Mark's Trains, Unit 42, Workspace House, 28-29 Maxwell Road, Peterborough, PE2 7JE    01733 609 414

Chuff Rate Results

' . $_GET['time'] . ' seconds '; echo '
Chuffs per revolution selected = ' . $_GET['chuffs'] . ' chuffs '; echo ' Value for CV57 is ' . round($result) . ''; } else { echo 'Error: Failed to calculate! Input data is missing...'; } ?>

Here is the second part of the instructions.

6. Enter the value of CV57 provided by the calculation, <B>(CV57=<?php echo round($result); ?>)</B> to your locomotive decoder on your programming track.
7. Observe the locomotive running on speed step 1 with the engine sounds active. Make sure there is a chuff every 90 degrees of rotation giving a total of 4 chuffs per revolution.
8. If there are too many chuffs you may need to fine tune CV57 by gently increasing the value. If there are not enough chuffs try decreasing the calculated value of CV57.
9. Once you are satisfied with the chuff rate on speed step 1 it is time to look at the higher speeds. Increase the locomotive speed to speed step 4 and observe the chuff rate.
10. Allow the locomotive to get up to speed over several seconds, this will take in to account any inertia/momentum set. With CV58 set to the default value of 43 observe the chuff rate. If you are happy with the way it is chuffing then the calibration is complete. If not read on…
11. If you find there are too many chuffs at speed step 4, try increasing the value of CV58. If there are not enough chuffs decreasse the value of CV58.

This final part of the proceedure may take a little longer to fine tune, but with perseverance will provide perfect results.

To return to the chuff calculator please <a href=”https://www.marks-trains.co.uk/chuff-rate-calculator/”>click here.</a> To head back to the main home page <a href=”https://www.marks-trains.co.uk”>click here.</a>