Rigel usb-nSTEP User manual

usb-nSTEP MAC Instructions
Copyright Rigel Systems 2010 Page 1of 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/stepper+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: The 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

usb-nSTEP MAC Instructions
Copyright Rigel Systems 2010 Page 2of 2 www.rigelsys.com
Temperature Compensation
This function runs the temperature internally to the nSTEP so a
user can actually configure it and then exit the ASCOM driver,
the nSTEP will keep on 'auto' compensating.
This internal temperature compensation is -not-controlled by
the higher level ASCOM API for temperature compensation, the
higher level API uses the temp comp of the ASCOM driver. The
internal compensation should not be used if the higher level
API's are used.
Temp Change:
This is the temperature change x10 to trigger a compensation.
The nSTEP uses a fixed point value here which is 10X the real
temperature change desired. Examples: -005 = move in "-"
direction when temp changes by 0.5C, +015 = +1.5C change
must be detected before triggering a compensation. The values
can range from -100 (-10.0C) to +100(+10.0C) in increments of
5(0.5C). The sign signifies whether to move + or -steps on a
change.
Temp move:
Move this many steps for each Delta Temp change. Direction of
movement controlled by sign of DeltaTemp
Temp Blash:
Apply this number of steps in last move direction before
reversing direction. Range 0 through 100 with 0 = no backlash
takeup
Temp Timer:
Temperature will be averaged over this number of seconds.
Range 1 to 75 seconds. Set to a lower value for more
immediate changes. A lower value may cause 'hunting' if the
sensor is detecting a value that is just toggling slightly (e.g. from
17.5C to 18.0C to 17.5C).
TC Off
Internal compensation turned off.
TC Manual
Temperature compensation done once on demand. Mutually
exclusive with the ASCOM drivers temperature compensation.
TC Auto
Internal compensation runs all the time. Mutually exclusive with
the ASCOM drivers temperature compensation.
TC Prime
Must press 'Prime for Manual' then 'SaveT' to set the device's
current temperature and position so it knows where to start
from. After that, press SaveT while 'Manual' is set to force a
compensation at the current temperature. Useful for focusers
with backlash when you do not want compensation running in
the middle of an exposure as taking up the backlash will throw
image out of focus even more if direction of motion reverses.
5 Year limited warranty: Rigel Systems, 26850 Basswood
Ave, Rancho Palos Verdes CA, 90275 warrants to the
original consumer purchaser of its product that the product will
be free of defects in material or workmanship 5 years from the
date of purchase under normal use. During this warranty
period, Rigel Systems will, at its option, repair or replace the
product without charge for parts or labor when delivered to
Rigel Systems with proof of the date of purchase and a
statement of the problem with the product. Shipping and
handling charges to Rigel Systems are your responsibility.
This warranty does not apply if the product has been altered or
repaired by anyone other than Rigel Systems or has been
subjected to purchaser abuse, accident, negligence or damage
subsequent to purchase including battery damage to product.
This warranty excludes incidental or consequential damages
resulting from the product or use of the product. The product
is not a toy. Keep away from children.
For more information visit http://www.rigelsys.com