Dual Motor Focus


Pegasus Astro Dual Motor Focus Controller v3
Focus fast, reliable and accurate your telescope using a stepper or DC motor and our controller.

Version3: Same features, more powerful motor outputs,  in a very compact size!

Hint: You can get the controller as a set with our Motor Focus Kit or Motor Focus Kit SCT

Dual Motor Focus brings a decade of experience in astrophotography and telescope focusing concepts. The evolution of technology in astronomy requires a system which will assist the focusing of the telescope with great accuracy. Fast optics and modern camera devices require automatic focusing in every small period of time as temperature can affect focal length and modify the optimal focus position. Pegasus Dual Motor Focus Controller (DMFC) has been developed to meet these requirements.

Hint: Read a Review by AstroBackyard

Dual mode

The Dual Motor Focus Controller supports two kind of motor types.

  • High Resolution Stepper motors (unipolar and bipolar) for absolute position focusing.
  • DC motors by its Pulse Width Modulation duty cycle control.

Controller can switch motor mode from its software, Mode can be instantly changed (with one mouse click) from ‘stepper’ to ‘dc’ motor and saved in controller’s EEPROM memory.

Manual and PC operation.

The controller can be operated by PC using its USB2 connectivity. A manual operation by utilising the digital encoder on the side of the controller simulates the knob of your real focuser. Turn the knob as it is the knob of your telescope’s focuser. If you press it, speed of the motor will be reduced to 1:10.

Dual Colour Indicator

A dual colour light emitted diode (Green / Yellow) is fitted on the side of the unit. Each colour indicates speed and the led can be turned on or off by its software during an observing session. Keep it pressed to disable the knob.

Robofocus compatible connector pin out

Motor output is fully compatible with “Robofocus ©” pin out. Output can drive most of the motors in the market. Take a look in our F.A.Q tab.

Temperature Probe

An external digital temperature sensor input is located near the motor connector. A digital probe of one (1) meter length is supplied. The probe can be placed near the focuser so the exact temperature of the focuser / environment can be seen through the supplied software or ASCOM driver (probe always included in package)

Backlash Compensation

Controller can compensate the backlash you might encounter in your system. Although our motor has very low backlash other setups might need this feature. Backlash compensation is supported from a function inside controller’s firmware.

ASCOM compliant

The controller is fully compatible with latest ASCOM 6 and can easily be controlled from a computer.

ascompegasus

INDI (Open Astronomy Instrumentation) compliant

Pegasus DMFC driver is included with libindi >= 1.5.1
Official Indi Driver : http://indilib.org/devices/focusers/pegasus-dmfc.html

Standalone program support

The controller can be operated by the standalone DMFC software. (Only available for Windows OS)

dmfcv3

dmfc_2

Firmware upgrade support

Controller firmware supports re-programming via the USB 2.0 connection using upgrade software, for future upgrades which may become available. We constantly receive feedback from our customers and keep updating the firmware and software with new features.

Two Years warranty

Warranty covers the controller device including the temperature sensor.

(The photos bellow show the older model with the DB9 connector)
dmfc_motor4
dmfc_motor3
Supply Voltage 12Volt DC (Can accept 5V for 5V motors)
Motor Compatibility DC motor – adjustable frequency PWM
Unipolar stepper motors
Bipolar stepper motors
Motor Output DC motor, max 1 Amp
Unipolar / stepper motors, max 2.0 Amps (1.0 Amps per phase)Continuous output current per channel: 1 A
Peak output current per channel: 3 A
Continuous paralleled output current: 2 A
USB Connectivity USB 2.0 Type B plug
Thermal Sensor Resolution 9-bit Celsius temperature measurements
Power Input Connector 2.1mm Centre Positive Socket
Motor Connector RJ45
Dimensions 66mm x 66mm x 28 mm

Pegasus Stepper Motor

Step Angle (Deg) 7.5 / 120  = 0.0625
Gear Ratio 1:120
Phases 4
Voltage 12
Current (A) 0.27
Pull-in Rate (PPS) 400
Pull-in Torque (N.cm) 60 (100pps)
Dual Motor Focus Controller
Temperature Sensor
USB type B Cable (1.8m)
Cigarette Lighter Adapter
Stepper Motor Cable

Hint: Premium Package includes the Dual Motor Focus Controller  + Motor Focus Kit

Unipolar Stepper Motors
Bipolar Stepper Motors
DC Motors
Manual Focus via Digital Knob
Temperature Sensor included
Backlash Compensation
Focuser Support Universal / Most Crayford, Rack n Pinion Focusers
SCT Support
Motor Focus SCT Kit is required
USB2 Connectivity
Standalone Program
Upgradable Firmware
ASCOM Compliant
INDI Compliant

Takahashi TSA120
Takahashi FS60
Skywatcher Esprit 120
Feathertouch Focuser on Refractor (TEC140)
Vixen VC200L
Altair Wave Series 115
Celestron SCT C 9.25
Celestron SCT Edge 9.25''
Celestron SCT C14
Orion ED80T

A comparison between “Dual Motor Focus Controller” and “FocusCube”

Q: In which focuser does it fit?

