Can I wire the contacts from the charger directly to the switch on the drill to bypass the battery
I'm going to be using the motor from a cordless power drill for a home theatre project (remote-controlled rotating TV), but I would much rather have constant power supply and not have to mess with the cordless drill batteries. The reason I am using a cordless drill is for the 2-speed gearbox (i need low rpm w/ more torque) and the autobrake. My question is this:Can I wire the contacts from the charger directly to the switch on the drill to bypass the battery? If not, what would be the problem/result of this? How can I make this work?
The cordless drill battery service cener answer me:Chargers are current regulated at a safe level designed for the battery. As such, it is not sufficient to run the motor directly, especially under load. A better solution is to find or build a suitable power supply. I would think something with a couple of amps should put you in the game. If you build it, it would only take 3 basic parts -a transformer (with a secondary close to the voltage and current you need), a bridge rectifier, and a modest electrolytic filter capacitor.As to wiring, the power supply should be hooked to the leads of the battery contacts. The leads of the drill's switch would be hooked to whatever actuator you are using with your remote.
I once played with a battery drill - hooked it up to a 12V drill battery for mobile use - and measured about 9A while drilling an 8mm hole into aluminium. You could measure this (best to measure under load, so do it once it's installed and working),You could leave the battery in circuit by connecting the charger to the battery contacts while the battery is in the drill. The drill battery would always receive a charge and would supply the larger current when the unit is occasionally activated. Depending on the quality of your charger, this may cause the battery and charger to get warm, maybe even overcharge the battery. If so, make sure you can switch the charger off; I doubt you'd need to switch in on very often.If all this spells a hobby in dc power, the concept of storage for short term peak loads will be well demonstrated. If not, your theatre will look good anyway.
Is the higher the voltage, the more powerful of the drill battery?
Most people think the higher the voltage, the more powerful the machine is. This is only partially true. If you do the math of combining voltage with Ah, you may be surprised. Believe it or not, a 12V drill with 1Ah battery has the same power as a 24V drill with 1Ah cordless drill battery.
You always say you need more power. But what is power? A physics professor would say it is "torque times speed". So what is torque? Think of it as a "brute force". Torque is what makes your car climb a steep hill, not the power. And, torque is what lets you drive large screws into a think piece of lumber. When you see the MegaTorque™ icon on a WORX cordless drill, you know that its torque value is best in its class.
As you already know, the same speed does not work for every job. Drilling in metal requires a slower speed or all you'll get is a burnt up bit and a cloud of smoke. But try using the same slow speed to drill into concrete and it may take you a week to finish your hole. WORX tools provide a large range of pre-set speeds which give you the freedom to choose the right speed for your job.
Demanding workers believe that keyless chucks may be OK for woodworking, but keyed chucks are the only way to go if you need to drill into metal or concrete. This may be true for other chucks but not with the WORX Anti-Slip Chuck. It makes sure your bit stays tight even in the toughest application
Believe it or not, voltage is not everything. So the next time you're looking at a cordless tool, pay attention to the batteries Ah value. It indicates the quantity of energy that can be stored in the batter pack. The higher the better. Just think about your car's gas tank: the bigger it is, the less you have to stop at gas stations.
Have you ever wished that you had an extra hand? Well, we're not plastic surgeons but we did design our worx keyless chucks to be conveniently operated with only one hand. So think about that the next time you are changing your bit at the top of a 15-foot ladder.
Nobody likes guests who over-stay their welcome. like your mother-in-law who came to stay for the weekend and instead stayed a month. The same can be said for bits and blades that keep spinning after you've released the trigger. It's definitely annoying and can be dangerous. That's why many of your worx tools come up with an automatic blade brake which helps to stop the motor from turning as soon as you release the trigger