Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2865191.

Although I designed this tool to align the Y rods on my Prusa MK2 Bear modification, it can work equally as well on the Original Prusa MK2.

Why do you need this alignment? If the Y rods are not parallel and properly separated, stress will be put on the Y rod bearings which will cause them to loosen and wear prematurely. Also, the stepper motors may lose steps because of the stress. In addition, if the rods are not in alignment with the frame, then the firmware needs to make calculations to compensate, which is not the best way to get things square.

How do you use the Y Alignment Tool (from now on referred to as ‘YAT’)?

First, attach your front left corner Y rod mount in the position suggested by Prusa or the Prusa Bear. This will act as the reference point for all other points. The other three Y rod mounts, with rods attached, should be able to more freely.

Second, you snap the YAT onto the top farthest point of the Y rods, just short of the Y rod mounts. Now, you need to square the Y rods to the frame. This is done by looking down on the bed and seeing if the frame is square with the marking on the bed. See picture #2. This alignment by sight might seem crude but is actually very accurate. When you move the connected Y rods from side to side, the alignment with the bed lines will change. Very little movement is needed to make a noticeable change. When the alignment is square, fasten the back two Y rod mounts to the frame.

Now remove the YAT from the back rods and connect it to the top front of the Y rods close to the Y rod mounts. The remaining right front mount should still be loose and move freely. With the YAT in place, fasten the right front Y rod mount to the frame. 
You should now have a perfect alignment. To check your work, you need to run the ‘Prusa XYZ calibration’ which is found in the 30.1.2 or newer firmware. When the firmware calibration has finished, the results are stored. You can see the results on the LCD screen. Look under: LCD Menu - Support - XYZ cal. details. If you need further help, see this Prusa web page which explains the XYZ Calibration details.

https://help.prusa3d.com/l/en/article/PBlnvMN6pt-xyz-calibration-details


Prusa Y rail alignment tool

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4512188.

This is a simple adaptor to mount a 30mm fan into a 40mm mount area.

40 to 30mm fan adaptor

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2977425.

This is a handy addon for the Prusa Bear - Keep track of your SD cards.

Bear SD card holder

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4967340.

This a replacement part for a Hitachi sliding miter saw model C 10FS. This may work on other Hitachi miter saws. The table inserts become damaged after much use and need replacement.

The inserts are longer than the 3D printer bed, so they are printed in two parts that are joined after printing. The joint is a very tight slip fit. Place the parts in alignment and strike together with a soft face mallet. The joint is very tight and cannot be separated.

Print as presented using Prusa slicer preferably with the variable height feature.

Hitachi Miter Saw Table Insert

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3319637.

not really a remix, just an addition to a great file that I found useful but had no way to Mount. I put it inside a door to save space.

Ikea mounting board

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2225139.

8-25-2020   This STL file has been updated now that I am proficient in Fusion 360. 

This is a wrench to tighten the nut holding the PINDA probe. Because of the location and size, it is difficult to do with the needle-nose plyers and there is a hazard of letting a metal wrench or plyers fall on the bed.

This was designed with SketchUp Make and exported to an STL file.

Prusa 3d slic3r was used for the slicer with standard-setting. PLA was the material

Prusa i3 MK 2 probe nut wrench

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2977412.

This object designed as an addon for the Prusa Bear frame upgrade which I highly recommend. 

ihttps://www.thingiverse.com/thing:2808408s 

The SD cards easily accessable and prevents damage from just laying around. 

You will not have access to the slot in the side rail to mount the object, so use the drop in nuts found here:

https://www.thingiverse.com/thing:2881880

You will also need 1 M3x12mm bolt.

Print the object as presented without supports. I used PLA and it was very nice.

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Prusa Y rail alignment tool

40 to 30mm fan adaptor

Bear SD card holder

Hitachi Miter Saw Table Insert

Ikea mounting board

Prusa i3 MK 2 probe nut wrench

Bear SD card holder