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GregoryHolloway

BigBox IDEX Titan Aero With MGN12 Linear Rail

by GregoryHolloway Sep 8, 2017
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Hi,

I have just seen this and I am wondering did you have sufficient stiffness unsi the MGN12 rail only without any extrusion or other structure as support ? I am thinking of converting a Rat Rig V-Core to linear rails and your design would be pretty neat if its stiff enough.

Thanks
Jan

Keep the weight low and you'll be fine with just the rail.

Hey Gregory,

I am now onto building a linear rail based custom IDEX printer. And I am looking at using your IDEX parts here as the X Axis. (Not doing COREXY, doing a dual stepper Y, and dual X stepper setup for the IDEX).

You by chance have the full fusion build you have the image of in the "how I designed this"? Trying to get some quick and dirty dimensions for my 300x300 build I am work on and that would save me a ton of time :)

Finally i'm revisiting this. My left side bracket wont hold the left side belt securely. The more tension i place on the front tension screw the more the belt pulls out. How bets to fix?

You are using grub screws to secure it, yes?

Hi Greg! I ordered the parts from e3d but just realized that the mirrored titan upgrade may not come with all the parts to turn my standard titan to mirrored. Am I correct? Do I still need the "mirrored body"? If so, can I order that piece?

Hi,

Contact support@e3d-online.com if you have any questions about your order.

I've noticed (after printing) the NEMA11 mounts are slightly angled downwards off the X axis.
I assume there's a reason, so i'm curious what the reason is :)

Oh, and one more thing. Do you have any plans for a combination of http://www.thingiverse.com/thing:1531536 and http://www.thingiverse.com/thing:2189819 ? Or is http://www.thingiverse.com/thing:2189819 already compatible with the IR probe mount?

Thanks!

BigBox Z-Axis Bed IR Sensor Mount.
BigBox Integrated Lead-Screw Anti-BackLash Nut Z-Axis Drive Brackets

Hi,

Bad CAD on my part I expect. Nothing intentional.

Check the thingfiles tab for the IR version of the anti-backlash bracket, it's already there.

Any reason not to print the parts with Edge?
I'm having some serious warping issues with MatX (to the point where, if the parts don't get unstuck from the bed, they delaminate).

Nopes, none at all.

If you are feeling adventurouse and want a super stiff system I say give protopasta's PLA Carbon Fibre stuff a go. PLA is ridgid and it's crazy stiff when you add CF to it. The stuff prints like a dream, you will need a hardened nozzle to print it though.

Just be warned that the motors will need to be tuned correctly to help mitigate overheating as the PLA could soften if it gets too hot. I have had that happen!

If you do want to go the CF route maybe look for a nylon CF filament. Just be sure to dry it out before you use it!

I've got some XT-CF20 (and hardened nozzles) left over, so i might give that a try.
Its glass transition is supposed to be higher than regular PLA (80ish deg C, i believe?), so maybe that'd do the trick.

The parts look beautiful in XT-CF20!
https://scontent-vie1-1.xx.fbcdn.net/v/t35.0-12/s2048x2048/25634969_10155221478971404_864047899_o.jpg?oh=d37f23dfaa1a95336a83c78666ddc6ce&oe=5A3E5122

The Titan bracket still has a bit of a flex on the far side (the one without the triangular cross-member) when bent by hand, but seems stiff enough for real world use. We'll see how it fares when warmed up by the stepper when all the parts arrive and i finally assemble everything.

Wow very nice print!

Awesome, thank you.
That's my next planned upgrade after IDEX.

Hey Greg, I am finally getting around to this upgrade, Just got a bunch of the stuff in, but I don't want to purchase the Titan Aero's since i have the Titans, I am modeling it up seeing if I need to change anything, however I was wondering if the two nozzles were supposed to be offset by 12.2372mm in the y axis, or if they were supposed to be inline in the x axis.

Hi,

Supposed to be offset so the two gears don't collide (https://wiki.e3d-online.com/Titan_Assembly#Mounting_Options) and of course to allow room for the belts etc.

"4 x Metre GT2 Belt" -- Is that 4m of belt? The belt it links to comes in 10cm increments, so 4 x that item == 40cm, not metre. I assume it should be 40 x 100mm GT2 Belt?

Currently printing this to convert my big box to duel extruder will keep posted

Very nice design and looks like a good improvement to the dual X rods. Waste less space where the extruders are. In process of making a Dual Nimble / Chimera carriage based on the stock X carriage this design with a linear rail really sings to me.

