Mounting the IRIS Telemetry antenna differently

In a previous post I already wrote about the problem with the the default antenna mount position of IRIS. If you actually look carefully, you’ll notice three problems:

  • When flipping over IRIS during a crash landing you can easily damage the antenna and/or Telemetry module
  • You cannot un-/tighten the antenna without removing the top hull
  • The antenna is directly connected to the transmitter board, passing through any physical tension and stress from the antenna to the board

These problems are all solved in the IRIS+, as the antenna is now located towards the side of the top hull, points downwards and is connected to the transmitter board via a cable (See Figure 1).

Figure 1: 3DR IRIS+ with new Telemetry antenna location

Figure 1: 3DR IRIS+ with new Telemetry antenna location

Unfortunately the IRIS-to-IRIS+ upgrade kit does not provide the material to move the antenna location of your existing IRIS. In this post I will show you, how you can easily relocate your IRIS transmitter antenna and thereby fix at least two of the three problems very easily.

Required materials and tools

How-to assemble

After opening the top hull of IRIS, follow below steps to relocate your Telemetry module:

  • Unscrew the three small plastic screws that hold the Telemetry module onto the plastic spacers
  • Remove at least the rear plastic spacer
  • Tape a stripe of 3M Dual Lock on the bottom of the Telemetry module
  • Tape another stripe of 3M Dual Lock on the top shell, a little further to the back of where the Telemetry module used to be located (See Figure 2).
    Figure 2: Telemetry module attached with 3M Dual Lock

    Figure 2: Telemetry module attached with 3M Dual Lock

    Make sure that you place the 3M Dual Lock, so that with the Telemetry module attached the following is possible:

    • The locations is not too far to the right. You can still close the top hull.
    • The locations is sufficiently towards the back. You can point the antenna downwards and you can un-/tighten the antenna without removing the shell.
    • The Telemetry module does not touch the Pixhawk! This is very crucial, as you will otherwise introduce vibrations
  • Close the top shell again

As a result you will be able to point the Telemetry antenna downwards and also un-/tighten the antenna (See Figure 3).

Figure 3: Telemetry antenna pointing down on IRIS

Figure 3: Telemetry antenna pointing down on IRIS

In this position the antenna will block easy access to the battery door. For improved usability place a 90 degree angled RP-SMA adapter between the Telemetry module and the antenna, pointing the base of the antenna out to the right side.

 

Tagged with: ,