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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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DeWalt Drill Trigger Fwd/Rev Switch failing
My Dewalt Drill trigger is failing, sometimes I have to hold it on for
30 seconds or more while I disconnect and reconnect the battery, move the fwd/rev swtich around, spin the drill chuck, hit the drill with my palm shake it... it comes on when it feels like it. I haven't correlated it to moon phases, yet. I found a part on ebay for $63 so I think I'll try fixing it first, otherwise it's a new drill purchase instead extending the life of this old beast. This is the assembly https://i.imgur.com/LKoThQf.jpg It looks similar to this https://www.amazon.com/Black-Decker-...6DQ/ref=sr_1_6 Has anyone taken one of these apart? Does anyone have any idea how these are constructed? it looks like a sizeable heat sink so I'm guessing it's a wire-wound pot. TIA, Mike |
#2
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DeWalt Drill Trigger Fwd/Rev Switch failing
Mike S wrote:
------------- My Dewalt Drill trigger is failing, sometimes I have to hold it on for 30 seconds or more while I disconnect and reconnect the battery, move the fwd/rev swtich around, spin the drill chuck, hit the drill with my palm shake it... it comes on when it feels like it. I haven't correlated it to moon phases, yet. I found a part on ebay for $63 so I think I'll try fixing it first, otherwise it's a new drill purchase instead extending the life of this old beast. This is the assembly https://i.imgur.com/LKoThQf.jpg It looks similar to this https://www.amazon.com/Black-Decker-...6DQ/ref=sr_1_6 Has anyone taken one of these apart? Does anyone have any idea how these are constructed? it looks like a sizeable heat sink so I'm guessing it's a wire-wound pot. ** Not at all likely, almost certain to be a Mosfet drive using PWM. Does it not make a whistling sound when you pull the trigger in slightly? ..... Phil |
#3
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DeWalt Drill Trigger Fwd/Rev Switch failing
On Mon, 2 Nov 2020 19:46:33 -0800, Mike S wrote:
My Dewalt Drill trigger is failing... Does the drill have a model number? Is there a number on the switch assembly? https://www.ereplacementparts.com/dewalt-cordless-drill-parts-c-1009_1162.html -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#4
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DeWalt Drill Trigger Fwd/Rev Switch failing
On Mon, 2 Nov 2020 19:46:33 -0800, Mike S wrote:
My Dewalt Drill trigger is failing, sometimes I have to hold it on for 30 seconds or more while I disconnect and reconnect the battery, move the fwd/rev swtich around, spin the drill chuck, hit the drill with my palm shake it... it comes on when it feels like it. I haven't correlated it to moon phases, yet. ;-) Could it be the brushes if there is no direct correlation to doing / moving anything? Cheers, T i m |
#5
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DeWalt Drill Trigger Fwd/Rev Switch failing
On 11/2/2020 9:46 PM, Mike S wrote:
My Dewalt Drill trigger is failing, sometimes I have to hold it on for 30 seconds or more while I disconnect and reconnect the battery, move the fwd/rev swtich around, spin the drill chuck, hit the drill with my palm shake it... it comes on when it feels like it. I haven't correlated it to moon phases, yet. I found a part on ebay for $63 so I think I'll try fixing it first, otherwise it's a new drill purchase instead extending the life of this old beast. This is the assembly https://i.imgur.com/LKoThQf.jpg It looks similar to this https://www.amazon.com/Black-Decker-...6DQ/ref=sr_1_6 Has anyone taken one of these apart? Does anyone have any idea how these are constructed? it looks like a sizeable heat sink so I'm guessing it's a wire-wound pot. TIA, Mike I've had a few battery powered Dewalt drills. I won't get a Dewalt drill again. I 'm disappointed in the battery lifetime*, I've had chuck problems, also the clips that hold the battery in fail and the battery must be pushed back in. I'm not sure what I will get, but I know what I won't get. Â**life of battery not discharge time. -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
#6
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DeWalt Drill Trigger Fwd/Rev Switch failing
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#7
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DeWalt Drill Trigger Fwd/Rev Switch failing
On 11/3/20 6:35 AM, amdx wrote:
I'm not sure what I will get, but I know what I won't get. Makita. -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com |
#8
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DeWalt Drill Trigger Fwd/Rev Switch failing
On Tuesday, November 3, 2020 at 9:28:46 AM UTC-6, Riverman Jeff croaked:
Makita. You're awake! I was worried you had passed away. |
#9
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DeWalt Drill Trigger Fwd/Rev Switch failing
On 11/3/20 11:23 AM, Edward H. wrote:
On Tuesday, November 3, 2020 at 9:28:46 AM UTC-6, Riverman Jeff croaked: Makita. You're awake! I was worried you had passed away. No such luck Charger Boy. -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com |
#10
