Q&A Forum
Hi all.
First post, so be gentle.
I've got a sunroadamatic xi/1 that I'm (attempting) to convert to yourdyno control.
The unit is disassembled, so I'm struggling to identify the control wire for the power supply. (where I would hook the yourdyno 0-5v control wire)
I've had the unit powered up, and have sat with a multimeter probing from neutral to all terminals and from Earth to all terminals to try and identify the signal input (looking for anything under 10v as I'm not sure if it's 0-5 or 0-10)
While probing each, I moved the "speed kph" knob on the hand controller.
I could not find any direct change in voltage that was directly related to the change on the hand controller.
My thoughts were-
Is there no control change for the brake as the unit is not receiving a load cell and trigger wheel signal as well as the hand controller?
Or am I missing something else too.
Terminal block in question
Https://photos.app.goo.gl/TAai9cBY9Hm7b8ka7
Power supply as a whole
https://photos.app.goo.gl/ht3H7Pgna7g5xEfM6
Control/readout unit
https://photos.app.goo.gl/3hFMj7fELw2UsEfc6
Model details
Hi and welcome!
What you need to do is either to turn on the brake manually, some systems have this capability (for example set brake to 50%). But some systems do not let you do that unless the rollers are moving (heat concern if left on for a long time). Or more straight forward: Set the Speed set point to say 30km/h and have an assistant run car faster than that. The brakes will then start to turn on and you can probe.
Looking at the board, it will likely be a signal that goes into the small control board in the middle, maybe the black one going from the terminal block.
If you cannot get it to work, you can buy a new power supply from JDM Dyno for £400. Contact Jonathan Mitchelson, jdmdyno@aol.com. It is plug and play with YourDyno. Make sure to know the max voltage in case it is lower than 192V. You can limit the output from YourDyno to for example 0-2.5V and you will get 0-96V out if that is what your brake needs.