![]() The motor is mounted directly in-line with the axis of rotation instead of off to the side, providing an extremely compact footprint. Smoother start and stop motion due to a crossed-roller bearing instead of a large oil-film hydrodynamic bearing common on most other 4th axis units.ġ9mm center bore pass-through for long bar stock means no need to cut stock into small pieces when doing a production run of many parts. No maintenance is required, providing a much lower cost of ownership than an oil-filled worm drive unit, which requires periodic oil changes and top-ups. Compared to a similar size worm-drive 4th axis unit, the microARC 4 achieves anywhere from a 400 per cent to 600 per cent reduction in backlash. The harmonic drive system results in near-zero backlash. The device reduces both operator workload and cycle times with a high-quality, low-maintenance harmonic drive which provides extremely precise motion control, coupled with much higher rapid speeds than a worm-drive unit. The microARC 4 works with all Tormach machines, from the PCNC 440 Mill to the 1100 M/MX Mill. ![]() 3: Use a Tombstone If you’re into making multiple parts at once, a tombstone on a 4th axis is your best friend. K12-100mm CNC Router Milling Machine Rotational Axis 4th Axis A axis Rotary Table A axis 100mm 4 jaw chuck dividing head with 65mm Tailstock Reducing ratio 6:1. ![]() Tormach Inc.’s microARC 4 allows high-precision 4th axis machining in a compact footprint. A 4th axis would make life a lot simpler. ![]()
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December 2022
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