More^×2U
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Posts posted by More^×2U
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26 minutes ago, OldDominionDIYer said:
My understanding is that FlexVolt utilizes 20700. Have they produced anything in 21700 yet, not to my knowledge but I don't stay up on Dewalt as much.
DCB230 1P 3.0 ah packs use 21700 cells. A 1P 4.0 ah is probably on the way..ala Metabo. New 9.0 flexvolt probably does as well. 20v max (18v in Europe) isnt going anywhere. The future for impact drivers, compact drills, rotary and 3speed hammers (dcd996) is more light weight and compact designs (kudos to Milwaukee and Makita) while maintaining current power output (1000 watts). 60v makes no sense for these platforms
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1 hour ago, sss said:
i have no time for online arguing .
your house current rating has nothing to do with it .
typical 15A corded tools (milwaukee claims they have same power as 15A corded) are 110V x 15 = 1650W
to reach the same power with 18V battery you need 1650/18 = 91A
so yes , to reach those power levels the batteries push near 100A , and even more for short periods .
your car jumper cables typically rated at 200a , car starter around 140A . they are much heavier gauge due to the length of the wire .
Arent corded tools typically rated by the nominal current drawn from the outlet? What does "15 amp power" even mean? Does that mean that after considering loses, the power is less than 15Ax110v. Arent some of Milwaukee's high power output tools (Sds Max) plagued with hot pack and thermal overload issues? How long can these new high power output tools run before they hit temperature thresholds? Everyone seems to mentions wire gauge and such...but what about the controllers for these tools (mosfets). They're usually the bottle neck for power output and high current.
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6 hours ago, framer said:
was it pretty? where did you see it? and why is there no info or pics yet????
Field testing. I believe Dewalt has already released a Model# several months ago. DCS577. Looked pretty enough to me. If you use their worm drive ac saw dws535, minus some weight, you'll feel right at home I think. It might share some components with it ( shoe, guard etc). Pics aren't allowed when you field test.
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17 hours ago, Framer joe said:
Any info if the rear handle flex is much more powerful then the flex circ ?
I saw this saw (lol) a few weeks ago. It's basically a DWS535 form factor flexvolt saw (rafter hook, etc). I was told the the motor is identical to the DCS575. Battery pocket sits in front of the handle. I'm guessing we'll see an announcement soon.
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3 minutes ago, overanalyze said:
For some reason I thought I read 339 cuts for the 60v saw...
Sent from my SM-T310 using Tapatalk
I may have been wrong. Didnt think to take screen shot. Will find out Tuesday i guess.
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16 minutes ago, Hugh Jass said:
Yea. I mean I can see where increases in efficiency would result in gains in the real world, if I can cut twice as fast then I'm effectively doubling my runtime, but as far as tools that run wide open like the grinder, are likely only going to see gains from brushless design, which from such a high demand tool might not be that much.
I can run through my entire lineup of batteries (35ah i'd guess) with my 20v grinder before I can charge one. I'll take what I can get.
Dewalt UK lists DCG412 at 450 max watts out. ACME site claimed 60v grinder has 13amp AC power which is (13x120) 1500 watts outs!!!! Like you said...cut twice as fast = double runtime..maybe triple in grinder case.
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3 minutes ago, Hugh Jass said:
Then it's comparable 2ah in 20v as well. DCS361 (cordless miter saw which is brushed) is listed at 183 cuts with the 4ah battery.
Then its clear. Using 60v probably allows comparable run time to 2ah 20v tools but provide significant increase in available power for heavier applications where 20v tools would probably hit shutdown current clips to protect motor from short and long term high current damage
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1 hour ago, Hugh Jass said:
Nice. Can you suggest what it would be comparable to? You're suggesting 1/3 the amps for the same wattage, so would that compare to more of a 3 or 4 amp 20v runtime on the same tool?
Acme site listed 100 2x4 cuts with 60v circ saw on 1 fully charged battery (20v 6ah/60v2ah). Not sure how that compares to other brushless 18v 7 1/4 circ saws on market. Site pulled it down. May have misread.
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10 minutes ago, Hugh Jass said:
I think it will be acceptable, clearly they felt it was enough, and in time I'm sure it'll expand...but with competitors already moving to 9ah 18v...makes me wonder what made them hold back. I just feel like already having exposure to 5ah 20v will make 60v runtime feel inferior in comparison. Spoiled if you will.
If 1000 watts is desired power output from 20v 6ah/60v 2ah battery
20volts x 50 amps = 1000watts
60volts x 16.7 amps = 1000 watts
20x50 - 50^2 x (0.1 ohm) = 750 watts out
60x16.7 - 16.7^2 x (0.1 assuming same resistance) = 975 watts out
From same battery (20v 6ah/60v 2ah)
Less energy loss using 60volts = better runtime than using 20 volts with same battery
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48 minutes ago, Hugh Jass said:
My only disappointment thus far with everything (aside from the sidewinder) is that all the leaked information claimed 3ah batteries @60v and 9ah at 20v. This seemed worthwhile for both sides of the fence even with the giant battery.
I don't think the runtime is going to be enough at 2ah with 60v tools to warrant redundant batteries at $100 a pop for guys that want more than a few tools to last the day. I hope this bit is wrong unless they've somehow made it rapid charging.
Power=(Voltage x Current )- (Current^2 x Resistance). Higher voltage = less current to achieve desired power output. Lower current= less power lost during application. Runtime might be ok
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Why DeWalt? Why Not?
in Dewalt
Posted
DCB230 has Samsung 30T 21700 INR21700-30T (3000mah) cells. The toolguy post was posted before the batteries were on the market. 20700 was used for the dcb206 6.0 packs. 21700 cells have a lower impedance than 20700 cells. Would make sense to use 21700 for a 1P pack. Lower impedance= more power (less loss due to impedance) and future proof for future 4000+mah (4.0ah) 1P pack.