Gears and transmission
CoreXY Pen Plotter Gantry
- Bounding box
- 302.0 × 400.0 × 109.1 mm
- Engine
- Precision B-rep
- Parameters
- 33
- Published
- August 20, 2026
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The prompt
Isometric technical CAD rendering of a lightweight CoreXY pen plotter gantry, clean white background, clear mechanical breakdown.Linear Guide Rail Geometry:Two parallel, stationary aluminum L-profiles mounted on a rigid base frame. The two L-profiles are oriented facing each other at $45^\circ$ angles to create an internal diamond-shaped captive track cross-section ($< >$). The internal faces of the aluminum channels are lined with thin amber Kapton tape topped with slick white UHMW PE tape.Moving Bridge Assembly:A single lightweight transverse aluminum L-profile forming an H-bridge. At each end of the bridge, a custom 3D-printed housing sits inside the captive diamond track. Each end housing contains two inline miniature ball bearings spaced apart along the rail vector. The bearings roll directly on the internal 45-degree tape-lined surfaces of the stationary diamond track to prevent racking and lateral wobble.CoreXY Drive System:Two stationary NEMA 17 stepper motors mounted to the rear corners of the outer frame. Black GT2 timing belts routed through smooth idler pulleys at the frame corners, running parallel to the diamond guide rails, attached directly to the moving bridge housings.Central Carriage:A minimalist pen-holder carriage mounted on the transverse bridge profile with a high-speed micro-servo pen-lifter mechanism.Style: High-resolution orthographic CAD model, clean dark gray/aluminum texture, transparent blue dimensional annotations, callout leader lines detailing "Captive $45^\circ$ Diamond Rail," "Inline Dual Bearing Housings," "UHMW PE Tape Interface," and "CoreXY Stationary Motors." Engineered, industrial design aesthetic.
Parameters
| Name | Value | Range |
|---|---|---|
| Base Length | 300 mm | 200 – 500 |
| Base Width | 200 mm | 150 – 400 |
| Base Thickness | 10 mm | 5 – 20 |
| Rail Leg Width | 20 mm | 10 – 40 |
| Rail Thickness | 3 mm | 2 – 8 |
| Rail Length | 300 mm | 200 – 400 |
| Rail Inner Spacing | 250 mm | 150 – 350 |
| Rail Tilt Angle | 45 deg | 30 – 60 |
| Rail Z Offset | 15 mm | 5 – 30 |
| Bridge Leg Width | 20 mm | 10 – 40 |
| Bridge Thickness | 3 mm | 2 – 8 |
| Bridge Length | 250 mm | 150 – 350 |
| Bearing OD | 16 mm | 8 – 30 |
| Bearing ID | 8 mm | 4 – 20 |
| Bearing Width | 5 mm | 3 – 10 |
| Housing Wall Thickness | 3 mm | 2 – 6 |
| Motor Width | 42 mm | 35 – 60 |
| Motor Depth | 40 mm | 30 – 60 |
| Shaft Diameter | 5 mm | 3 – 10 |
| Shaft Length | 22 mm | 15 – 30 |
| Belt Width | 6 mm | 4 – 12 |
| Belt Thickness | 2 mm | 1 – 4 |
| Pulley Outer Diameter | 20 mm | 10 – 40 |
| Pulley Width | 10 mm | 6 – 20 |
| Pulley Bore | 5 mm | 3 – 10 |
| Carriage Width | 50 mm | 30 – 80 |
| Carriage Depth | 30 mm | 20 – 60 |
| Carriage Height | 20 mm | 10 – 40 |
| Servo Width | 22 mm | 15 – 30 |
| Servo Depth | 12 mm | 10 – 20 |
| Servo Height | 24 mm | 15 – 30 |
| Pen Holder Diameter | 8 mm | 5 – 15 |
| Pen Holder Length | 30 mm | 20 – 50 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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