EasyIDEX

titusou

Working on this easy to build/maintain IDEX for a while... mechanics nearly done.

The outter-frame (3030 alum extrusion) is sized 550x400x550, with printable area 170x170x250. Not exactly "compact" but that's the cost of IDEX.

Fundamentally it's CoreXYU motion system, 2 motors driving Y, and 2 motors driving XU (CoreXY belt loop).

The whole XYU seating on 2020 alum extrusion inner-frame, which make the building and maintaining easier, a hard lesson from my previous builds.
Belt tension adjusting from front idler tower with hex screws, easier to access.

I decide to go with E3D Hemera XS and Duet3 1LC, because: a) reduce number of wire; b) I think it's possible to add watercooling the whole heatsink/motor/1LC assembly at later day.

I probably need to work more on Z-axis later to improve some design, but for now I need to do electrics first to get it moving.

Stay tune.

o_lampe

@titusou said in EasyIDEX:

Not exactly "compact" but that's the cost of IDEX.

That was also my first impression, but it's build for better maintenance...
Maybe put the linear rail of the x-axis on top of the extrusion: That way you'd have easy access to the screws that hold the toolheads.

oliof

@o_lampe rails on top of X axis also reduces the lever force of the toolhead with a design considering centre of mass, so I second your recommendation.

titusou

@o_lampe
That's another compromise for ease of maintenance.

Entire extruder (inc endstop hidden behind) can be removed with 4 screws (plus PWR and CANBUS wire).

Belt can be removed by 1 screws.

L-extruder has +/- 0.5mm Z travel range for Z-height sync with R-extruder (which has BLTouch)

Dragchain and X-carrier will be printed as single unit later to reduce parts count. I've them as separate pieces to tryout different design instead of reprint entire thing)

Extruder -to- X-carrier alignment block need to be redo later as single longer block at middle.

I'd tried X rail on top design. It work well with Bondtech LGX + Slice Engineering Mosquito combo, basically sandwich the X-carrier between them. But with E3D Hermera there is not much option to move rail to the top, since the mounting hole is on the side.