LDO Monolith CNC Gantry Kit

What’s this?

Technical data:

• Drive configuration of the kit: 2WD and AWD
• Belt width: 9mm
• Material: CNC machined aluminium

Features

• Metal Monolith in an easy-to-assemble, aesthetically pleasing package
• 2WD and AWD options in one kit to provide a convenient upgrade path
• Everything included except belts and steppers
• Robust, removable tensioners for easier belting up and pre-tensioning
• 9/10mm belt support (toolhead dependent)
• Genuine Gates pulleys and press-fit live shaft idlers
• AWD front extrusion support for tool-changers

• The shortest and the simplest belt path possible with AWD compatibility
• The shortest moment arms possible for increased rigidity even when reusing hardware and motion parts
• Double shear steppers and live shaft idlers for higher belt tensions and better reliability
• Good-looking design

Performance expectations

• AWD: It doesn’t come at the cost of adding 20cm belt length and idlers, so input shaper scaling can be close to +100% compared to 2WD due to the truly halved effective belt length. But only when no toolhead or frame bottlenecks are limiting its scaling.
• 9mm belts: Wider belts can offer an additional 50% input shaper scaling on top of what’s described above.

• you have to build a well-balanced system: the increased effective belt stiffness with higher-end gantry configurations will amplify toolhead and frame rigidity issues
• Some toolheads are not yet compatible because of the different belt path
• Z-chain relocation or Z-umbilical is needed on Voron 2.4
• Trident rear vertical extrusion brackets have to be rotated by 180 degrees or swapped to regular 2020 brackets based on the gantry configuration

Recommendations

• Made for standard 250-350mm bed sizes
• Upgrade frame for full performance potential (4040, structural panels)
• Best paired with non-modular, performance-oriented toolheads, preferably metal
• Use LDO 2504 (S45R) Speedy Power steppers (45mm round shaft, 2m long cable)
• Quality, high-preload X-rail