I thought the idea was to get the CAv3 so that you could program the throttle modulation. Grin also sells different kinds of throttles.
The Cycle Analyst V3 is Grin's all-in-one ebike display and control console: track volts, amps, speed and range, and add PAS, torque sensing, and power limits.
ebikes.ca
The Cycle Analyst sends the Throttle OUT signal (ThO) to the motor controller via the CA-DP connector. It can be set up as either a variable voltage signal for ebike controllers or as a digital 1-2mS pulse for RC controllers. The min to max output range should be adjusted to correspond to the throttle input range of the controller to ensure the controller is driven to max at full operator throttle and is completely OFF when the operator throttle is closed.
Ramping options can help achieve smooth power engagement and remove the aggressive edge from powerful motor systems. When Up, Down, Fast, or PAS rate limiting are in effect a small {U,D,F,P} flag appears before the OUT voltage on the Diagnostic Screen to assist in tuning these settings.
[ ThrO->Outpt Mode ]
Selects between a steady analog voltage output on the CA Throttle Output line or a 1-2ms RC servo style pulse output. Almost all ebike and EV controllers operate off a voltage throttle signal, while the R/C pulse mode enables the CA to control compact ESCs from the hobby industry.
[ ThrO->Min Out ]
This is the voltage or pulse width sent to the controller for ZERO rider throttle. It should be about 0.2V below the actual voltage where the motor controller starts to respond. The default value of 1.0V is fine for most setups, but if the controller does not start turning the motor until 1.4 or 1.5V from the CA, then the Min Out setting could be increased to ~1.2-1.3V for a faster throttle response with less deadband.
[ ThrO-> Max Out ]
This is the voltage or pulse width sent to the controller for FULL rider throttle. Most ebike controllers will achieve full output between 3.5 to 3.9V on the throttle, and the CA3's Max Out should be at least 0.1V higher than this to achieve full power.
NOTE: Many controllers have a throttle overvoltage fault similar to ThrI->FaultThrsh. The CA3's Max Out must be lower than this controller fault or the controller will shut off at full throttle.
[ ThrO->Down Rate ]
Determines the maximum rate at which the throttle output can ramp downwards. For safety reasons you would generally leave this at a high value so that the system can shut off promptly, but there can be times where a slower disengagement of motor power is preferred. Values of 4 to 8 V/sec are recommended. Ebrakes cut power immediately and are unaffected by this setting.
[ ThrO->Up Rate ]*
Determines the maximum rate at which the throttle output can ramp upwards once current greater than FastThrsh is detected. This setting is popular for smoothing out the harsh kick on powerful systems. A lower value in V/sec will result in a longer time for the throttle to ramp up and results in a more gentle application of power. Values of 0.5 to 3 V/sec are recommended.
[ ThrO->PAS Rate ]
Determines the maximum rate at which the throttle output can ramp upwards when engaging in PAS mode. This can be used to achieve a smooth PAS power application while still allowing for a fast response with the throttle. Operation is otherwise as with UpRate.
[ ThrO->Fast Rate ]
Determines the maximum rate at which the throttle output can ramp upwards when controller current is less than FastThrsh. When current reaches FastThrsh, the rate becomes governed by UpRate or PASRate. This dual rate approach allows the Throttle output to quickly reach a level that starts having a measurable effect on the motor before then dropping to the normal Up or PAS rate limit. This eliminates time lag for a ramped throttle output to catch up with the bike when you apply the throttle and are already moving. Values of 3-8 V/sec are recommended for controllers that have an immediate response. For controllers with built-in ramping (such as eZee), or sensorless controllers that have a startup routine delay, a lower FastRate rate may be required to prevent overshoot.
[ ThrO->Fast Thrsh ]
Determines the threshold controller current at which the CA's output ramp switches from FastRate to UpRate or PASRate. This setting should be quite low for direct drive hub motors, such as 1-2A. However, for gear motors or mid-drives, the setting should be a bit higher than the no-load current required to accelerate the motor from stopped, typically 2 to 4 Amps. A value of 0A disables FastRate so only UpRate or PASRate is applied.
