FocusCube 2 (Universal)

Focus fast, reliable and accurate your telescope by using the “FocusCube 2“. 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 FocusCube has been developed to meet all of these requirements.

Designed in high quality with modern electronics, FocusCube can provide digital precise focus control from a PC. Device includes a stepper motor for absolute position focusing. Electronics and stepper motor are enclosed in a compact sized box. Do not be fooled by its size! This device can easily lift more than 6kg (212 ounces) of imaging equipment when the telescope points to the zenith!

This stepper motor is a high resolution geared stepper motor (Step Angle 7.5, Deg 120, Gear Ration 1:120). Its gearbox has very low backlash and high torque suitable to focus in micron scale! You only need this device to focus! Attach the FocusCube to your refractor / reflector / SCT telescope, plug the power, USB cable, download ASCOM drivers or standalone software and you are ready to go!

FocusCube is a standalone device and includes controller functionality. 
No physical hand controller is included or required.
DO NOT pair it with the Dual Motor Focus Controller or any other controller in the market.
DO NOT connect this RJ45 port to the Ultimate Powerbox RJ45 Stepper Output
The RJ45 port at the back is only for the hand controller or the included temperature sensor.

High torque & resolution stepper motor

Embedded unipolar stepper motor has a powerful and very low backlash gearbox. Motor Step Angle is 7.5 deg but the 1:120 reduction gearbox turns the reduction rate to 0.06255 deg / step. As firmware implements half step drive, the motor can execute twice the steps per cycle. This means 11510 steps per cycle!
Bottom line: You can focus in microns, easily and with great accuracy.

Motor can lift up to 6Kg of equipment (212 ounces) of imaging equipment when the telescope points at the zenith!

Universal Bracket

We have redesigned the L shaped bracket to easily fit onto mosts focusers in the market.
The lower part of the redesigned bracket can be replaced with a slimmer rail (included) for better compatibility with Newtonian and other low profile focuser.

This L shaped black anodised aluminium bracket, hard to bend, has cut rails and can be attached to a wide range of focusers.
In fact we have successfully installed it on:

Universal L Bracket (2022) – (All above parts are included in package)

We have succesfully installed the Universal L bracket to the following focusers

Bellow photos show how to attach the motor on a Baader Steeltrack Focuser

Remove the plastic grub-screws (the do not have an actual usage) from the bottom of the Steeltrack Focuser.

Align the L shape bracket with the focuser and use the supplied screws, spacers to attach the L shape bracket as shown below.

We have successfully installed our motor on:

  • Explore Scientific ED Series (ED80, ED102, ED127, ED152)
  • Explore Scientific ED-FCD100 Series (ED80-FCD100,  ED102-FCD100,  ED127-FCD100)
  • Explore Scientific FPL53 (ED140, ED115)

We have successfully installed our motor to:
Skywatcher Esprit Series (80 ED, 100ED, 120ED, 150ED).

Locate the set screw pointed with red arrow at below photo. Use a hex key tool to remove this set screw.

Remove the coarse knob

Use the supplied 5 to 6mm motor coupler and attach it to the focuser’s shaft.
Pass through your hex key tool into the small hole (pointed with red arow) and securely tighten the set screw of the motor coupler.

Turn using your hand the focuser knob to reveal the 2nd set screw of the coupler. Make sure to tighten both set screws very well.

Remove the two outer bolts using the hex key tool (check below photo).
You do not need these screws anymore. Keep them in a safe place.

Please note that the thumb screw of the finder holder collides with the motor L shape bracket so there are two options to avoid this.
a) Rotate the finder holder 180 degrees, as displayed below.

b) Detach and place the finder holder on the opposite side where there is a hidden screw thread under the label (as shown in the image below)

Place the motor on the bracket and align the motor shaft to the “already placed” motor coupler. Secure the motor with the bracket by tightening all 4 bolts.

Be sure to have the set screws of the motor coupler on top. This is required to allow you to have access to them by using the hex key tool. Do not tighten the coupler set screws of the motor side yet!

Use the longer supplied screws (M4x30mm) and spacers and use them to attach the L bracket on the focuser. Place these screws into the 3rd slot from the left of the bracket (check the photo below)

Do not fully tighten them yet!

Push the motor close to the telescope (as displayed below).

Tighten all set scews of the motor coupler

Please note that the brake clutch should not be used. Motor has a powerful gearbox which acts as a brake when motor is not rotating.

Tighten both large screws under your focuser

You are ready to focus!

We have installed the motor to all Starlight Feathertouch Focuser Series (from 2” to 3.5”).
Installation is very easy and the supplied bolts and spacers ensures that motor is securely attached on the focuser

Below photos are from a TEC140 with a 3.5” Starlight Focuser

Stellarvue 2″ focusers has a nice flat surface underneath. It is very easy to place the L shape bracket by removing the brake thumbscrew and use that thread to grab the bracket. One screw /washer is enough to hold the bracket in place. Motor has a powerful gearbox which acts as a brake so you will never need to engage this brake thumbscrew.

