To control the drive of a dust collector motor 20 interlocking with the operational status of the body 40 of an electric tool 200 without the influence of a subsidiary device 50 included in the electric tool 200 connected to an electric outlet 11.
An interlock controller 30 measures current passing through the electric outlet 11 during operation of the electric tool 200, and a voltage value of an alternate power supply, and then discriminates the operational status of the body 40 of the electric tool 200 by calculating an effective value and a form factor of the current of the electric outlet from these measured values, and by comparing them with their respective threshold values. The interlock controller controls the operation (drive/stop) of the dust collector motor 20 based on the discrimination result.
COPYRIGHT: (C)2010,JPO&INPIT
INABA MASAHIRO
HAYAMA YOSHIMASA
KAKEGAWA DAISUKE
| JP2007190527A | 2007-08-02 | |||
| JP2006292555A | 2006-10-26 |