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DeWalt Drill Trigger Fwd/Rev Switch failing
On Tuesday, November 3, 2020 at 12:03:39 PM UTC-6, Lethargic Jeff sadly remarked:
No such luck Charger Boy. Where is your army of supporters? The ones all writing the same verbiage over and over? Usenet script run dry? |
#11
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DeWalt Drill Trigger Fwd/Rev Switch failing
On Tue, 3 Nov 2020 06:35:25 -0600, amdx wrote:
I've had a few battery powered Dewalt drills. All my power drills and drivers are DeWalt: DCD777 20v drill DCF787 20v impact driver DCD710 12V drill DCD710 12V drill in bad shape DCF886 20v driver (blown speed control) There are also several drills and drivers that I bought for parts. In general, I'm happy with DeWalt drills and drivers. However, there are some models that have specific problems and should be avoided. I don't have a list handy. I won't get a Dewalt drill again. I 'm disappointed in the battery lifetime*, **life of battery not discharge time. The small DCB120 12v 1.3A-hr and DCB207 20v 1.3A-hr packs are not very good compared to the larger battery packs. The basic problem is that the BMS (battery management system) and charge balancer is in the charter. That means that the BMS battery connections go to each cell. If there is any resistance, or connection problem, between the charger and the battery pack, the BMS won't equalize the charge between cells. One or more cells will die from overcharge, while the remaining cells will survive. The few that I've rebuilt, invariably have one or two cells out of 3 (12v) or 4 (20v) cells blown. I've tested the cells in the bad pack and confirmed that the remaining cells are almost as good as new. Cleaning the contacts seems to reduce the problem. I had to build a minimally abrasive tool to clean the battery contacts. I haven't done any further investigation due to lack of time (and lack of a clean workbench). The following is speculation. My guess(tm) is that the charger is setup to charge the battery pack to 100% as fast as safely possible. Workers in the trades don't want to be juggling tiny battery packs to make it through the day. If they have to charge, they want instant results. Slow charging doesn't sell well. The advertised charge time is 90 minutes for both 12v and 20v packs which is a charge rate of approximately: 90min / 60min/hr = 1.5C That's higher than the maximum recommended 1C (1.3amp in 1 hr) charge rate. That's what is probably killing the cells. Since I have more chargers than I need, I was going to butcher one to operate at a greatly reduced charge rate. I was also going to modify my Sky B6 imax balanced charger, which I use for charging drone battery packs, to charge the DeWalt battery packs. The plan is to reduce the charge rate and to stop charging at 4.1V (about 91%) instead of the usual 4.2V (100%). How to replace the cells in a 12V Max lithium ion battery pack https://www.youtube.com/watch?v=CZVr2B4GMvM I've had chuck problems, Not me, unless you include gluing the chuck in place with a mixture of sap, drywall, sawdust, dirt, and sand. A solvent bath, followed by a chuck teardown, fixed the chuck. also the clips that hold the battery in fail and the battery must be pushed back in. I broke the tongue off one large 20v battery pack by dropping it. I glued it back together and lived happily ever after. Talk to your friendly local 3D printing shop: https://www.thingiverse.com/tag:dewalt_battery I'm not sure what I will get, but I know what I won't get. Lots of reviews on YouTube: https://www.youtube.com/results?search_query=cordless+drill Makita might be slightly better but I like the banana slug yellow DeWalt color. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#12
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DeWalt Drill Trigger Fwd/Rev Switch failing
On 11/2/2020 9:31 PM, Phil Allison wrote:
Mike S wrote: ------------- My Dewalt Drill trigger is failing, sometimes I have to hold it on for 30 seconds or more while I disconnect and reconnect the battery, move the fwd/rev swtich around, spin the drill chuck, hit the drill with my palm shake it... it comes on when it feels like it. I haven't correlated it to moon phases, yet. I found a part on ebay for $63 so I think I'll try fixing it first, otherwise it's a new drill purchase instead extending the life of this old beast. This is the assembly https://i.imgur.com/LKoThQf.jpg It looks similar to this https://www.amazon.com/Black-Decker-...6DQ/ref=sr_1_6 Has anyone taken one of these apart? Does anyone have any idea how these are constructed? it looks like a sizeable heat sink so I'm guessing it's a wire-wound pot. ** Not at all likely, almost certain to be a Mosfet drive using PWM. Does it not make a whistling sound when you pull the trigger in slightly? .... Phil No sound at all Phil. |
#13
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DeWalt Drill Trigger Fwd/Rev Switch failing
On 11/2/2020 9:31 PM, Phil Allison wrote:
