Sim Pedals Ultimate – Product Manual

Installing the electronics

Each pedal needs to be connected to the USB-controller which is included with your pedal set. Every pedal has a wire with an RJ-plug at the end. Each RJ-plug needs to be inserted in the USB-controller. Any pedal can be inserted in any RJ-jack of the controller.

After connecting the pedals to the controller, you can hook up the controller using the included USB-cable. Windows will recognize an axis for each of the pedals, your Sim Pedals are now ready for calibration. The USB-controller also offers connectivity options for another 4 axis and 12 buttons in case you want to hook up additional buttons or rotary dials.

Your shipment also contains a small grounding wire. The grounding wire may be useful if you use a Direct Drive-based steering wheel (such as the AccuForce or OSW). In some circumstances these type of wheels cause interference to other electronics, which shows itself as a small jitter on the pedal output.

If this happens, you can connect the molex-connector side of the cable to one of the grounding pins of the controller. The other side can be connected to one of the bolts of the brake pedal. This should stabilize the signal.

• If you have an early-spec pedal set without RJ connectors and with screw terminals on the controller, please see the electronics installation instructions here.

Calibrating the pedals

In order to calibrate the pedals for Windows we recommend using DIView Calibration Software (ZIP). Please see the video below for a detailed instruction on how to calibrate the Sim Pedals using DIView. This calibration method will work for all software which uses the standard Windows calibration protocol, such as rFactor. Note that iRacing uses a proprietary calibration method.

The pedals use soft stops at the end of the pedal travel. When calibrating the throttle, make sure you don’t press the pedal arm ‘into’ this soft end stop when determining your maximum calibration value. This means that you need to press it ‘into’ the soft stop when racing as well in order to reach 100% pedal output.

The throttle should be calibrated to a value at which it is about to hit the end stop (so you create a very small deadzone at the end). This ensures your pedal out will be 100% right at the moment you hit the soft end stop.

• A note on V2 16bit controllers: Your pedal set may have come with a V2 16bit controller. The range on each axis runs from 0-65536 (as opposed to 0-4096 on a 12 bit controller). Due to the very high sensitivity of these controllers, you will see fluctuations on the 5th and maybe 4th digit of the RAW number values.

When setting the calibration values, you should be able to get a good reading on the 4th digit. We advise to set the fifth digit to 0 if you can’t get a clear reading. The calibration procedure for a 16bit controller is, apart form the higher board resolution and thus the higher/larger numbers, identical to that of a 12bit board.

Calibrating the pedals – a note on 2-pedal sets

If you are not using a clutch pedal, there will be one empty RJ-port on the USB-controller. You can calibrate this port in DiView to a value of MIN 4095, CENTER 4095 and MAX 4095 to eliminate any signal noise from this empty port (or 65536 on a V2 16 bit board).

Calibrating the Pedals – iRacing

iRacing is using a proprietary calibration method. Calibrating within DIView will have no effect on the functioning of your Sim Pedals in iRacing. When in iRacing, go to Options and then to Drive to access the calibration screen. The calibration wizard will start when you hit the Pedals button in the top right corner. Since your Sim Pedals are using a load cell, also make sure to set the Force Factor to zero (under Brakes in the top right corner).

The pedals use soft stops at the end of the pedal travel. When calibrating the throttle, make sure you don’t press the pedal arm ‘into’ this soft end stop when calibrating. This means you need to press it ‘into’ the soft stop when racing as well in order to reach 100% pedal output.

The throttle should be calibrated to the point where it is about to hit the end stop (so you create a very small deadzone at the end). This ensures your pedal out will be 100% right at the moment you hit the soft end stop.

Adjusting the pedals

In the first video below the adjustment options for the Sim Pedals Ultimate are demonstrated. In the second video we give a quick overview of the minimum and maximum pedal travel options and the minimum and maximum brake pedal force.

Adjusting the pedals – Further details on the brake pedal

The brake pedal comes with the following rubbers:

• – White: 1x40mm 1x32mm 2x25mm
  – Green: 1x40mm 1x32mm 2x25mm

You can use any combination of rubber, as long as they are of identical colours. It is mandatory to use metal washers at the beginning and end of your rubber stack, as well as in between individual rubbers if you use more than one rubber.

Any combination of white rubbers allow up to 80kg pedal force (measured at the footpad). The more rubbers you use, the softer (eg. more travel) the pedal will feel. All possible options are shown in the top graph (blue lines) in the image below. Using only one 25mm rubber will give you the force curve on the far left (stiffest setup), using a stack of one 40mm, one 32mm and one 25mm rubber will give you the force curve on the far right (softest setup).

Any combination of green rubbers allow up to 136kg pedal force (measured at the footpad). The more rubbers you use, the softer (eg. more travel) the pedal will feel. All possible options are shown in the bottom graph (red lines) in the image below. Using only one 25mm rubber will give you the force curve on the far left (stiffest setup), using a stack of one 40mm, one 32mm and one 25mm rubber will give you the force curve on the far right (softest setup).

Any excess space on the rod should be filled with black spacer rings.

Calculating the brake pedal force during calibration

Calibration wise, there are some tolerances on the load cell sensitivity and the amplification, so this isn’t down to 1kg accuracy. However, a good rule of thumb to calculate the pedal force is as follows:

• On a V1 12bit board, every kilo is about 25 RAW calibration steps. This means that the white rubbers can be safely calibrated up to about 80×25 = 2000 RAW value, and the green rubbers to 135*25 = 3375 RAW value.
• On a V2 16bit board, every kilo is about 400 RAW calibration steps. This means that the white rubbers can be safely calibrated up to about 80×400 = 32000 RAW value, and the green rubbers to 135*400 = 54000 RAW value.

Again, please make sure your pedals are installed to a very rigid base before attempting to reach these force values.

Maintenance tips

Maintenance tips for the Sim Pedals Ultimate can be found here.