A: We have installed our universal L shaped metal adapter to the following focusers:

  • Orion Optics UK default focuser
  • GSO (RC focuser)
  • Takahashi (FSQ85, FSQ106)
  • Moonlite (2”, 2.5”)
  • Baader (Steel track)
  • Synta Focuser Refractors
  • Skywatcher Dual Speed 2″ Crayford 
  • Altair Astro (2”, 2.5”, 3”)
  • Starlight (2”, 2.5”, 3”)

Q: What kind of stepper motors does it support?

A: Bipolar and Unipolar Motors. Can deliver 1Amp per coil. 2Amps in total.

Q: Does it support Robofocus Motors?

A: Yes, You will need a RJ45 to DB9 Cable.

Q: Does it support Moonlite Motors?

A:Yes, You will need a RJ45 to DB9 Cable.

Q: Does it support Starlight Stepper  HSM20, 30, 35

A: Yes, controller fully supports these motors. You need a special cable as the pinout is different. Contact us for more details.

Q: Does it support Lakeside Motors?

A:Yes, You will need a RJ45 to DB9 Cable.

Q: Does it support Rigel Stepper Motors?

A: Yes, but you need a custom RJ12 to DB9 cable. Contact us for details to order one or check the Rigel pinout pdf in our support page

Q: Does it support Rigel DC Motors?

A. Yes, you need a Cable for DC pulse motors.

Q: Does it support Meade zero image shift focuser?

A: Yes, Meade zero image shift focuser has a DC motor. You will need a custom “mini Stereo -> DB9” cable. Contact us for details to order one

Q: Does it support JMI Motofocus?

A: Yes, Motofocus is a DC motor. DMFC fully supports these types of motors.  You have to include in your order the “Cable for DC pulse motors”

Q: Does it support 5V Stepper motors?

A: Yes, but you have to provide a 5-6V DC power supply to Pegasus DMFC controller (instead of 12V DC).

Q: Does it support Starlight Micro Touch Focus Motors?

A: Yes, Starlight motors are 5V motors. You need to do two things:

  • Supply a 5V DC power to Pegasus DMFC (instead of 12V DC)
  • Get a custom RJ12 -> DB9 cable to connect your motor. Contact us for details, We can provide one.

Q: Is Pegasus Stepper Motor efficient / strong enough to move the focuser under heavy load?

A: Absolutely. Its gearbox has a low backlash, high resolution (gearbox reduction is 1:120) so its torque is very high. We guarantee that you will never have a problem with that, period. Motor can move focuser with high weight imaging equipment when telescope points directly to zenith.

Q: I would like to use up to 6 meters of cable from my motor to the controller. Can I do that?

A. Yes, motor works perfectly fine.

Q: What about the motor coupler you provide. Only one size?

A:Coupler has 3 screws and can attach any shaft from 4mm to 8mm. These 3 screws ensure that you will securely lock (on axis) different shaft diameter.

Q: Where should I place the temperature sensor?

A: Just place it near the focuser. After some time telescope setup will equalise its temperature to temperature of the environment.

Q: Does it support ASCOM?

A: Of course! The controller is fully compatible with ASCOM v6. You can download the latest ASCOM driver from our support page

Q: Does it work with Sequence Generator Pro (SGP) /  MaximDL or TheSkyX?

A. Of course! It will work with any program that supports ASCOM v6.

Q: Does it support TheSky X2?

A: A 3rd party driver has been written. You can find it here: https://rti-zone.org/macosx_x2focuser_plugins.php

Q: Does it support Indi?

A: Yes. An Indilib driver is available -> http://indilib.org/devices/focusers/pegasus-dmfc.html
We have fully tested the DMFC controller in kstars / Ekos

Q:Can I use two controller with the same software?

A: Sure, Software can connect to two controllers in parallel.

Q:What about warranty?

A: All of our products are covered by two years of warranty

Motor kit Installation howto on different focusers


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