Mike S wrote: ------------- My Dewalt Drill trigger is failing, sometimes I have to hold it on for 30 seconds or more while I disconnect and reconnect the battery, move the fwd/rev swtich around, spin the drill chuck, hit the drill with my palm shake it... it comes on when it feels like it. I haven't correlated it to moon phases, yet. I found a part on ebay for $63 so I think I'll try fixing it first, otherwise it's a new drill purchase instead extending the life of this old beast. This is the assembly https://i.imgur.com/LKoThQf.jpg It looks similar to this https://www.amazon.com/Black-Decker-...6DQ/ref=sr_1_6 Has anyone taken one of these apart? Does anyone have any idea how these are constructed? it looks like a sizeable heat sink so I'm guessing it's a wire-wound pot. ** Not at all likely, almost certain to be a Mosfet drive using PWM. Does it not make a whistling sound when you pull the trigger in slightly? .... Phil Good call... https://i.imgur.com/5EBy4OQ.jpg |
#14
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DeWalt Drill Trigger Fwd/Rev Switch failing
On 11/2/2020 10:14 PM, Jeff Liebermann wrote:
On Mon, 2 Nov 2020 19:46:33 -0800, Mike S wrote: My Dewalt Drill trigger is failing... Does the drill have a model number? Is there a number on the switch assembly? https://www.ereplacementparts.com/dewalt-cordless-drill-parts-c-1009_1162.html Great parts resource, I'll look for that. Thanks. |
#15
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DeWalt Drill Trigger Fwd/Rev Switch failing
On 11/3/2020 3:49 AM, T i m wrote:
On Mon, 2 Nov 2020 19:46:33 -0800, Mike S wrote: My Dewalt Drill trigger is failing, sometimes I have to hold it on for 30 seconds or more while I disconnect and reconnect the battery, move the fwd/rev swtich around, spin the drill chuck, hit the drill with my palm shake it... it comes on when it feels like it. I haven't correlated it to moon phases, yet. ;-) Could it be the brushes if there is no direct correlation to doing / moving anything? Cheers, T i m I had great battery voltage and the battery ran the motor directly with great power, no matter what I did with the trigger and fwd/rev switch no V came out of the trigger assembly. Sorry I didn't mention that earlier. |
#16
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DeWalt Drill Trigger Fwd/Rev Switch failing
On 11/3/2020 4:35 AM, amdx wrote:
On 11/2/2020 9:46 PM, Mike S wrote: My Dewalt Drill trigger is failing, sometimes I have to hold it on for 30 seconds or more while I disconnect and reconnect the battery, move the fwd/rev swtich around, spin the drill chuck, hit the drill with my palm shake it... it comes on when it feels like it. I haven't correlated it to moon phases, yet. I found a part on ebay for $63 so I think I'll try fixing it first, otherwise it's a new drill purchase instead extending the life of this old beast. This is the assembly https://i.imgur.com/LKoThQf.jpg It looks similar to this https://www.amazon.com/Black-Decker-...6DQ/ref=sr_1_6 Has anyone taken one of these apart? Does anyone have any idea how these are constructed? it looks like a sizeable heat sink so I'm guessing it's a wire-wound pot. TIA, Mike I've had a few battery powered Dewalt drills. I won't get a Dewalt drill again. I 'm disappointed in the battery lifetime*, I've had chuck problems, also the clips that hold the battery in fail and the battery must be pushed back in. I'm not sure what I will get, but I know what I won't get. Â**life of battery not discharge time. I did have to bend the clips that hold the battery terminal on one terminal, which probably weakens them, so yeah that's an issue in general. |
#17
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DeWalt Drill Trigger Fwd/Rev Switch failing
On 11/3/2020 5:50 AM, RD wrote:
In article , says... My Dewalt Drill trigger is failing, sometimes I have to hold it on for 30 seconds or more while I disconnect and reconnect the battery, move We had a couple Dewalts at work with the same issue; after a bit of searching online, the fix was dirt buildup had dislodged a retaining clip on the fwd/rev selector. Can't remember the site (sorry), but it should be searchable. Disassemble the f/r assembly, clean and reassemble. HTH Thanks, I'll give that a go. |
#18
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DeWalt Drill Trigger Fwd/Rev Switch failing
On 11/3/2020 7:28 AM, Fox's Mercantile wrote:
On 11/3/20 6:35 AM, amdx wrote: I'm not sure what I will get, but I know what I won't get. Makita. LOL that's what my neighbor said. |
#19
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DeWalt Drill Trigger Fwd/Rev Switch failing
On Wed, 4 Nov 2020 22:30:09 -0800, Mike S wrote:
On 11/2/2020 10:14 PM, Jeff Liebermann wrote: On Mon, 2 Nov 2020 19:46:33 -0800, Mike S wrote: My Dewalt Drill trigger is failing... Does the drill have a model number? Is there a number on the switch assembly? https://www.ereplacementparts.com/dewalt-cordless-drill-parts-c-1009_1162.html Great parts resource, I'll look for that. Thanks. They're just one of many DeWalt parts dealers online. https://www.google.com/search?q=dewalt+drill+parts However, the parts are rather expensive so I prefer to buy broken power tools on eBay and cannibalized them for the parts I need. That's one reason why I have so many DeWalt drills and impact drivers. I buy one for parts, which can be used to fix several others. https://www.ebay.com/sch/i.html?_nkw=DeWalt+drill+for+parts -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
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