Converting cordless to corded

leenowell · 2018-10-07T09:49:24+00:00

Hi All I have a Graco paint sprayer and cutting a long story short am thinking of converting it to corded. I have looked online and it seems at least for drills this seems doable how ever the ones I have seen so far have the batteries which push on to the dr ill and have 2 connections. The paint sprayer has an 18v slide on type lith ium ion battery with many connections and the sprayer has 3 connectors to t he battery. Anyone ever tried doing this before? A few initial questions spring to mind 1. I can clearly identify the + and - but what is the 3rd one for and what should I connect it to? I have temporarily wired the + & - to a DeWalt batt ery + & - and it seems to work. 2. The sprayer says it is 15 amp so assume I need a transformer whose outpu t power is at least 270 Watts ? I have seen these BDX6I As an example so assume something like this would work? 3. I was thinking of striping out the cells from the existing battery and w iring just the 3 connectors the sprayer uses to the transformer. I assume t he rest can be left disconnected? 4. Maybe a daft question but presumably any wire I use has to be able to ha ndle 15 amps (or if I go for the 360 watt one I might as well ensure 20 amp s)? Is the fact that it is 18v DC important when selecting the cable? Eg is normal cable design for 20 amps at 240 v AC correct? 5. Any suggestions on the connectors to use? Was going to do a split in the cable so that in the future I could add other battery types of needed to t he same rig. Was planning on soldering connectors in the battery itself (a ssume any electrical solder is ok?) And assume the transformer will come wi th connectors to connect to it. Any top tips etc or bitter experience of doing this would be greatly apprec iated Thanks Lee.

Oct 07, 2018 23 Replies

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Dave Plowman (News) 7 years ago

Big fan of those. They seem more robust than any other mains (etc) connector I've come across.

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GB 7 years ago

4m of the latter will weigh about a kilo? That's not a lot, but it might be noticeable spraying the ceiling for a long time?

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John Rumm 7 years ago

You can always clip the cable to your belt, so you are only "carrying" half the length of the bit from belt to tool. Also you will have lost the weight of the LiIon battery, so should not be significantly worse off than before.

The cable on my sander is about 4m long, and while its fairly heavy, you don't really notice it because of its great flexibility and because the machine itself feels quite "dense" in the hand even if in absolute terms its very small and light.

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Andy Burns 7 years ago

I've seen some Graco battery-powered sprayers that *do* need an earth to prevent static buildup when used with the "wrong" type of paint ...

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