Romer Optics Limited Company

02/19/2025

The New Power Hub for Ez Goto system

The Ez goto power hub is included in the new ez goto completed kit from now on.
The power hub is not for sale ! Previous buyers can pay the actual USPS tracking postage ($6) to request the "free" power hub once at
https://romer-optics-llc.myshopify.com/collections/coma-fee-dobsonian/products/ez-goto-power-hub

User Instruction is at
https://cdn.shopify.com/s/files/1/1023/8189/files/The_Easy_solution_to_manage_the_Power_Sources_in_Ez_Goto_V3.pdf?v=1740085687

09/09/2024

Romer Optics LLC is pleased to announce Project Luminosity.

Kristofer Sanders, in collaboration with Romer Optics LLC, has launched Project Luminosity in honor of John Dobson and of Tiago and friends at Dobsonian Power for their work and inspiration provided to the amateur astronomers community.

Through Project Luminosity EZ GOTO users can hope for:

1. Full ASCOM Compliance
2. Full remote control
3. Full automation
4. Push button alignment
5. Auto Recenter After Drift

To name a few…. Project Luminosity also has hopes to announce more new and exciting capabilities in addition to these upon release, like Pure Software Auto Guiding.

This project has been undertaken in an effort to give back to the amateur astronomy community.

06/28/2024

Wiring Test of Ez Goto out of the box

Before installation of ez goto on your Dobsonian, you should try the wiring test out of the box first. Contact us if any issues.

You need a 20 DCV power supply with standard DC plug to do the following test.

The clip shows how to
1. review the electric parts to do wiring test
2. wiring step byu step
3. motor learning via Bluetooth

The clip shows how to 1. review the electric parts to do wiring test 2. wiring step by step 3. motors learning via Bluetooth

06/26/2024

The latest Ez Goto App Demo

1. Offset encoders by a bright star2. Motors learning3. Goto a target4. Micro Motion5. Electric Focuser6. Push To M457. Offset encoders again by M45

02/03/2024

The update of the Ez GoTo controller on Windows free Stellarium

1. Fix the issue of the lost command sent from laptop’s Bluetooth :
We let the communication more reliable when using Bluetooth. The app sends commands again and again without any response. It happens when the BT signal is too weak or the antenna is blocked somewhere. Basically, the wired USB is always more reliable than Bluetooth. In the update, we try to sends commands several times in case.

2. The bug in motor learning when encoder passes zero :
We found the big problem when the encoders pass 0/4096 (0 to 360 degree). The Alt motor learning goes wrong because of the mistaken angle calculation. We did not find the bug becuase only using very limited range between +-90 degree in altitude. Luckily, we have fixed it and done a lot suspicious tests in the app.

3. The improvement of the motor learning :
In our stepper motor settings, goto motor speed is 4x faster (1/64 micro stepper). For example, the goto motor move forward 1024 steps first, and let the tracking motor go back 4096 steps. By the way, the DOB not only goes back to origin and let the tracking more accurate.

3. The app restores the results of the previous motors learning. It save much time if you choose a big number of steps.

4. The layout and color of the control panels make app more efficient, good looking and less space on the screen.

Ez GoTo Controller 2024 for Windows Stellarium.
The software of Ez GoTo plugin is available at
https://cdn.shopify.com/s/files/1/1023/8189/files/EZ_GOTO_kit_for_Stellarium_v3.rar?v=1707797230

However, we need more time to update the manual and take a demo clip.

01/31/2024

Wire the eZ GoTo system by 9 steps.

The detailed PDF is at
https://cdn.shopify.com/s/files/1/1023/8189/files/The_manual_to_wire_the_Ez_GOTO.pdf?v=1706659123

You can wire them in few minutes out of box.
All wires are protected by one-way diode and fool-proof connectors to avoid any mistaken +/-.

11/08/2023

EZ GOTO ( complete kit ) is ready for sale

https://romer-optics-llc.myshopify.com/collections/coma-fee-dobsonian/products/ez-goto-complete-kit
----------------------------------------------------------------------
SPECIFICATIONS :
Resoltion : AZ/ALT encoder is 0.087° (12 bits)
TRACKING 0.0004°/sec ( roughly 1/10 sidereal rate)
GOTO 0.002° ( roughly 1/2 sidereal rate), 500X slew rate

Platform : AZ-ALT / Horseshoe EQ mount
Motor Control System : Encoder Feedback

Operation : GOTO / PUSH TO fusion
Software : Android app (Ez Goto) / Windows Stellarium

Communication : Bluetooth / USB

Power Consumption : about 20W~30W (12"~16" Dobsonian or larger telescopes)

Features : Push To / Goto / Electric Focuser / Micro motion

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We will help the buyer to make connectors, label the wires and test the goto system (take a clip if requested) before packing them.

The buyer can wire and play them directly in few minutes out of the box if you have had a 20~24V DC power supply or a 12V battery with a DC-DC converter (contact us if you have any question).

We do our best to make wiring and power connected by the way of fool proof (such as fuse, diode, XH2.54 and PH2.0 connectors). However, the basic electric and mechanical knowledge are required in your goto project.

10/16/2023

Ez goto app is updated on 10/16/2023

https://cdn.shopify.com/s/files/1/1023/8189/files/ez_goto_api31.apk?v=1697480158

Please download the apk and install it manually

1. API 31 version to fit the Google policy on Android 12

2. Correct the bug in Alt motor learning when encoders pass 0/360 degree

3. Correct the label of menu "push to" to "Goto" in bright star list.

10/13/2023

Inspecting the installation to improve the encoder accuracy after long term use

We apply the contactless magnet encoder in our system. The encoder magnets are specially selected one by one. The magnet must be centered extremely precisely (less than 0.1mm) to perform as its specification. We manufacture every drilling hole by CNC matching the selected screw to make sure encoder aligned plate tightly and centered well. However, there is a very little gap left between holes and screws.

1. Inspect the edges of the aligned plate from a view angle.
The visual inspection could recognize a spacing of 0.05mm.

2. The borderline of the plate are supposed to match the back PCB visually.

3. Adjust the plates position by loose and tight the 3 screws if necessary.

02/03/2023

The Easy solution to manage the Power Sources in Ez Goto

The necessary power supply :
There is several power sources required to build the entire goto system.
1. 5~15 DCV: Ez goto / Dual Speeds Relay
2. 20~40 DCV : Ref. Voltage / Az / Alt / Focuser motor drivers

We proposed an easiest and “SAFE” all in one solution.
Read the PDF at
https://cdn.shopify.com/s/files/1/1023/8189/files/The_Easy_solution_to_manage_the_Power_Sources_in_Ez_Goto.pdf?v=1675461798