there will be a 'beep' as the hear reached the top and bottom. This will help you know whether the laser head is moving all the way and the binding has been freed.

7: In some cases it will be required to apply a small amount of force to the top of the z-axis motor to begin the moving process. Please apply this pressure very carefully.

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8: After a few cycles the binding should be removed and your machine will be running normally. If binding continues, please run the gcode again and repeat from step 7.

 

 

 

 

 

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