J
JR North
- Jan 1, 1970
- 0
Long....
Project overview:
Converting JRC 1800CP Marine Radar 18" radome to open array configuration.
http://www.jrcamerica.com/product.asp?Product_Id=17531&d_Id=5607&l1=5600&l2=5607#
I had to upgrade the tiny unipole stepper drive for the antenna to a
much more robust bipolar motor with an aux 2 amp driver board.
http://www.tecel.com/st200/
The antenna board has an onboard driver clocked to turn the antenna at
32 RPM. I'm using the clock input to this driver to drive the aux driver
board.
However....
The difference between bipolar and unipolar drives is unknown to me,
inasmuch as I don't know if the clock will run the bipolar motor at the
proper RPM. There is no feedback on the original stepper, and I don't
know if the antenna board might be able to 'goose' the clock if it sees
less or more than 32 RPM from the heading sensor on the antenna (hall
sensor that triggers once per revolution).
If not:
I will need to implement a micro controller board to use the clock as
input for enable only, and output the correct clock for the aux stepper
board.
I will need help with this.
I managed to blow up the ST200 board because I fabricated a heatsink
that was connected to both the L298 and 5V reg tabs. Blew the L298.
While I wait for a replacement IC, I'm stewing on this.
Ideas? Opinions?
JR
Project overview:
Converting JRC 1800CP Marine Radar 18" radome to open array configuration.
http://www.jrcamerica.com/product.asp?Product_Id=17531&d_Id=5607&l1=5600&l2=5607#
I had to upgrade the tiny unipole stepper drive for the antenna to a
much more robust bipolar motor with an aux 2 amp driver board.
http://www.tecel.com/st200/
The antenna board has an onboard driver clocked to turn the antenna at
32 RPM. I'm using the clock input to this driver to drive the aux driver
board.
However....
The difference between bipolar and unipolar drives is unknown to me,
inasmuch as I don't know if the clock will run the bipolar motor at the
proper RPM. There is no feedback on the original stepper, and I don't
know if the antenna board might be able to 'goose' the clock if it sees
less or more than 32 RPM from the heading sensor on the antenna (hall
sensor that triggers once per revolution).
If not:
I will need to implement a micro controller board to use the clock as
input for enable only, and output the correct clock for the aux stepper
board.
I will need help with this.
I managed to blow up the ST200 board because I fabricated a heatsink
that was connected to both the L298 and 5V reg tabs. Blew the L298.
While I wait for a replacement IC, I'm stewing on this.
Ideas? Opinions?
JR