Electric current - Import export

2-phase high-torque stepper motor in NEMA 17, NEMA 23 and NEMA 34 sizes with flat-milled shaft (D-shaft). 1.8ׄ° increment angle (full increment) with integrated positioning control. Note: Stepper motor with integrated positioning control. It forms a convenient unit consisting of stepper motor and intelligent controller. Reference travel is possible on a block with reduced electric current without proximity switch. Integrated rotational monitoring. Smooth running through dynamic switching of increment trip. Actuation via single I/O interface, 31 position configurations and call-ups. Control unit can be parametrised quickly and conveniently with the software. The software and manual for programming the positioning control are available as free download. When selecting a suitable motor, using just the retaining torque is not enough, as the motor’s torque decreases with the speed. It is therefore essential to select the correct motor according to the torque curve.

This technology was implemented as part of a transfer of technology from ONERA – National Laboratory for Aerospace Research – who developed it for its own needs. The technology contributed amongst other things to the manufacturing of electrode plates in silica for space accelerometers – GOCE project from ESA. Principle The principle is based on an electrical current – at a given frequency that fits within the field of ultrasounds –converted into a mechanical vibration that is transferred to a machining tool. The vibration frequency of the tool corresponds to the frequency of the electrical signal – in this case 20 KHZ. Our ultrasonic machining process differentiates itself from other processes because machining is carried out without contact between the tool and the part. Equipment A resonating block made up of piezoelectric ceramics transfers the vibration to the tool through the sonotrode. The mechanical expansion of the tool – so-called tool elongation – can be adjusted and...