Stuff you have made today

[Pete.]

Made a rough and ready little steel ramp from 100x50 box section. It's to allow a 1 tonne bobcat to drive into the back of a 20yd skip as it will only just fit into a narrow site entrance so no way to load over the side as usual. It'll have a 1" plywood top put on it tomorrow which is plenty strong enough for the job. The bobcat is 900mm wide this is 1350 overall. Doesn't need a runner in the middle coz if you have a wheel ther ethe other wheel is off the side.

 

[jimbo84]

Adapted the rear drive of the lathe to take a 3 phase motor. The previous motor had a slotted foot, this motor didn’t so slotted the rear drive instead.

 

[Hood]

Just done a couple of slates.

 

[sako243]

Just a warning if you’re not aware- or if you are others might not be-

Unlike almost everyone else Dewalt does its battery discharge protection in the tool - the batteries themselves have nothing stopping them over discharging and damaging themselves.

As far as I know MOST of the big brands don't have any protection in the battery pack. The only brand I'm aware of that does any protection in the battery is Makita.

 

[jmp49]

As far as I know MOST of the big brands don't have any protection in the battery pack. The only brand I'm aware of that does any protection in the battery is Makita.

And the exception is... Ryobi, which has a OZ8940ATN BMS on a circuit board in the pack itself.

Today I earned some much needed wife credits, spa has been blowing out one of the fancy rotojet thingies because its little plastic tabs have gone weak, and they are difficult to get hold of. I'm told theyre cmp jet bases and have just gone out of production hence everything left in stock now has a rarety price tag...
So scanned the ejected one, fixed the tab in cad, 3dp in resin and voila, beer in spa and happy wife. If it breaks because resin printing is weak, I'll do one in abs or nylon.

 

[Dev]

As far as I know MOST of the big brands don't have any protection in the battery pack. The only brand I'm aware of that does any protection in the battery is Makita.

Cordless Tool Battery Over-Discharge Protection Table

Brand	Over-Discharge Protection	Notes	Reference Link
Milwaukee	Yes	REDLINK™ Intelligence provides overload and discharge protection within the battery pack.	Milwaukee M18 REDLITHIUM XC5.0
Bosch	Yes	Electronic Cell Protection (ECP) safeguards against deep discharge and other issues.	Bosch POWER FOR ALL
Makita	Yes (XGT), Partial (LXT)	XGT batteries have full protection; older LXT batteries may rely on the tool.	Makita 40V Max XGT Battery
Hilti	Yes	CPC technology monitors individual cells to prevent over-discharge.	Hilti B22 4.0 Battery
Ridgid	Yes	IntelliPort technology includes over-discharge and cell balancing protection.	Ridgid 18V Lithium Batteries
Ryobi	Yes (High Performance models)	Newer Lithium+ and High Performance batteries have internal protection; older ones may not.	Ryobi 18V 4Ah High Performance
DeWalt	No (tool-controlled)	Battery relies on the tool to prevent over-discharge; use external protection if repurposing.	DeWalt Battery Discussion

 

[sako243]

Cordless Tool Battery Over-Discharge Protection Table

Brand	Over-Discharge Protection	Notes	Reference Link
Milwaukee	Yes	REDLINK™ Intelligence provides overload and discharge protection within the battery pack.	Milwaukee M18 REDLITHIUM XC5.0
Bosch	Yes	Electronic Cell Protection (ECP) safeguards against deep discharge and other issues.	Bosch POWER FOR ALL
Makita	Yes (XGT), Partial (LXT)	XGT batteries have full protection; older LXT batteries may rely on the tool.	Makita 40V Max XGT Battery
Hilti	Yes	CPC technology monitors individual cells to prevent over-discharge.	Hilti B22 4.0 Battery
Ridgid	Yes	IntelliPort technology includes over-discharge and cell balancing protection.	Ridgid 18V Lithium Batteries
Ryobi	Yes (High Performance models)	Newer Lithium+ and High Performance batteries have internal protection; older ones may not.	Ryobi 18V 4Ah High Performance
DeWalt	No (tool-controlled)	Battery relies on the tool to prevent over-discharge; use external protection if repurposing.	DeWalt Battery Discussion

At least the Milwaukee statement that they've got over discharge protection has been proven as bull poop (this is me as a Milwaukee user). Fairly sure the majority of the others have also been shown to be false statements.

 

[Dev]

That video is says they do have over discharge protection circuits that prevents the per cell voltage going below 2.0v. This is lower than the 2.5v the video author thinks it should be, I don’t know the validity of that. He also mentions in the video that 2.0v minimum is within the Samsung battery cell spec for certain types.

Dewalt has nothing.

Lithium batteries are most likely to catch fire, catastrophically, when empty.

 

[sako243]

That video is says they do have over discharge protection circuits that prevents the per cell voltage going below 2.0v. This is lower than the 2.5v the video author thinks it should be, I don’t know the validity of that. He also mentions in the video that 2.0v minimum is within the Samsung battery cell spec for certain types.

