usb-nSTEP MAC Instructions
Copyright Rigel Systems 2010
Page 1 of 2
www.rigelsys.com
Hardware Connection
1)
Connect Stepper motor to usb-nSTEP using
supplied
VOICE
cable. Do
not
use DATA
cables.
VOICE
cables can be identified by
looking at the ends of the cable. Color of wires
are reversed comparing one end to the other.
2)
Connect usb-nSTEP to external 12V DC using
supplied power cable -- steppers will not work
without 12V DC connected
3)
Connect usb-nSTEP to MAC usb port using
supplied USB cable
4)
Optional temperature probe plugs into 2.5mm
jack next to usb socket on usb-nSTEP.
Installing the Software
1)
Go to
http://rigel.datacorner.com/rigelsys/mo
tor.html
2)
Click on Step (4)
3)
Download usb-nSTEP software for MAC
4)
Move from Download folder to applications or
desktop
5)
Ready to go
Control Window
Position
:
Where the driver thinks the focuser is. For nSTEP this is truly
always relative to a point you set in the Advanced screen.
In/Out:
Press to move in or out the number of “steps per second”
indicated by the 'sliders' setting.
Steps/Sec Slider
Select number of steps per second to do for each press of an
In/Out button
Temperature:
Displays the current temperature in degC for the temperature
probe is attached to the usb-nSTEP
Show Advanced
Displays the Advanced Setting
Show Temp
Displays the Internal Temperature Compensation Settings
Advanced Settings
Step Type
Wave
:
In this drive method only a single phase is activated at a
time and is smoother. It is smoother than full step drive, has the
same number of steps as the full step drive, but the motor will
have significantly less than rated torque.
Half
: T
he drive alternates between two phases on and a single
phase on. This increases the angular resolution, but the motor
also has less torque (approx 70%) at the half step position
(where only a single phase is on) compared to Full.
Full
:
This is the usual method for full step driving the motor. Two
phases are always on. The motor will have full rated torque.
Max Steps/Sec Slider
Sets upper limit on the Steps/Sec Slider
Phase Select
:
set to 0 for usb-nSTEP
.
Can be used for any possible combination of phase wirings.
Allow a person to wire the phases in any order then chose one
of 3 settings in software to drive them.
Zero Position
Press to set the current focuser position to zero.
Stored Positions
Lets user make change major elements with large differences in
focal plane easily by focusing once and then saving the position
with annotation for later 'GoTo' when this element is used
(camera1 to camera2 to eyepiece type '1' to eyepiece type '2').
Save
Saves the current position
Goto
Moves the focuser to the saved position
