CoreXY
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The CoreXY arrangement and the very similar H-bot arrangements are popular mechanical arrangement for a RepRap motion stage.
The CoreXY and the H-bot are a Cartesian arrangements -- they makes it easy to move the head in straight lines along axis 90 degrees from the other axis.
There is a small change in the belt pattern from the H-bot arrangement to the CoreXY arrangement. Some people say that the CoreXY arrangement is unconditionally better than the H-bot arrangement. "A Core-XY Implementation: overcoming H-Bot design drawbacks and building a laser-paper-cutter". Other people say that the H-bot arrangement is better than the CoreXY arrangement. [1]
A CoreXY and a H-bot are a parallel manipulator system. In other words, the motors on a CoreXY system or H-bot system are stationary.
Parallel manipulator systems, such as CoreXY and h-bot and Dualwire-Gantry (DW-G), typically have much lower inertia than serial stackup arrangements. The lower inertia of a parallel manipulator system, when using the same motors and the same forces, typically gives more rapid acceleration than serial stackup arrangements. (For example, the Prusa i3, RepRapPro Mendel, etc. use a serial stackup -- in other words, some of their motors are pushed around by other motors).
The most common CoreXY printer is the low cost SmartCore
Machines in standard aluminium profiles
| Name | Last update | Description | Movement XY | Movement Z | Useful volume | Size | Speed (print/travel) | Link |
|---|---|---|---|---|---|---|---|---|
| Vulcanus (different sizes) | may 2015 | Frame in aluminium profiles, with metal and printed parts | bearings on rods | 4 rods and two trapezoidal screws (2 motors) | 200 x 200 X 260 (up to 520 x 520 x 1500) | 440 x 440 x 600 | 300 (print? travel?) | http://www.instructables.com/id/Vulcanus-V1-3D-Printer/ http://www.thingiverse.com/thing:821066 http://www.instructables.com/id/Vulcanus-MAX-CoreXY-Aluminum-Frame-RepRap-3D-Print/ |
| VSlot-CoreXY | february 2015 | Modification and update of project AluXY by zelogik/jand while using Openbuild profiles. Good documentation. | V-slot with wheels (said to be more silent) | with 2 rods 12mm and trapezoidal screw 10mm thread 2 | 210x195x240 | 400x400x500 | ? / ? | https://github.com/sdavi/VSlot-CoreXY |
| C-bot | january 2015 | Profiles Openbuilds and printed parts | with V-slot with wheels, non crossing belts | with V-slot, transmissions with 2 trapezoidal screws (2 motors) | 250x250x? | 500x400x400 | ? / ? | http://www.openbuilds.com/builds/c-bot.1146/ |
| RepRap-XY by "jand" | january 2015 | Machine like the AluXY by Zelogic, but with printed parts. Detailed BOM with complementary information | ? / ? | https://github.com/jand1122/RepRap-XY | ||||
| AluXY by "Zelogik" | march 2014 | Aluminium frame with parts in aluminium | rods 8mm with Igus bearings, crossed belts | With two rods and trapezoidal screw | 228x236x217 | 350x350x300 | 200 / 350 | http://forums.reprap.org/read.php?397,297740 https://github.com/zelogik/AluXY |
- "H-bot type Reprap?".
- "H-bot with Fishing line concept."
- "HBot using fishing line" (actually uses the CoreXY configuration)
- "Concept: h.ORD" is a "CoreXZ" 3d printer.
- CoreXZ discussion: "Vertical H-bot with x and z axis?"
- "Tantillus sized h-bot"