We have succesfully instaleld our L shaped bracken on these Takahashi Focusers.

  • Remove both knobs
  • Remove the central bolt (the bolt on top of the focuser as shown at the image below)
  • Use the 8mm motor coupler and attach it to the shaft of the focuser.
  • Securely tight the two set screws of the motor coupler (on focuser’s side)
  • Assemble the motor with the bracket but do not fully tight the 4 screws yet.
  • Make sure that the motor can slide on the rails of the bracket
  • Place the bracket on the telescope focuser and adjust (up or down) the motor to alligh the shaft with the motor coupler bore.

Use 1xM4 screw along with a washer to secure in place the L bracket.

It should look like the image below

  • Now securely tight the 4 x allen silver screws of the motor
  • Make sure to tighten the 2 set screws of the motor coupler (motor side)

You are ready to focus.

Below photos display how you can attach the motor to a Takahashi FSQ Focuser.

As the Takahashi Focuser has a flat surface it is very easy to use the long screws (supplied in the package) and replace two of the the stock Takahashi screws with these two in order to grab the motor onto the focuser.

* Please check below photos on how to attach the motor to a William Optics GT71 or a W.O. with a similar focuser

  • Remove the brake thumbscrew pointed with red arrow
  • Remove the coarse knob
  • Align the bracket (place the 6th slot of the bracket on top of the brake hole) and use a bolt and a spacer to secure it in place (you will find different sizes of bolts/spacers in the box)
  • Use the appropriate motor coupler from the 6 x motor coupler bag and connect motor shaft with focuser’s shaft. Make sure to tighten all coupler grub-screws.

Our optional Lens Kit (pulley and large size timing belt) allows the adaptation of our motor to a WO RedCat

Temperature Probe

An external digital temperature sensor input is located near the motor connector. A digital probe of one meter (3 feet) 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 is always included)

Expansion Port / Manual Focus (optional accessory)

FocusCube includes an expansion RJ45 port at the back of the enclosure.  This port provides input for the temperature sensor. An optional hand controller for manual focus control can be acquired for those who might want to add this functionality.

Please Notice: Hand Controller is an optional accessory

ASCOM supported

The controller is fully compatible with latest ASCOM 6.4


Autofocus via N.I.N.A
Autofocus via SGPro

INDI (Open Astronomy Instrumentation) supported

Pegasus Focuscube is fully compatible with INDI. Driver is included in stable libindi.
Official Indi Driver :

Standalone program supported

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

All required cables are included

  • A 1.8m USB Type B cable
  • A 1.5m Cigarette lighter adapter power cable

Six solid motor couplers are included

Six solid, different bore size, motor couplers are provided so you can select the coupler that fits to your focuser’s shaft. Choose between 3mm to 8mm couplers. All of them are included in the “Universal” package.

Firmware upgrade support

Controller firmware supports re-programming via the USB 2.0 (Only available for Windows) 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.

Compact size

56 x 63 x 39 mm / Weight 280g

In the box

FocusCube v2
Two brackets (wide and narrow size)
Temperature Sensor (0.6m)
USB type B Cable (1.8m)
Cigarette Lighter Adapter (3A fused)
Six different motor couplers (bore diameter from 3mm to 8mm)
Four M3x6mm length screws (to attach the enclosure on the bracket)
Different sizes (Pairs of M3x10, M4x10, M4x30 M5x10, M6x10, ) of metric screws and washers

Confused? What you can choose:

Bracket(s) Mechanical Design

Universal Bracket & Newtonial Bracket (Both included in package)

Technical Specifications

Supply Voltage12V – 13.8V DC
Current0.6 Amp
Motor CompatibilityStepper Motor is inside the enclosure
Motor OutputNone
(Stepper Motor inside in the enclosure)
USB ConnectivityUSB 2.0 Type B plug
Thermal Sensor Resolution9-bit Celsius temperature measurements
Power Input Connector2.1mm Centre Positive Socket
Motor SpecsHigh resolution geared stepper motor
(Step Angle (Deg) 7.5 / 120

(Gearbox reduction rate = 0.06255 Deg).
5755 steps per circle of rotation.
about 1 micron per step
* Firmware implements half step drive so one motor cycle is 5755 x 2 = 11510 steps
Very low backlash (about 30 steps in half step drive)
Dimensions56 mm x 63 mm x 39 mm
Operating Temperature-40 °C to +80 °C

An ED65 refractor example with the FocusCube v2, Falcon Rotator and Scops OAG