DROK 20A AC to DC Buck Converter

I am using this Drok 115VAC to 24V 20A variable power supply, along with a YaeTek 24V DC 350W Permanent Magnet Electric Motor, to drive my Taig Micro II lathe. Considering this whole kit cost about $80 I'm very happy with the result. While not perfect, the value is so high I have to give it 5 stars. If you've been thinking about one of these motors for your micro lathe I say, go ahead! If you are running the 115VAC Marathon motor that Taig sells, then you know about that motor. It's OK, but the speed range with the 4 step pullies is 430 RPM to 1725 RPM, pretty high for larger parts. And it's big, heavy, and kind of brutish - there is no way you need that much power, nor can it even be transmitted with the stock belt. This DC motor setup runs well down to about 5 volts/570 RPM, which is a lathe speed of 140 RPM. It will go a lot slower, but it sounds a bit notchy. It's happier above 5 volts, and I usually have it set about 16 Volts, which makes a lathe speed of 450 RPM to 1800 RPM. The power supply goes to 28 volts and the motor is spinning at 3200 RPM. This PS has been flawless in this application. It is the voltage regulated only model. Using a "Kilowatt" meter I'm seeing up to about 120 watts in my application. So, about 5A at 24V. The PS seems perfectly happy, and the fan has never turned on. Judging from the motor whine while running the lathe there is a very minor variation in RPM with no load, just a few RPM or small fraction of a percent speed. Under cutting load I've not noticed any significant speed change - it does sound like the system is working harder but that's normal. The motor has plenty of torque for this application. At 7V I have no trouble machining 2" diameter aluminum at a no drama SFM. Once again, the belt is the limitation. The only negative for me is the motor is kind of loud. It makes an ever rising pitch and volume whine as RPM increases. I only use this lathe for occasional small parts, so the noise doesn't matter. If you are doing production, it might get tiresome. Who knows how long it will last. Considering it's intended use as a scooter motor I'm hoping with this very light lathe duty it will last forever.

I got this to kind of use as a benchtop supply. I had a variety of DC motors I needed to test, at a variety of voltages and power ratings. They were intended for battery powered applications, but I didn't have the variety of batteries I would have needed to test them. I looked at actual benchtop power supplies, and they all seemed to top out at about 10 or 11 amps, and were much more expensive. Before ordering this, I hadn't seen anything like this before, although they look to be pretty common. I also bought some leads that I connected to it to make it easy to connect and disconnect what I am powering. It worked perfectly. Provided the voltage range and current I needed and one of the motors, was 24V DC and drew 17.5 Amps, which this provided with no complaints. While I do appreciate the Voltage indicator as a rough guestimate of the voltage, probably "good enough", I did hook up a more accurate meter to set the voltage during my testing. It was easy to get it to within a few 10ths of a volt, but getting it much finer than that took a very delicate touch, but with patience, I could even get it to the hundredths and once there, it would hold it. I see they have another model where it has both voltage and current limit adjustments, and I am thinking I might pick one of those up too.

I ask Amazon's Rufus this: "can it power to cordless power tools; like a drill?" The answer wasn't what I hoped for. This was part of the reply; The DROK 48V Power Supply you're looking at outputs 0-48V at up to 10A, but most cordless drills operate at much lower voltages (12V, 18V, or 20V). While this power supply could theoretically power a drill, the direct connection would be challenging since cordless tools are designed to work with specific battery packs and connectors. The answer wasn't entirely correct. I found that the DROK 48V Power Supply will power most all my workshop desk tools; drills, sanders jigsaws, etc. This provides me with ability to use all my old outdated tools without buying batteries. I simply soldered electric cords to the devices. They all run and work great now.

I bought 2 of these units about 4 years ago, and they're still in daily use 7x24. --I thought I'd use as a general bench / lab power supply, however I didn't realize current out was not adjustable -(as the product description _clearly_ states!) This might be undesirable if you need to experiment with low current output One unit provides 9.8 amps out, the other unit provided 12.8 amps. Again - they produce full current as soon as you set the output voltage. I added a 15a circuit breaker and they provide 28V all year long. Mine came with an additional output voltage adjustment variable resistor, for me was unneeded.

all good thanks

Great item nicely packaged

Bueno

Stable output voltage

Used inverter to replace the battery setup for my water faucet. (Touch on/touch off). Adjustable DC voltage perfect to fine tune voltage at the faucet(9V at faucet supply set at 9.75). Time will tell if the inverter will last. All in all satisfactory for my use.