Hello guys, I have been toying with both Vertical XCarriage and Horizontal XCarriage arrangements and each has its own set of advantages but never both sets in one go. I want my nozzle to be in between XRods and also at the center/middle of the YCarriage and again at the center of the YRods too, to minimize nozzle shifting due to play in bearings, flex in rods, etc. So I am thinking of a horizontal-vertical hybrid XCarriage where one rod is closest to the YRods and the other one remains up just like with the Vertical arrangement. [attachment 79425 SCOUTcorexy_hybridXCarriage_concept-exploration.png][attachment 79426 SCOUTcorexy_hybridXCarriage_concept-exploration2.png] I like that the hotend is not enclosed so much in plastic as with my horizontal XCarriage and it's easier to cool the coldend. It also uses the same real estate as either the horizontal or vertical ones would. It seems like this approach can easier receive a direct extruder (for the horizontal I wouldn't mount a stepper ontop of the thing as it would be too high and would introduce too gig moments while accelerating or decelerating). https://reprap.org/forum/read.php?397,672255,672255#msg-672255 Wed, 20 May 2026 18:05:32 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?397,672255,672681#msg-672681 https://reprap.org/forum/read.php?397,672255,672681#msg-672681 the Horizontal XCarriage I have previously designed and I must admit I don't like this as much... the Horizontal is way better (albeit more complicated to print and put together). I'd rather invest more time in refining that one so I'll drop this design.]]> realthor CoreXY Machines Thu, 09 Jun 2016 09:04:14 -0400 https://reprap.org/forum/read.php?397,672255,672495#msg-672495 https://reprap.org/forum/read.php?397,672255,672495#msg-672495
Imagine this with a hole equal to the outer diameter of the hotend> [www.llamatech.be]

It can be anything. You just want to support it firmly so it dosent go side to side.

Also - On the same subject, in my opinion, you should enclose the hotend so you do not have any cooling air escaping down on the part being printed, but there is no consensus about the strict necessity of this. I only print ABS.]]> LarsK CoreXY Machines Wed, 08 Jun 2016 17:23:49 -0400 https://reprap.org/forum/read.php?397,672255,672476#msg-672476 https://reprap.org/forum/read.php?397,672255,672476#msg-672476 Horizontal XCarriage the only way I have found was to have 4 screws pointing and touching the hotend central column to keep it constrained. But any plastic there will most certainly creep because of heat and any metal there will obstruct air flow from the fan.

The more I think about it the more the 4 screws seem to be the logical choice....]]> realthor CoreXY Machines Wed, 08 Jun 2016 16:12:01 -0400 https://reprap.org/forum/read.php?397,672255,672338#msg-672338 https://reprap.org/forum/read.php?397,672255,672338#msg-672338
I start to like more and more this arrangement as it's quite perfect for both bowden and direct extruder. If you have the direct extruder which has the heatsink embedded in the motor mount and short heatbreak and heaterblock you can just insert the whole package in the place where I have the fan in the picture below and have a very very compact printhead. I'll come back with a design for that later. For now here's what I have:

[attachment 79431 SCOUTcorexy_hybridXCarriage_wDirectExtruder.png][attachment 79432 SCOUTcorexy_hybridXCarriage_wDirectExtruder2.png]

I am yet to find a good way to funnel the air from the squirrel-cage blower for the Part cooling (tbd).]]> realthor CoreXY Machines Wed, 08 Jun 2016 09:47:50 -0400 https://reprap.org/forum/read.php?397,672255,672335#msg-672335 https://reprap.org/forum/read.php?397,672255,672335#msg-672335
Basically, for any design with two smooth rods you pay a toll on the print area. The distance from rod to rod plus bearing size is print area lost relative to your outer frame diameter. A bigger outer frame means more bracing and more weight all around.

The decision about mounting the two rods vertically or horizontal is then in-parts about either sacrificing Z height (vertical) or Y length (horizontal).

When you make like you do now, you are sacrificing both Y and Z length - But maybe you can do them closer together in this design? So it will be sort of a compromise between the two.

The advantage is that it will be easier to mount the hotend in a solid way. You can latch on to it both top and bottom and you get that nice "natural" position for the fan.

The belts are maybe easier to place in the center of rotation (like you sketched it now).

Actually I kinda like it. Now making a bracket for it on the Y carriages is the hard part, like it is the hard part for all vertical mounted rod designs.]]> LarsK CoreXY Machines Wed, 08 Jun 2016 09:38:34 -0400 https://reprap.org/forum/read.php?397,672255,672255#msg-672255 https://reprap.org/forum/read.php?397,672255,672255#msg-672255
I have been toying with both Vertical XCarriage and Horizontal XCarriage arrangements and each has its own set of advantages but never both sets in one go. I want my nozzle to be in between XRods and also at the center/middle of the YCarriage and again at the center of the YRods too, to minimize nozzle shifting due to play in bearings, flex in rods, etc.

So I am thinking of a horizontal-vertical hybrid XCarriage where one rod is closest to the YRods and the other one remains up just like with the Vertical arrangement.

[attachment 79425 SCOUTcorexy_hybridXCarriage_concept-exploration.png][attachment 79426 SCOUTcorexy_hybridXCarriage_concept-exploration2.png]

I like that the hotend is not enclosed so much in plastic as with my horizontal XCarriage and it's easier to cool the coldend. It also uses the same real estate as either the horizontal or vertical ones would.

It seems like this approach can easier receive a direct extruder (for the horizontal I wouldn't mount a stepper ontop of the thing as it would be too high and would introduce too gig moments while accelerating or decelerating).]]> realthor CoreXY Machines Wed, 08 Jun 2016 06:11:35 -0400