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Astroasis Oasis Focuser User Manual

Clutch electronic focuser
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Suzhou Astroasis Vision Technology Co., Ltd.
Ver 2.1
Oasis Focuser
Clutch Electronic Focuser
User Manual
Version 2.1
2024.09.21
Suzhou Astroasis Vision Technology Co., Ltd.
https://www.astroasis.com
We dedicate to providing high quality products and services for amateurs of astronomical observation
and photograph

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Summary of Contents for Astroasis Oasis Focuser

  • Page 1 Suzhou Astroasis Vision Technology Co., Ltd. Ver 2.1 Oasis Focuser Clutch Electronic Focuser User Manual Version 2.1 2024.09.21 Suzhou Astroasis Vision Technology Co., Ltd. https://www.astroasis.com We dedicate to providing high quality products and services for amateurs of astronomical observation and photograph...

  • Page 2: Table Of Contents

    1.1. Features ................................2 1.2. Specifications ..............................3 2. Packing list ..................................5 2.1. Oasis Focuser first generation packing list .................... 5 2.2. Oasis Focuser Rose packing list ....................... 7 3. How the clutch works ..............................9 4. Hardware installation ..............................10 5.

  • Page 3: Product Introduction

    5、 Has two temperature sensors, one monitors board temperature, the other monitors ambient temperature 6、 Has beep generator for tips or alarms Since August 2024, we public and began to deliver the second generation of Oasis Focuser - Oasis Copyright 2024 Suzhou Astroasis Vision Technology, Inc. All Rights Reserved.

  • Page 4: Specifications

    Suzhou Astroasis Vision Technology Co., Ltd. Ver 2.1 Focuser Rose. Compared to the first generation Oasis Focuser, the Oasis Focuser Rose has the following improvements: 1、 Convenient power supply — It can be powered by either the USB Type-C port or the 12V DC port.
  • Page 5 USB Power Supply（5V） DC Power Supply（12V） Idle ~190mA ~62mA Motor running ~390mA ~260mA Heating on maximum allowed power ~510mA ~530mA Motor running and ~740mA ~730mA Heating on maximum allowed power Copyright 2024 Suzhou Astroasis Vision Technology, Inc. All Rights Reserved.

  • Page 6: Packing List

    Suzhou Astroasis Vision Technology Co., Ltd. Ver 2.1 2. Packing list 2.1. Oasis Focuser first generation packing list The components included in Oasis Focuser first generation suit are shown as Figure 2-1. Figure 2-1 Packing List Descriptions of each component are shown below. Name...
  • Page 7 Suzhou Astroasis Vision Technology Co., Ltd. Ver 2.1 monitor ambient temperature. USB 2.0 Cable 2-meter long USB 2.0 cable for data communication between Oasis focuser and computers. Copyright 2024 Suzhou Astroasis Vision Technology, Inc. All Rights Reserved.

  • Page 8: Oasis Focuser Rose Packing List

    Suzhou Astroasis Vision Technology Co., Ltd. Ver 2.1 2.2. Oasis Focuser Rose packing list The components included in Oasis Focuser Rose (second generation) suit are shown as Figure 2-2. Figure 2-2 Packing List Descriptions of each component are shown below.
  • Page 9 Suzhou Astroasis Vision Technology Co., Ltd. Ver 2.1 USB Type A-C cable for data communication between Oasis focuser USB Type A-C Cable and computers. It can also be used for power supply. Copyright 2024 Suzhou Astroasis Vision Technology, Inc. All Rights Reserved.

  • Page 10: How The Clutch Works

    The bigger gear is installed on telescope focuser small shaft, and the smaller gear is installed on the shaft of the Oasis focuser motor. The two gears can be meshed or not meshed by rotate Oasis focuser body. When gears are not meshed, the knob on the other side of telescope focuser can be used to do manually focus.

