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Remember the tz85s have a braking function which is quite violent. It will be harsher on the motor.
Have you tried fiddling with the electronize's PWM dial? You can set it to have relatively poor control but good torque (fewer, but bigger pulses) or to have finer control but less grunt. Night help a bit regardless of motor setup.
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Aside from that, is the 7:1 reduction the total reduction? If so, that sounds like very little to me, low revving motor or not. Tormenta 2 uses a motor of comparable grunt (albeit faster, but the point stands) for the weapon, that is overvolted and at around 100:1 - something like 100rpm on the weapon shaft - and it's plenty fast enough to throw itself and other machines. For an elec axe of this sort of scale I wouldn't try to gear for faster than 200rpm, it's not really needed and power is wasted in making theoretically faster swinging axes actually run slower because of strain.
Jamie's Onyx was originally powered by a drill motor with a 5:1 chain reduction to the axe. Under load that's probably only a tad faster than 100rpm. But it didn't lack power or look slow: https://www.youtube.com/watch?v=WOSJBug1Y7I
Same goes with another roboteer's similar setup: https://www.youtube.com/watch?v=jn4wnMjGVuw
Neither of these setups were particularly reliable because drill gearboxes can't handle the loads, but the idea is that both of these are geared way way way slower than most elec axes (and both use relatively puny motors) yet don't lack apparent power.
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I don't know what can be done for your setup in time for the champs, but I'm pretty sure you just need a lot more reduction. A 3kg axe is a hefty thing to get swinging regardless of motor. My only thought is an additional stage built from scratch as you mentioned above, or there may be merit in mating the motor you have to a large drill gearbox from a name brand. You can get such things for next to nothing from all over the place. People just throw them out in bulk as the batteries die, or as they upgrade to the new lithium based drills.
Hope you can resolve it, either way.
Have you tried fiddling with the electronize's PWM dial? You can set it to have relatively poor control but good torque (fewer, but bigger pulses) or to have finer control but less grunt. Night help a bit regardless of motor setup.
--
Aside from that, is the 7:1 reduction the total reduction? If so, that sounds like very little to me, low revving motor or not. Tormenta 2 uses a motor of comparable grunt (albeit faster, but the point stands) for the weapon, that is overvolted and at around 100:1 - something like 100rpm on the weapon shaft - and it's plenty fast enough to throw itself and other machines. For an elec axe of this sort of scale I wouldn't try to gear for faster than 200rpm, it's not really needed and power is wasted in making theoretically faster swinging axes actually run slower because of strain.
Jamie's Onyx was originally powered by a drill motor with a 5:1 chain reduction to the axe. Under load that's probably only a tad faster than 100rpm. But it didn't lack power or look slow: https://www.youtube.com/watch?v=WOSJBug1Y7I
Same goes with another roboteer's similar setup: https://www.youtube.com/watch?v=jn4wnMjGVuw
Neither of these setups were particularly reliable because drill gearboxes can't handle the loads, but the idea is that both of these are geared way way way slower than most elec axes (and both use relatively puny motors) yet don't lack apparent power.
--
I don't know what can be done for your setup in time for the champs, but I'm pretty sure you just need a lot more reduction. A 3kg axe is a hefty thing to get swinging regardless of motor. My only thought is an additional stage built from scratch as you mentioned above, or there may be merit in mating the motor you have to a large drill gearbox from a name brand. You can get such things for next to nothing from all over the place. People just throw them out in bulk as the batteries die, or as they upgrade to the new lithium based drills.
Hope you can resolve it, either way.
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