Prusa Mk4. They are amazing out of the box. Easy button compared to just a couple years ago.
If you're a bit of a cheap ass, don't care about hardware support long term, don't mind the printer requiring an internet connection, and don't mind IP theft, get a Bambu P1.
Its nice to see other Android users using mag safe. I converted my family to them. Since it started on Apple I have a hard time finding magsafe wireless chargers that target android users. Most seem to work but they all advertise for iphone only and im always wondering if im getting the fastest charge for my Samsungs and Pixel.
I feel hobbies are just the early research phase of future technology. It’s starts as a diy, people invent iteratively on the idea, bringing new theories and solutions until a company takes all those patchworks ideas and turns them into a working product. Bambi seems like the first company to present a decent turnkey finished solution taking all its ideas from the DIY scene. Yea there is Ender and Prusa but they still need all that learning.
I have an Elegoo Phecda 10W which at the time you couldn't get the air assist for. So I designed my own air assist (similar to yours).
A test print caught fire (card), and this melted the air assist nozzle (PETG). This, in turn, covered the lens with PETG. While trying to clean it, I broke the glass protection. I now have a new air assist nozzle with an in built 20mm x 20mm glass slide cover to protect the laser. Not ideal, but Elegoo don't have spares yet.
Good info. I'll need to make sure I keep an eye on it. Safety wise, I have a decent fire extinguisher nearby, a camera pointed at the laser, and never leave it unattended for more than a few minutes. Haven't had any flareups in a while, but I know it can happen if the motors stop and the laser doesn't. As for damaging the module, not that I want to, but there might be worse things in the world than needing to replace the 5-watt laser.
Please keep in mind that you need to seal that print before you use it with food. Because of the layers, there’s are a ton of places for dirt and bacteria to hide that are impossible to clean. Additionally, depending on what kind of nozzle you used, heavy metals can end up in your print which you don’t want to then leech into your coffee. General advice is to just not use 3d prints first good, but if you really want to you should coat them in a food safe epoxy before using.
Those specific issues could be changed with software and a keycap puller in about 5 minutes. Obviously I can't get ESC back exactly where it "should" be, but the idea with this layout was to look and feel a bit like old 8-bit computer keyboards without forcing a drastic departure from modern "ten-key-less" layouts.
Have you seen how fast printers with stepper motors can get? They print benchies in less than 3 minutes. The bottleneck is not the motion system, it's either the hot-end or the part cooling. Also stepper are super accurate and very flexible. Drivers are advanced and can tune for torque, speed, sound etc. Collision detection and skipped step detection is also a thing.
In addition to the other points made… steppers maintain full torque even when it’s not moving, so it’s better at braking tool heads.
Also? Steppers have a higher precision to a servos higher speed and torque (but torque that’s not constant.)
Finally they have a better response time. This isn’t the speed, so much as the speed that control inputs are reflected. Imagine all the tiny wibbles a printer makes during infill, the changes in direction would be sloppier with a servo.
Steppers have a higher precision to a servos higher speed and torque (but torque that’s not constant.)
Just trying to understand this. Then how come all CNC precision machines use a servo instead of a stepper? I mean there are some ridiculously accurate machines that can position itself over and over varying under a micron (<.001mm) but the manufacturers choose servo over stepper. Is it for the sake of holding torque that servos have to be used over steppers?
It seems like the argument is that at the lower price bracket, stepper motors offer higher performance than what a equivalently priced servo+encoder+controller combo can perform.
I felt like what I was reading in this thread wasn't matching up with that I see out in industry... concerns about 'price' didn't come up until your post.
Diamond turning machines are inherently low torque, low speed, AND nanoscale operations which uses servos for driving its respective axis. See precitech -youtube and in stark comparison Roeder's 5axis optical mold machining. Wire EDM's were all driven by servo motors until linear motors became popular. Even those famous JingDiao test samples are made on machines driven by servos.
I disagree with all your points. What kind of servos are you talking about?
BLDC and AC servos maintain full torque at stop too, and have about 2-3× the torque of a stepper of similar size.
The only way a stepper can rival a servo for precision is with a high degree of microstepping, which is far from guaranteed positioning with open loop control.
I haven't directly compared response time between steppers and servos, but I would be extremely surprised if there's a significant enough difference to worry about. Most servo-controlled machines are larger and so are designed to accelerate slower than a printer, if that's what you mean. This is intentional because inertia is a thing you have to worry about, not because the servo reacts to command changes slowly.
There are valid reasons steppers are used on printers, but it's not because they have superior performance.
BLDC and AC servos maintain full torque at stop too, and have about 2-3× the torque of a stepper of similar size.
Huh, this is true about BLDCs as well? I remember seeing in a video that BLDCs tend to have very poor torque output when stopped and especially when at low speeds (due to very low efficiency requiring too high currents for drivers to supply), whereas AC motors have a pretty much flat torque curve until they get fairly fast. I'd be interested to know if this is true.
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