Thingiverse
Prusa Z Metal Bracket Alignment Helper
by Thingiverse
Last crawled date: 5 years, 3 months ago
I don't think anyone asked for this or will find it. But I figure I will at least put it out into the thingiverse void in case it helps someone.
This is specifically designed for these parts manufactured by Funssor, often sold on Aliexpress. Here is the title of the listing in case it disappears:
"1set Funssor aluminum alloy Z axis lead screw rod top/stepper motor bottom holder kit for upgrade Prusa i3 MK3 bear upgrade"
Not designed for these which are for regular Prusa machines without the bear upgrade.
One thing you will quickly notice if you buy those parts is that, they do not have the Vslot grooving that the printed parts do from pekcitron. This makes them very hard to orientate. Also, the center hole that the leadscrew goes through is not horizontally centered on the part, there is some extra on the sides facing inwards to the bed. This makes centering them to the extrusion very difficult.
In general, they are hard to get on, because they do not have a cutout for easy stepper removal. A side tip, the only way I found to use these on my machine without removing the entire top Z extrusions from the base, was to make a small custom allen key with a very sharp and short bend. Then, I wiggled the Z stepper forward to give me enough room to cram the key in and tighten the aluminum bracket.
Or, you can simply put those parts on the vertical extrusions before bolting them to the base of the printer. Make sure to put your steppers in because when your extrusions are tightened and the brackets are too, there is no way to get the stepper in there because of it's non-removable leadscrew.
To use these, you can look at the picture. That is how to use it on the rightside of your printer with your right Z. The part needs to be flipped to use it on the left side of your printer. By default the part has letters on each side to indicate correct direction depending on the side you are connecting the bracket to. If you are on the left, you should see the letter "L". And reverse for the right side. I am aware the picture shows it as if I was attaching on the base - I'm not, it's just for illustration in relation to 2040 extrusion.
This is specifically designed for these parts manufactured by Funssor, often sold on Aliexpress. Here is the title of the listing in case it disappears:
"1set Funssor aluminum alloy Z axis lead screw rod top/stepper motor bottom holder kit for upgrade Prusa i3 MK3 bear upgrade"
Not designed for these which are for regular Prusa machines without the bear upgrade.
One thing you will quickly notice if you buy those parts is that, they do not have the Vslot grooving that the printed parts do from pekcitron. This makes them very hard to orientate. Also, the center hole that the leadscrew goes through is not horizontally centered on the part, there is some extra on the sides facing inwards to the bed. This makes centering them to the extrusion very difficult.
In general, they are hard to get on, because they do not have a cutout for easy stepper removal. A side tip, the only way I found to use these on my machine without removing the entire top Z extrusions from the base, was to make a small custom allen key with a very sharp and short bend. Then, I wiggled the Z stepper forward to give me enough room to cram the key in and tighten the aluminum bracket.
Or, you can simply put those parts on the vertical extrusions before bolting them to the base of the printer. Make sure to put your steppers in because when your extrusions are tightened and the brackets are too, there is no way to get the stepper in there because of it's non-removable leadscrew.
To use these, you can look at the picture. That is how to use it on the rightside of your printer with your right Z. The part needs to be flipped to use it on the left side of your printer. By default the part has letters on each side to indicate correct direction depending on the side you are connecting the bracket to. If you are on the left, you should see the letter "L". And reverse for the right side. I am aware the picture shows it as if I was attaching on the base - I'm not, it's just for illustration in relation to 2040 extrusion.