The Phoenix uses timing belts on all its axes, so you should not usually need to replace belts unless they were mis-cut here at Ez3D.  However, if excessive downward pressure is applied to the carriage, the belts may rip out of their clamps and need to be re-seated.  This article will cover how to replace your belts.


First, unscrew the belt clamp on the underside of the left cap.



Unthread the belts from the clamp.


Unthread the belts from the counterweights and carriage.


Next, unscrew the belt clamp on the underside of the right cap.


Then, unscrew the secondary belt clamp on the underside of the left side cap near the stabilizer rod.


Now that you have unthreaded all your belts, you can begin re-threading them.


First, take the shorter belt and attach it to the first belt clamp like this:

It should thread in, teeth down, to the groove closer to the rounded side.


Then, take the longer belt, and thread it through the other groove, teeth down.


Screw the belt clamp back into place on the left side of the printer.


Wrap the shorter belt around the counterweight bearing towards the back of the printer.


This belt will then wrap back to the top of the printer, where it wraps around the bearings closer to the back of the printer.


Once the belt is wrapped around these bearings, it will then be headed down towards the motors.  Wrap the belt around the top motor.


This belt will then proceed back to the top of the printer, at which there is another set of bearings to wrap the belt around.


At this point, thread the belt back through the remaining red belt clamp:

This belt threads in teeth-down.


Screw this belt clamp back into place near the stabilizer rod.


You should then be left with a loop.  You will thread the carriage around this loop in the final step.


We'll now thread the long belt through the remaining counterweight bearing.


When the belt reaches the top of the printer, you'll thread the belt over the bearings near the front of the printer, much like with the previous belts.


You will then pull this belt down towards the motors.


You'll want to take the end of this belt and thread it through the carriage.


This belt is now heading towards the top of the printer.  There is another bearing at the top cap, near the front of the printer, to thread this belt around.


This belt then reaches across the printer to the bearing underneath the right cap.


You'll then want to thread the belt end through the right belt clamp.  On this belt clamp, the teeth are facing outwards with the smooth side against the plastic.


Then screw the belt clamp back into place.


You'll then be left with a loop on the right hand side.


We'll thread these loops through the bearings on the carriage ends.  To make this easier, remove the washers that hold the bearings in place.


Then, raise the carriage to loop the belts around the bearings.


Once the belts have been re-looped, you can then screw the washers back into place, and you're done!