A suggestion would be to try to make the Y bearing clamps removable. So we do not have to dismantle the BigBox as much implementing the mod. Having Chases dual titan mod today I do not have to do this to remove the complete Y-X carriage. Not having played around with the files yet I'm not sure if it is feasible at all. This it something I will look at before converting to this design but that will be some time in the future.

Regards
Stian

Looks like you printed the parts in Edge Dark Crystal, which is my favourite filament. Is so, do you find that to be rigid enough and what did you use for the cooling fan?

Use MatX for all parts if possible.

Looks interesting, are you going to post a "how to do" in the E3D forums?

ok will do, thakns

Nope.

It's fairly self explanatory, but if you, or anyone needs assistance, start a thread and link it here. I'll jump in and help.

Hi Greg,

Few questions; been running your Direct Idex design for a while now and already moved to Aero but to compensate for the reduction of hight i am also running Volcano hotends on both heads.

So now for the questions:

Does this design give any more bed space over your original IDEX direct design? I.e. are the Y Axis bearing and motor mounts any thinner? I can see your using NEMA11 hence my question (and i want as much bed space as possible)
Is there enough room for NEMA14 motors on Y? I found the 14Ncm Nema14's to be way to puny so reluctant to use NEMA11 at all if max torque is 12Ncm. too much layer shift if nozzel hits a rough patch of material. If NEMA 14 is not possible but there is increased overall movement on X and X2 (U) then that might be an tradeoff worth making.

Is the MGN12 rail stiffer than 2 8mm rods?

Is the rear mounted cooling fans adjustable, i.e. do you think it could be moved down a bit for Volcano hotends?

Is there space to use IR Z endstop on the head (as i can see you use it on the bed but I use Duet with automatic mesh bed levelling and independently driven z motors to level left and right, which works very well), happy to make a shim but cant see from the photos if there is a place.

Love the work! look forward to giving this a go as currently i am running my IDEX sans cooling fans as the ones i made were extended but part covered the AERO fans... Not idea and the length started to sag so just printing everything but PLA so would love to try this.

Finally thanks for including the f3d files! You are a credit to the open source world! (now to try and get them into OnShape as thats what i am learning with)

Hi,

In answer to your questions....

Does this design give any more bed space over your original IDEX direct design?

     Yes, probably. I'll have to check.

Is there enough room for NEMA14 motors on Y?

    Do you mean the X- Motors? The NEMA 11s work fine. I use them on the IDEX Bowden System and have had no issues. If your printer is correctly calibrated you shouldn't have problems with 'rough patches'.

Is the MGN12 rail stiffer than 2 8mm rods?

   I haven't done any scientific measurements to give a definite answer. However using a linear rail reduces weight and reduces lash. From feeling things is definitely seems more rigid.

Is the rear mounted cooling fans adjustable, i.e. do you think it could be moved down a bit for Volcano hotends?

   Nope, but one could adjust the design of the fan duct to make a version compatible with the Volcano. I'll see what I can do this week.

Is there space to use IR Z endstop on the head (as i can see you use it on the bed but I use Duet with automatic mesh bed levelling and independently driven z motors to level left and right, which works very well), happy to make a shim but cant see from the photos if there is a place.

  I did consider it but as I use manual mesh leveling, I didn't. Maybe hang them off the fan ducts at the rear?

Thanks! Ill give it a go as is (plus Volcano). Now to decide China with weeks wait time or 4 x the cost for Igus and local.... Hmmm....

Thanks Greg. Is that link the rail with the shorter standard blocks? I have a Misumi account now so just want to make sure before I hit order. I see they do a "short block" but that only goes up to 470mm rail and 2 hole block not 4 so I assume you dont mean that one?

Hi, yes that should be the standard blocks. The short blocks as you correctly notice, only have the two holes for mounting.

Do you have the firmware for running the IDEX setup?

I meant, like a copy of the firmware you are running with this setup? I am looking to upgrade my BigBox in the future and I like the IDEX setup.

Thanks
Chase

I'd download a fresh copy when the time comes and configure that tbh. There's nothing special about the configuration per say, but the machine it is installed on is different to a standard machine (the bed is in a different position and the Y-Axis Motor is on the outside of the rear frame).

I can talk you through things if needs be.

nice work! looks very interesting

Thanks, it prints very well.