Compact, precise fourth axis unit
- May 2, 2021
The microARC 4 works with all Tormach machines, from the PCNC 440 Mill to the 1100 M/MX Mill.
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 harmonic drive system results in near-zero backlash. 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.
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.
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.
19mm 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.
The motor is mounted directly in-line with the axis of rotation instead of off to the side, providing an extremely compact footprint.