  • Page 11: Hardware Installation

    Suzhou Astroasis Vision Technology Co., Ltd. Ver 2.1 4. Hardware installation To install Oasis Focuser onto telescopes, please refer to the following document: Oasis_Focuser_Installation_Reference_Manual_EN.pdf This document can be downloaded at the following address: https://www.astroasis.com/download/files/focuser/Oasis_Focuser_Installation_Reference_Manual_EN. Copyright 2024 Suzhou Astroasis Vision Technology, Inc. All Rights Reserved.

  • Page 12: Software Installation And Usage

    5.2. ASCOM driver installation Oasis focuser can be connected to a PC via a USB cable and is implemented as an HID device, which is automatically recognized on a Windows, Linux or macOS PC without the need to install device driver.
  • Page 13 3、 Switch Oasis focuser to "ON", i.e., the engaged state. In this state, the two gears are meshed together so that the telescope focuser can be driven when the motor is running.

  • Page 14: Stall Detection

    Ver 2.1 5.3. Stall detection Oasis Focuser Rose has stall detection feature. This feature prevents the telescope focuser and the gears from being damaged in case the telescope focuser moves out of the minimum or maximum range or in other cases that are not expected.
  • Page 15 Suzhou Astroasis Vision Technology Co., Ltd. Ver 2.1 Figure 5-5 Copyright 2024 Suzhou Astroasis Vision Technology, Inc. All Rights Reserved.

  • Page 16: Notes For Installation And Use

    1) The first method is to turn the knob at the other side of the focuser slightly by one hand, while turning the Oasis focuser too by another hand, so that the two gears will have chance to mesh perfectly. Please refer to the clip from the following video starting at 5:12.
  • Page 17 Suzhou Astroasis Vision Technology Co., Ltd. Ver 2.1 Figure 6-2 Copyright 2024 Suzhou Astroasis Vision Technology, Inc. All Rights Reserved.

  • Page 18: Position And Steps Measurement

    Ver 2.1 7. Position and steps measurement Oasis focuser uses a motor that has a large reduction ratio. To implement the clutch function, it uses two gears to driver telescope focuser. The gears have different number of teeth which also increases the reduction ratio.

  • Page 19: Backlash Measurement

    1、 Open the Oasis focuser setup dialog in an application that supports ASCOM interface 2、 As Oasis focuser firmware itself has backlash compensation feature too, you need to disable this feature first before measuring backlash. To disable backlash compensation feature in firmware,...
  • Page 20 The backlash measured on SkyRover 102 APO Pro is around 300-400 steps and on Sharpstar 107PH it’s around 250 steps. Based on the results of Position and steps measurement, we can know the Copyright 2024 Suzhou Astroasis Vision Technology, Inc. All Rights Reserved.
  • Page 21 Measuring backlash by looking at the knob can also be used to quickly determine if the gears are meshed properly. If the backlash is significantly higher than expected, please try to rotate the Oasis focuser body again to mesh the gears properly. Copyright 2024 Suzhou Astroasis Vision Technology, Inc. All Rights Reserved.

  • Page 22: Auto-Focusing

    9. Auto-focusing Let's take NINA as an example to explain how to use Oasis Focuser for auto-focusing. Other software works in a similar way. Since the purpose of this chapter is only to explain how to use NINA for auto- focusing, the basic usage of NINA will not be described in detail here.
  • Page 23 Suzhou Astroasis Vision Technology Co., Ltd. Ver 2.1 Figure 9-2 The curve after focusing completed is shown as in Figure 9-3. Copyright 2024 Suzhou Astroasis Vision Technology, Inc. All Rights Reserved.
  • Page 24 Figure 9-4 shows the focus curve with the backlash compensation value set to 0. We can see that the actual backlash is about 400 steps. Copyright 2024 Suzhou Astroasis Vision Technology, Inc. All Rights Reserved.

  • Page 25: Notes About Auto-Focusing

    Initial position：The initial position needs to be close to the actual focus position. Backlash compensation：As mentioned above, setting the backlash compensation too small can cause the focus curve to appear horizontal line and fail to find focus position. Copyright 2024 Suzhou Astroasis Vision Technology, Inc. All Rights Reserved.

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