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I've encountered problem with my conversion. There are two bolts on the motor/gearbox adapter (2signals per revolution) as seen here.
I calculated the pulse width to be:
bolt head dia / (adapter dia * pi * rpm/60)
6-10mm /(200mm * π * 120hz) = ~ 79-132us. ( I don't know the precise diameter of the bolt head, I used 7200rpm as the max. value)
The controller wants the signal to be at least 200us. I used the Evnetics logger and it shows rpm up to 2300 and then void. (With 6mm bolt the pulse width is ~250us at that rpm.)
The "easy" solution would be to increase bolt head diameter. In my case, I would need to remove gearbox and motor. I just can't take the adapter/coupling away from between the two because there is so little space. And then take the adapter to a machinist who makes approbative changes. ..and balances the whole thing. Bolt head diameter should be at least 20mm so the pulse width would be around 260us.
So my question is, is there any other, preferably easier, way to increase pulse width? Electronically? Or could I wire the tach signal (from the Omron hall -sensor) directly to an external rpm gauge with shift light? And then use the shift light as a throttle limit via Solitons inputs? I don't need external rpm gauge, but working rpm limit is a cheap insurance.
I calculated the pulse width to be:
bolt head dia / (adapter dia * pi * rpm/60)
6-10mm /(200mm * π * 120hz) = ~ 79-132us. ( I don't know the precise diameter of the bolt head, I used 7200rpm as the max. value)
The controller wants the signal to be at least 200us. I used the Evnetics logger and it shows rpm up to 2300 and then void. (With 6mm bolt the pulse width is ~250us at that rpm.)
The "easy" solution would be to increase bolt head diameter. In my case, I would need to remove gearbox and motor. I just can't take the adapter/coupling away from between the two because there is so little space. And then take the adapter to a machinist who makes approbative changes. ..and balances the whole thing. Bolt head diameter should be at least 20mm so the pulse width would be around 260us.
So my question is, is there any other, preferably easier, way to increase pulse width? Electronically? Or could I wire the tach signal (from the Omron hall -sensor) directly to an external rpm gauge with shift light? And then use the shift light as a throttle limit via Solitons inputs? I don't need external rpm gauge, but working rpm limit is a cheap insurance.