[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: (ET) Well, it took long enough
Denis Carrier wrote:
By the way, I bought the one before on eBay. I found it a bit small, not
very good as far as the ergonomics are concerned (hands too close
together so dangerous for kickbacks) and was surprised the find that the
oil for the chain is taken from the gears enclosure. What kind of oil
are you going to use (chain oil or sae 80 gear oil?)
Probably standard chain oil. If the gears share the oil system it would
probably be better to keep the chain assembly happy.
I agree with you,
we need a 36 Vdc chainsaw to work from an Elec-Trak. I tried before a
Remington (110Vac) with a 3400 watt inverter. Not enough! For inductive
loads (like an electric motor) I was told that we have to multiply by 6
the nominal wattage. As an exemple, a 12 Amp, 110 Vac chainsaw might be
seen as a 1320 Watt machine (Volts x amps = watts) but this is not the
case. I still would like to use a new 110Vac electric chainsaw with my
E20 but I have to find a way to avoid its peek power requirement at start.
It is a bear of a problem. I would guess that the tripp-lite 3600 watt
inverter *might* be enough to get the job done. I will say that a 3,000
watt APC Matrix UPS will do the job without a problem, however it's a 48
volt inverter so now you're dragging another 12 volts of batteries to
put in series with the Elec-trak. Big big pain in the rear.
Technically the rotary inverter should not need that multiplication
factor as it's a real spinning AC alternator. However when I use my very
nice Craftsman electric it will pop that 8 amp breaker after a minute or
two of cutting. Big pain in rear. I've thought about replacing the 8a
klixon with a 10 amp breaker, but I really don't want to burn out the
windings on my rotary and it seems to be a happy thing otherwise. Anyone
know if you can "overclock" that thing a bit?
I see 3 possibilities :
1- Add condensers
2- Use a small flywheel progressivly accelereting the rotor (via a CVT?)
3- Find an electric motor having a rotor with much less inertia and add
a centrifugal clutch like those on IC engine chainsaws.
Another option would be to get a broken AC genset in the 2,000 watt
range, junk the ICE motor, and hook it up to a nice big E15-E20 shunt
motor. Then trim the field current to get a nice stable 120 and let it
rip. One feature of the shunt wound motors is that if you set a specific
speed, they will do anything to maintain their RPM. So they would be
great for a genset.
If I don't like the chainsaw I'll re-sell it on Ebay then go this route.
Big pain though...