Prusa Mini Silicone Bed Leveling Mod  

RE: Prusa Mini Silicone Bed Leveling Mod

@willdeed

Hi wildeed, I too cannot DM yet. I am trying to get in contact with you for a kit. Thanks, Gardiner

RE: Prusa Mini Silicone Bed Leveling Mod

Sorry for not checking this thread for folks who can't PM. I sent messages to folks who want a kit, let me know if you didn't get one.

Also, I think this link should be the first part of the mod: https://help.prusa3d.com/en/article/xz-axis-skew-correction-mini_158518

I didn't understand how skew was compensated for when I did the mod. I now think that one should use the above method to fix any skew before you start the mod using the fixed spacers as a reference. That will make the level tweaking go much easier. I should have done that before I did my mod.

-Jim

RE: Prusa Mini Silicone Bed Leveling Mod

@mcjamez

Hi, sorry I still need 4 more posts before I can answer your DM. My email is my username here @saccucci.com. I can respond that way.

Just completed that skew correction. I was a over a mm off. Thanks.

RE: Prusa Mini Silicone Bed Leveling Mod

@gardiner

How many posts do you think you have? 

regards Joan

RE: Prusa Mini Silicone Bed Leveling Mod

@joantabb

Thanks. I apologize if I am annoying anybody.

RE: Prusa Mini Silicone Bed Leveling Mod

The skew correction seems to eliminated  most of my issue.

RE: Prusa Mini Silicone Bed Leveling Mod

I have ordered a precision square to calibrate it as well. The bed is mostly unlevel at the 200 200 spot by the Z axis. This should be 5!

RE: Prusa Mini Silicone Bed Leveling Mod

@mcjamez

Thanks, I got your message but I can't reply (because I'm new). I'll try and reply to a few threads and see if that does it. 

RE: Prusa Mini Silicone Bed Leveling Mod

Thanks to mcjamez for posting link to xz skew from prusa knowledge base.  I checked my bed level and it was 0.5 mm off all along the left hand side.  I adjusted per the linked arcticle and now have it down to 0.147 varaiation across the whole plate.  Got 1 hight spot in the middle that the xz adjustment cant fix.

Sorry for not checking this thread for folks who can't PM. I sent messages to folks who want a kit, let me know if you didn't get one.

Also, I think this link should be the first part of the mod:  https://help.prusa3d.com/en/article/xz-axis-skew-correction-mini_158518

I didn't understand how skew was compensated for when I did the mod. I now think that one should use the above method to fix any skew before you start the mod using the fixed spacers as a reference. That will make the level tweaking go much easier. I should have done that before I did my mod.

 

-Jim

RE: Prusa Mini Silicone Bed Leveling Mod

in the bed level program made by @benji which is the front  row of screw row 0 or row 3?

RE: Prusa Mini Silicone Bed Leveling Mod

@rockytoptim

Reading the Prusa Mini MBL output, left to right:

Reading the converter's output, left to right:

To answer your question, row 0 is the front row of the MBL output. 

BTW: looking at your output, it seems your Z/X gantry is not perpendicular to your Y-axis. Please deal with that before attempting the silicone mod.

RE: Prusa Mini Silicone Bed Leveling Mod

@rockytoptim

Your 1/1CW value is near to bed power connector. 

So it is as you see from the front of the printer. Convenient. 

RE: Prusa Mini Silicone Bed Leveling Mod

@benji

Thanks for the detailed documentation 👍 

The problem with adjustment is that the bed is fixed on 9 points and can therefore only be adjusted with approximate accuracy. But with a little patience you can get into the range of 0.05mm, which is usually perfectly adequate, since the printer compensates the height to a certain extent anyway.

I have done the modification with hardened steel springs, which have proven themselves well over the years. Sometimes (after maintenance) only minimal (some hundredths of a mm) readjustment is required .

I used normal countersunk screws with hexagon socket and only reworked the counterbores of the heating bed carefully.

I used this mod on the MK3 and the Mini.

RE: Prusa Mini Silicone Bed Leveling Mod

@benji

Thanks Benji.  Thats the way I was reading it just wanted to make sure.  The data in my post was after installing silicon tubing and did first auto bed level.  I had before installing mod adjusted for xz skew.

Thanks for the write up and the program for the adjustment.

RE: Prusa Mini Silicone Bed Leveling Mod

@karl-herbert you got a link for your Y carriage mod? It looks amazing, no more overtightening those screws on the carriage.

RE: Prusa Mini Silicone Bed Leveling Mod

@kormirluk

No link - self construction and printed either with Nylon, ABS or PETG. I would not use PLA:

Bearing_Holder_MK3_Mini_15.10_STL

These can be used on both the MK3 and the Mini. The bearing hole is dimensioned to 15.10, but can be adapted to your own requirements (usually larger).

RE: Prusa Mini Silicone Bed Leveling Mod

I would recommend to fix the bearings with heat-resistant silicone glue.This will allow them to adapt to any possible deviations (on the floating bearing side) of the guide rods. A screw clamping is rather unsuitable.

RE: Prusa Mini Silicone Bed Leveling Mod

Let's see what we get with ABS+! 🙂

RE: Prusa Mini Silicone Bed Leveling Mod

@kormirluk

Most people report that the 15.10 holes are printed too small. If this is the case for you, I can provide you with a step file to modify the holes.

You can get M3 thread inserts e.g. here: M3 thread inserts or in many other printer supplies stores.

RE: Prusa Mini Silicone Bed Leveling Mod

Gepostet von: @ karl-herbert

@kormirluk

Keine Link-Selbstkonstruktion und entweder mit Nylon, ABS oder PETG bedruckt. Ich würde PLA nicht verwenden:

Bearing_Holder_MK3_Mini_15.10_STL

Diese können sowohl beim MK3 als auch beim Mini verwendet werden. Das Lagerloch ist auf 15,10 dimensioniert, kann aber an Ihre eigenen Anforderungen angepasst werden (normalerweise größer).

 

 

Ich habe mal eine Anmerkung, ich habe auch den Feder Mod gemacht und bin sehr zufrieden, nur das der Y-Schlitten bei mir aus Carbon ist mit M3 Gewinde. Nur kann ich nicht zustimmen, das der Bearing_Holder auf MK3 und MINI passt, beim Loslager gibt es nämlich ein Problem, das man bei der MINI-z-plate-bottom hängen bleibt, daher musste ich das ändern, es reicht schon, wenn die eine Seite von unten 45° verläuft und das Problem besteht nicht mehr.