Pouet
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Posts posted by Pouet
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I don't see the point of using this outside of a van. I would build some kind of sysport (https://goo.gl/images/A5Nzxu) instead if I was working from my shop. The rack is better in a van because it is lightweight and takes no space when you are not using it but I see no reason to use it in a shop.
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10 hours ago, tpamatmat said:
The Echo 58V 4.0ah battery pack weighs slightly less than the DeWalt 40V 7.5ah battery pack. Echo's pack uses 2500mah 18650's, configuring it with 20700 3000mah cells would result in a battery pack with similar run times(due to increased battery capacity/motor efficiency) and minimal weight gain.
Yeah it's possible but it may cost more (I don't know the different cell prices) and it's hard to tell at which load which motor is more efficient. You need to check the data sheets and do some simulation. I'm not saying their statement is not bullshit, just saying that there could be real engineering reasons to not dump the 40V line.
10 hours ago, tpamatmat said:You do not have to increase the motor size every time you increase the voltage. Only when the increase in voltage saturates the motor. Do you know that the increase from 40V to 60V on the DeWalt 40V brushless motors saturates them? In the RC world it is often shown that you can go with a smaller motor at higher voltage. RC is all about weight.
Agreed. That's why I said it may increase. You can also use better material I suppose with better magnetic permeability but it may cost more.
It's really hard to tell without all the data so that's why I'm trying to keep an open mind. I may be too optimistic :-)
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50 minutes ago, DR99 said:
That website just seems to be for the 12v automotive charging stuff nothing to do with 12v battery powered tools.
Yeah, this is what I was afraid of...
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49 minutes ago, DR99 said:
That website just seems to be for the 12v automotive charging stuff nothing to do with 12v battery powered tools.
52 minutes ago, Bremon said:Why would a tool or battery need to be bigger to be 60 volts? The only real difference is the wiring. I already explained the watt hours, which is basically the gas tank, ie, energy potential. The battery cells play a huge part too. There's a reason the FlexVolt 3.0/9.0 gets almost double the runtime of the 2.0/6.0 despite the numbers saying it would need to be 4.0/12.0 for that to make sense.
Because the higher the voltage applied on a motor is, the higher the magnetic field intensity is. If the magnetic field is too strong for your core (the rotor in the case of a motor), you end up in saturation territory which usually results in your motor getting destroyed. In order to increase the capacity of your motor to handle bigger magnetic fields, you need to increase the size of the rotor which result in a bigger and heavier motor. The same goes with transformer by the way. So to increase the voltage, you must increase the motor size. See https://en.wikipedia.org/wiki/Saturation_(magnetic)
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13 minutes ago, tpamatmat said:
Seems odd though, right? You have a 60V line of products with more power and potential for the professional market and yet they push a less suited 40V line just because they have larger battery packs? Why not just produce battery packs with larger capacity for their 60V line.
Well I'm not saying it's not BS but in order to have the same runtime as a 40V battery, a 60V battery on a 60v tool would need to be bigger. The tool would probably be bigger as well. This may not be practical for professional users but ok for occasional users. At the same time, 20V is probably too low a voltage for outdoor tools, hence the 40v platform.
I see the 40V being the equivalent of the 20v platform but for landscapers. This way they can focus on providing optimized ergonomics just for these users. But who knows, sometimes Dewalt is hard to follow but I like them having different lines optimized for specific use cases. I just wish they would give their 12v line a little more love. Love the ergonomics of the 12v driver. I'm a bit more hopeful after seeing this website : https://www.dewalt12volt.com/.
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I read on Dewalt facebook page that 40V will remain the line of choice for professional landscaper because of their long runtime. The Flexvolt line is more for the homeowners who already own flexvolt batteries and just use their outdoor equipment occasionally.
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I have this one :
https://www.amazon.ca/DEWALT-DWFP55130-Heavy-Quiet-Compressor/dp/B00HQYFZGM
Love it. Since the pressure can go up to 200 psi, it is very light and above all less noisy. Plus, it only draws 12 amp so no risk to trip a breaker with it. I even used it to do some light framing.
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By the way, does anyone know if Dewalt plan to make a bigger tough case? I got a couple of ds400 that I use for camping and outdoor stuff (I love being able to leave my stuff outside of the tent even in pouring rain) but I find the boxes a bit too small
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14 minutes ago, Bremon said:
Funny enough Quebec is widely regarded outside of Quebec as stereotypically being the rudest, most blunt Canadians lol. Montreal is more diverse and tolerant of anglophone though.
Born and raised in Quebec city. I know people outside of Quebec think that Montreal is more tolerant of anglophone but trust me on that, you'll find more "hard line" separatists in Montreal then elsewhere in the province. People outside of Montreal just don't feel threatened by English.
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14 hours ago, Framer joe said:
New battery available at acme...dcb609.,,,$199. What's amazing is it's 180 wh as compared to Milwaukee 9ah at 162 wh .......yup yup
Dewalt is using the maximum voltage while Milwaukee is using the nominal one (20V vs 18V) as a reference point.
In fact, you can see it by a simple calculation :
Dewalt : 9Ah x 20 V = 180 Wh
Milwaukee : 9Ah x 18V = 162 Wh
So there is no difference in capacity between the two batteries.
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2 hours ago, Mordekyle said:
Be that as it may, it has more power.
I can tell you from experience that the FV battery makes the saw run better.
I didn't expect it to, ("The motor always run (sic) at 20v.") but it does. I thought it would run the same, but it doesn't.
Sent from my iPhone using TapatalkGood to know. It's probably because the high capacity battery has a lower internal resistance. So under a big load, where you draw a lot of current, the voltage start to drop and this happens more significantly with a smaller battery.
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11 minutes ago, Mordekyle said:
I know my 20v 6 1/2 circular saw runs awesome with a flexvolt battery. It powers through cuts that would bind with a 4.0 or 5.0 battery.
Although I have the 20v miter, I haven't had the opportunity to try it with the FV battery. I imagine it may do the same. It is a bit slow/underpowered with a 4.0 or 5.0 battery. Now, I'm curious. . .
Sent from my iPhone using TapatalkA FV battery would just increase the runtime. The motor always run at 20V.
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I got this saw and I'm using a 40t Diablo blade. It works great. I was using the Dewalt 40t at first but I was getting too many tearouts while cutting cedar panels. The cuts are a lot cleaner with the Diablo blade. I like Dewalt tools but not their blades. It's worth getting a Diablo blade in my opinion.
20v tools
in Dewalt
Posted
No I mean the 4'' saw.