For Sale:
New in original box Omron 3G3MV-C2022 VFD inverter drive.
230VAC, 3PH and rated at 3HP. The drive accepts both analog and
frequency reference signals. Using the step signal from Mach2 you can
control the spindle speed without using any intermediate processes or
hardware.
I also have a new Yaskawa with the same specifications as above drive
with the exception of it being rated at 1HP.
New in original box: Red Lion Frequency to Analog Voltage Converter +
Has an integral power supply which operates on 115VAC and will
process 0 to 10kHz frequency input and outputs analog voltage
proportional to the input frequency. Accomplishes the same task as
the drive above but it is an intermediate process. Would be a great
solution for spindle speed control for applications using an analog
only drive.
Two Analog Amplifiers new in original box: (picture in group photos)
Theae cards are for use with the PWM signal that Mach2 distributes
through the PC parallel port. Do not confuse this hardware with the
single OPT AMP circuits that have been associated with non-linear out
put from the PWM spindle speed signal. These are a professionally
engineered piece of hardware that is manufactured by a company that
has electronic components orbiting in outerspace. The cards have a
low offset and a high gain that will will facilitate a true 0 to
10VDC and can go as high as 20VDC should the application require it.
Power for the analog output requires an isolated 24VDC power supply.
When I tested the hardware Mach2 was operating at 45kHz with the PWM
base frequency set to 45Hz. (45,000 / 45 = 1000). The maximum speed
for the selected pulley ratio was set to 1,000 RPM. (1 / 1,000
= .001) Starting at 1 RPM the analog voltage output was .001 and with
each increase of 1 RPM the voltage increased by .001VDC and continued
to do so until the commanded spondle speed was 1,000 RPM
