Civil Engineering Reference
In-Depth Information
Fig. 1.9. The ram can also be moved out to work on larger workpieces.
Converters
The two main types of converter are the rotary converter and the static con-
verter. The rotary converter will run more than one motor at a time, while the
static converter is only designed to run one motor at a time. If you want to
run two or more machines at the same time or perhaps run two motors on
one machine, perhaps the main machine motor and a motor for the machine's
coolant pump or power feed system, then go for the rotary converter.
Rotary converters cost three to four times more than an inverter depending
on the size and power output required. If you are running one machine at a
time, buy the slightly cheaper static converter. If you fit the static converter
with a three-phase socket connector, you can plug in your different machines
one at a time. This will suit many home workshop users because for safety
reasons you should only run one machine at a time.
SAFETY REGULATIONS
There are several manufacturers in the UK who supply converters and inverters. Make
sure you get one that is CE marked and complies to the EMC regulations, the low
voltage directive and BS EN ISO 61000-3-2: 2006.
