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ProperPrinting

Ender 3 dual Z axis with optional frame braces

by ProperPrinting Jul 14, 2019
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my experience with this.... if I had to do it again, I would go with something else https://www.youtube.com/watch?v=4ZR8LDfO-hg

my experience with this.... if I had to do it again, I would go with something else https://www.youtube.com/watch?v=4ZR8LDfO-hg

Your design is great, I'm going to make more of them.

Even kijken of ik je extruder mount ook kan maken zodat die overweg kan met de petsfang. Zou ideaal zijn.

Awesome, thanks! The extruder mount I've uploaded turned out to be a bit to high which is mentioned in the last comment https://www.thingiverse.com/thing:3556020/comments. I have attached a modified version which should be better but this has to be verified. If you are going to print this thing I'll suggest printing that version of the mount. I'll update it soon.

Swappable hot end with CR-10 FANG OEM fan duct

Hi,

Thank you for sharing your awesome mod. I followed you instructions plus added washers for the wheels. It works fine until near the top of the 300mm rod where it wants to bind. Did you do anything to solve this ?

Hi,

Thanks for making this thing! It sounds like something is not lining out correctly. Are both vertical beams parallel? This can be adjusted with the screws at the bottom. Another thing you can do is untighten the roller pushing against the beam on the side of the second lead screw. Another thing I can think of is that the z-motor itself is not properly lined out in the y-direction. There is an update which solves this: https://www.thingiverse.com/thing:2925230 but I have used some washers between the beam and the motor.

Hopefully this helps!

Ender-3 Z-motor spacer / support

Success! I loosened the rollers and added some grease...and now it’s butter smooth. Thanks again!

Awesome! I'm happy that it runs smooth now. Good luck with it!

Comments deleted.

Hi Jon,

I'm in the process of fitting this great mod to my Ender 3, I have a question regarding the re-assembly of the wheels with the new z axis bracket.
Did you add a washer between the bracket and the wheel? As on mine when I tighten up the bolts securing the wheels to the x gantry they become very difficult to turn. The wheels seem to pinch against the bracket.
OR is it just a case of tightening the bolts just enough and not having a washer as I can tell this will then impact on the new z lead screw being out of alignment.

I really like this mod over the others I've seen as there is no separate tensioner / idler wheel, very elegant.

Thanks

Dave

Hi Dave,

A couple of days ago I came to the same conclusion and I want to add washers in between and post an update. Thanks for mentioning this! I think that the bolts are a little too short so longer ones are probably needed. I noted this down to fix this issue asap. In the meantime, its not a problem that these wheels do not turn, they don't have to be tightened like without the second lead screw so I would loosen them a bit.

I'm happy that you like the design and I'll get back to you as soon as I've fixed it.

Regards,

Jón

I bought 35mm x 5mm button head allen bolts for the new bracket and they are perfect.

Awesome, thanks for the update! So, you've placed washers in between, used these bolts and the wheels are turning as they should? Is it possible to post a make? I haven't seen it used besides mine, that would be cool!

No washers, just backed off the bolts a very small amount, I just posted the make.

Nice, I've seen it, it came out fantastic, thanks!

Hi Jon,

Thank you for sharing this great upgrade for the Ender 3. I'm in the process of sourcing the parts so I can install it.

Could you please let me know what length M3 bolts you used to secure the lead screw nut to the bracket with inserts?

Cheers

Hi Albert,

Nice that you want to use this upgrade, thanks. Both M3×8 and M3×10 will work, the latter being better available.

Good luck and let me know if you have more questions.

Hi Jon,

Thank you for sharing this great upgrade for the Ender 3. I'm in the process of sourcing the parts so I can install it.

Could you please let me know what length M3 bolts you used to secure the lead screw nut to the bracket with inserts?

Cheers

If you have a moment, could you verify these are the needed purchase parts for this fantastic project?

GT2 pulley (60 teeth / 6 mm belt / 8 mm ID)
Lead screw TR8X8 (8 mm / 8 mm per rev. / 50 cm)
TR8X8 - Leadscrew nut 8mm
GT2x6mm Timing belt (696mm closed)

Not even sure what you used for the braces though

Awesome that you are going to add this to your printer!

I have added a list of parts in the post-printing section of this thing and the things you’ve listed are mostly correct. The lead screw needs to be just 30cm long. You can use a 50cm rod but this has to be shortened or it sticks out. A few things need to be added to your list:

  • 4× 608ZZ bearing (OD 22mm, ID 8mm, thickness 7mm)
  • 8-14× M5×10 hexagon bolt*
  • 8-14× M5 washer*
  • 8-14× M5 t-slot nut*
    Amount depends on having the braces or not. If you go to the z-braces thing I’ve uploaded https://www.thingiverse.com/thing:3719799 and scroll all the way down to the post-printing section, you’ll find all parts needed to mount that.

Hopefully this will help and do not hesitate to contact me if you have more questions.

Z braces for Ender 3

Thank you kind sir, I plan to order today and hope to start printing tonight!

Whats the 1mm_shim for?

There is a little bit of play between the pulley and the bearings. The shim removes this play so the second z-rod stays at a stable position. If the corner piece is designed without that play, the bearing will rub against the pulley so it doesn't run smooth.

Thanks how many shims do i need to print? printing this in ABS and iam getting to the Topcorner with brace... Fingers crossed
Bracket and bottom corners looks really nice !

Awesome! I hope the rest will turn out nice as well. You need just one shim on the side of the second rod. The existing rod does not need a shim because it is already fixed by the motor and coupler. Good luck!

Hey what orientation should the parts be printed in?

The bracket is placed with the three collars down and the bottom pieces are placed with the flat side down. The orientation of the top two pieces can be seen in the screenshot I have added.

Hey, do you think I can reuse the parts from my current dual z mod (https://www.thingiverse.com/thing:3440272) for this version?

Ender 3 Dual Z-Axis Mod
by M4n1

Yes, I think that would be possible since the center distance of both rods look similar to my design. Thanks for asking this question on both the YouTube video and here so more people can read the answer ;)

Nice! Thanks for the info ^_^

dang if you ordered all this from reprap you spent a fortune on this mod

That's a good point actually. I spent a mere €40,- and you probably can get this cheaper. I know that reprap ships worldwide and Amazon is not a big thing in my country. I always try to find the most standard parts for my upgrades to make it possible to find cheaper alternatives. I like the service of reprap so I'll get my stuff from there and sometime I use some Dutch sites but most of the people on this platform aren't Dutch. I encourage everyone to find cheaper alternatives which are available in the US and share this :D

Hi, can you upload the source files? i need to recycle this under a different stud diameter.

Sure no problem, I have exported the files from Fusion 360 so hopefully this works for you. Please let me know if you need anything else or need a different format.