Dewalt has nothing.

Lithium batteries are most likely to catch fire, catastrophically, when empty.

They have monitoring but no actual protection - that is down to the tool. Plug something dumb into the battery and you WILL overdischarge it. The BMS only signals the tool to tell it there's a fault, it doesn't actually cut the power.

Tool_Scientist
•2y ago

Monitoring is in the battery, actual cutoff is done by the tool. Battery measures voltage of all cells and when any cell goes below 2.0V (for 18650 packs) or 2.5V (for 6ah, 9ah and high-output batteries), the battery signals the tool to stop.

Most batteries have no way of cutting power. 12ah may be able to cut power, but I'm not sure. Thrifty Tool Shed found a pair of high powered mosfets under the big heatsink, but it's unclear what they're for. It doesn't make sense for them to be used for LVC as that is already handled by the tool.

From the design perspective the tool already has to have a big MOSFET in there to control the tool so why introduce another lossy component in the battery? It's extra cost and less efficient and they get around it by saying you should only use their tools with their batteries which they know and have tested to work.

 

[pint]

I'm more disappointed by the **** poor battery balancing, for a perceived upper quality manufacturer Milwaukee sure cut some corners

 

[Craig-SM]

At least the Milwaukee statement that they've got over discharge protection has been proven as bull poop (this is me as a Milwaukee user). Fairly sure the majority of the others have also been shown to be false statements.

Interesting watch. I've never tested the cell voltage when run down instead just sticking it back on a charger. Thinking of what batteries I have and it's a 4ah, 6x 5ah, a 9ah (not that rare) and a Forge 8ah, no M18 High Outputs but I do have in M12. Not one of my batteries has ever died and most are over 5 years old. The tool just stops when the battery is flat and not the slow grinding to halt like it shows on the video and then checking the battery I get the flashing 1 bar to confirm it's flat before charging (rapid chargers), so they are been electronically stopped rather than running out of power. I've recently been sanding the walls and wood work with the 125mm RO sander and multitool which are power-hungry and 5ah batteries are lasting around 25 minutes so battery off and put on charge with another charged battery ready to go with just enough rest in doing so for my hands to stop tingling and the pad to cool down. Not sure if I'm just lucky or there is something I'm doing that is prolonging the batteries.

It was good to hear that the battery adapters are a risk to battery life as I'm a firm believer in using the manufacturers battery designed for their tools.

 

[Pete.]

Ramp went into service today:

 

[sako243]

so they are been electronically stopped rather than running out of power. I've recently been sanding the walls and wood work with the 125mm RO sander and multitool which are power-hungry and 5ah batteries are lasting around 25 minutes so battery off and put on charge with another charged battery ready to go with just enough rest in doing so for my hands to stop tingling and the pad to cool down. Not sure if I'm just lucky or there is something I'm doing that is prolonging the batteries.

I'm not sure if it's applicable to all technologies but I'm fairly sure it's lithium ion that's dangerous to over discharge, over charge, over heat and do pretty much anything else with. By dangerous I mean fire starting dangerous. That's why most batteries are shipped at 50% charge.

The adapters can be used but their limitations need to be noted. For example I've got one for a soldering iron for an M18 battery but I keep an eye on the charge level, it's only 9W so will last ages. I will build a protection circuit at some point but need to finish the housings first.

 

[Farside]

beer in spa and happy wife.

Is there a shortage of asses' milk around there?

 

[Tupers]

I made a pair of new drip rails fit the Mini and used the single side spot welded to get the attached.

Replaced a manky section of the RH A-pillar.

And welded up some worn Austin 7 clutch plates.

 

[Blobber]

I made a pair of new drip rails fit the Mini and used the single side spot welded to get the attached.
View attachment 499153
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Replaced a manky section of the RH A-pillar.
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And welded up some worn Austin 7 clutch plates.
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The single sided spot welder looks interesting, is it an add on to a machine or a whole new bit of kit?

 

[Tupers]

The single sided spot welder looks interesting, is it an add on to a machine or a whole new bit of kit?

It’s part of the Wieländer and Schill Invertaspot machine.

One half is a two sided pneumatic spot welder and the other is the gun which you can use for dent pulling, stud/nut welding, shrinking and single sided spot welds.

 

[Blobber]

It’s part of the Wieländer and Schill Invertaspot machine.
View attachment 499164
One half is a two sided pneumatic spot welder and the other is the gun which you can use for dent pulling, stud/nut welding, shrinking and single sided spot welds.

Nice, might have to do some reading on that, not that I can justify one

 

[badabec]

And I was hoping it was £20 from Temu

 

[Puglet1]

And I was hoping it was £20 from Temu

It was £20 from Temu. Unfortunately, Tupers bought the last one so you missed out.