I stand corrected. Still, the mechanism is similar and relatively simple once you've messed around with it in person.by obelisk79 - General
That sounds like an unnecessary amount of motors in general. Using CoreXY you only need two stationary motors to handle XY movement, the opposing nature of the forces applied via the belt drive helps with mechanical accuracy. CoreXY seems confusing but is very simple in actuality. It's basically the same way movement is handled in an Etch-a-Sketch. While auto bed leveling with 3 z motors doesby obelisk79 - General
Thanks for that Wurstnaseby obelisk79 - Firmware - experimental, borrowed, and future
pictures may help illustrate... if it threads tight but comes loose after use, perhaps a simple solution of a small drop of superglue at the top after tightening it may be enough to keep it that way without making it impossible to disassemble in the future.by obelisk79 - Reprappers
Just like anything else, carbon fiber can be obtained at low cost from china. Quality is at your own risk.by obelisk79 - Reprappers
Quotethe_digital_dentist Has anyone compared the weight of the CF tubes to the equivalent size of aluminum tubing? No, but for the same volume of material carbon fiber is roughly 40% lighter than aluminum. I would suspect after mounting etc you could realistically expect somewhere in the ballpark of 30+% potential savings? The tubes I have are incredibly light.by obelisk79 - Reprappers
If you're willing to explore new-ish firmware Klippy seems to get incredible performance out of 8bit hardware. I wouldn't give up on your Mega/RAMPs setup until you at least check it out. I agree there is a gap in the lowcost 32-bit market.by obelisk79 - Developers
Some people have zero patience.by obelisk79 - Look what I made!
I'm using carbon fiber tubes in my core-xy, it's not based on the hypercube pre-se but I did take his idea for the tubes and bushings. I'm still in the build-phase so cannot comment on the performance yet, but I also made my design based on the concept of reduced moving weight.by obelisk79 - Reprappers
I'm in the build stage of a large format corexy printer, the print bed will be approximately 475mm x 475mm. How should I handle heating the bed. The commonly available options of silicone pad and/or pcb style don't seem to come in a large enough format.by obelisk79 - Developers
Hope you managed to get everything working in time! Let us know how it goes.by obelisk79 - RAMPS Electronics
adc_dc, I believe all NUCLEO64 boards have the exact same pinout, so yes should be very easy to port between the two boards. Also, they are based on the same processor architecture. The morpho connectors on the board have enough I/O that the peripheral board I'm currently designing should remain relatively compact and feature-rich. I've almost finished with component selections and schematics.by obelisk79 - Firmware - experimental, borrowed, and future
Have you tried using a different spool of PLA yet?by obelisk79 - Printing
Can't make an omelette without cracking a few eggs right?by obelisk79 - RAMPS Electronics
newbob RD3D is not being designed for the Nucleo. I am working on a one-off design for the Nucleo F446RE I just got in the mail today however. I'm not planning on releasing any information for it until I can at least say I have something that works though, if at all.by obelisk79 - Firmware - experimental, borrowed, and future
Gotcha, just saw the number and was thrown off.by obelisk79 - Reprappers
extruder temp of 280C sounds a geat deal too hot for pla. Should be in the 185C to 190C range imo.by obelisk79 - Reprappers
If Klipper is calculating well in advance due to the allowable cpu overhead and merely scheduling the sending of data to the client to keep it's memcache full wouldn't jitter be less of a concern?by obelisk79 - Developers
There was a time when 4988's were the driver of choice, then 8825's and then TMC2100s. Times change, being able to adapt your hardware at relatively low cost has merit. Your approach does too. Neither is the clear best solution. Placing the heatsink directly on the chip or underside of the pcb will absorb heat, the increased surface area with a fan could also compensate for lack of convection. Aby obelisk79 - Controllers
A proper heatsink with TIM should help greatly with the thermal capacity in place of the lack of pcb. I would actually prefer that as a means of dissipating heat as relying on the pcb alone means that heat can spread to other components on the board which over time can cause erratic issues. Not to mention that it is still a passive cooling solution. Now a combination of both would be the betteby obelisk79 - Controllers
From how I understand the way klipper works, all of the step and control commands are calculated and timing scheduled on the host, the client board then receives that data and uses it's internal clock to execute the commands as calculated on time. I believe Kevin explains it better somewhere in the klipper thread Edit: Your orange pi should do the job as host quite well.by obelisk79 - Developers
With that kind of hardware any approach should be more than adequate in terms of printer performance. I originally suggested Klipper because it was specifically designed to be easily portable across hardware, pariing with a RPi would have meant that it would have been easy to pair with existing Pi displays and peripherals, it also brings wifi, ethernet and usb device support (ie webcams) to theby obelisk79 - Developers
That should be possible the way you are describing.by obelisk79 - Developers
Yeah, I was just coming back here to say that I now understand why 5v is sufficient. I plan on supporting 24v and agree that I would need more components to make that work. I'll look into shifting the 3.3V to 5V for driving an appropriate MOSFET. Thanks for the feedback!by obelisk79 - Controllers
Thanks for the information, now, shifting to 5v is what you're doing on the Duet series, but would there be any benefit to perhaps using a simple npn circuit to provide a 10v gate to get rated Rds? Or is that also overkill. I'm an electronics technician by trade, however circuit design and EE is obviously not something that I have experience with. I appreciate the feedback.by obelisk79 - Controllers
So doing some research on the matter, I'm thinking a Gate Driver may be the appropriate way to apply the rated voltage and avoid issues. Thoughts dc42? Anyone else? I find it somewhat odd that so many people are designing boards that drive MOSFETs with the 3.3v logic rather than utilize something simple like the above mentioned driver or similar solution.by obelisk79 - Controllers
Klipper really needs a host with a base operating system like Linux. So running it on your display board is not an option.by obelisk79 - Developers
^I agree, one of the alluring aspects of Klipper is it's portability, and it's ability to offload most complicated and high level functions onto a host. That allows you to get better real-time performance on the same controller because it can focus solely on the low level stuff like executing commands. That headroom gained by this approach also means more complicated processing can be done withouby obelisk79 - Developers
So if I wanted to choose MOSFETs for driving heatbed/hotend, what characteristics do I need to pay most attention to? 24V source, 3.3v gate I was looking at these, but I'd like an opinion from some of you more experienced than I.by obelisk79 - Controllers
That is a lot of holes. Wow! It's one thing to see in the files, another entirely too see them on a physical board.by obelisk79 - RAMPS Electronics