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Re: Ideas for 1000mm^2 bed - 8 years ago
QuoteL4nce0 I'm looking at I can order a MIC 6 plate 46inches ^2 (bed is just under 40 inches) at a quarter inch thickness, with shipping for like 600. These are casted plates with high precision! Maybe that's the solution? I was surprised I could order them so large and have delivery for just 60. (I mean I just paid UPS 100 to ship a broken b9 across country) Thoughts? I mean, those are some Bby Koko76 - General
Re: This engineer claims 100 grams direct extruder. I want one
- 8 years ago
QuoteJamesK Ah, sorry, I completely missed the bit about X & Y. No idea how people work those out other than by trial and error. I don't think there's any particular need to use the same motors on X & Y, so I think you're free to use what ever works/fits best. There are online calcs to work out motor torque required to accelerate a given mass, that is a good place to start. has one on iby Koko76 - General
Re: This engineer claims 100 grams direct extruder. I want one - 8 years ago
QuoteJamesK Quoteto3dornottobe It depends, 7075 T6 is pretty tough. Ooh yeah, that's some nice stuff. I only have 6061 and whatever the dubious stuff from homedepot and lowes is. Typically one of the 3xxx series, otherwise known as "gummy, useless garbage". I ordered one of the 70g pancakes to work into my setup rather than the short 11. Still picking a gearing option.by Koko76 - General
Re: New RepRapFirmware 1.09x-dc42 - 8 years ago
Working well here, both the beta and then the update via web interface (so awesome, thanks to all who worked to get that feature in there). So far my issues with 1.09r with file uploads have been solved. I should say that I've only uploaded a few files to print thus far, but one was a 47 meg, which would likely have caused issue before. Uploading the firmware update was painless as well.by Koko76 - Duet
Re: How to reduce rough edges on aluminium plates during laser cutting? - 8 years ago
When I worked for a place that did significant laser cutting, we ran most piceces by default through a "timesaver", which is a wide powerfed belt sander made for just such a purpose. If the parts were too delicate for this, we had folks hand deburr. Frequently a right angle die grinder and an open weave pad wheel. Never gave a customer burred parts. You also might specify on your prints "partsby Koko76 - Laser Cutter Working Group
Re: This engineer claims 100 grams direct extruder. I want one - 8 years ago
QuoteJamesK Backlash shouldn't be an issue as you're not interested in details of the motion of the filament during reversal, only in it's final position. Any backlash is factored into the retraction distance, and since the real work of extrusion is always done in the same direction backlash doesn't factor in. The problem with large gear ratios on the extruder is that you limit the retraction speby Koko76 - General
Re: Cutting 1mm PEI ? - 8 years ago
A straight edge and a razor knife will work. It takes many shallow cuts, not too much pressure, concentrate more on keeping the knife straight and moving smoothly against the edge. I find it works best when done on a harder, but scrunchable surface underneath, I have a piece of shelf board I keep around for cutting stuff on.by Koko76 - General
Re: Need help choosing nema for dual direct extruder - 8 years ago
You don't say what diameter you are pushing, which would make a difference. Regardless, you might look into geared Nema11's. I run a 27:1 short body and 1.75mm filament. I have also used the 5:1 short body for this same extruder, and it worked ok, but was on the edge.by Koko76 - General
Re: Duet development news - 8 years ago
Features that would be really nice to have : One or more pins that I can tie to a simple G code. In the machines I work on every day I have a number of "spare m codes" that I can use to turn on a relay, send index pulses to an independent rotary table controller, or whatever needs turning off and on via program control. Bonus points if these were opto isolated so I can do whatever with whateverby Koko76 - Duet
Re: My first build, all metal delta "The Imp" - 8 years ago
As others have said, you are extruding too much plastic. There are several methods to fix it, either via adjusting the extrusion multiplier, extruder steps per mm, or the filament size in your slicer. There are a number of objects floating around which are like a series of steps. You set your infill to 95% and watch to see that the infill sections have tiny gaps, but top layers have none. Youby Koko76 - Delta Machines
Re: SmoothieBoard Users - 8 years ago
Quotethe_digital_dentist I have nothing more to say on the subject of networking. You didn't have anything to say in the first place except made up nonsense. Or did you have an explanation of how my networked printer printing from an sd card is unreliable?by Koko76 - General
Re: SmoothieBoard Users - 8 years ago
I print directly from an SD card all the time, and monitor it via the web interface. There is no "Host computer" in this scenario. Looks like and works similar to pronterface, but specifically without the disadvantages you keep mentioning. Upload files to the card via the web interface without swapping around cards and micro sd adapters. Turn off the computer, printer keeps going. Network goby Koko76 - General
Re: Help me with FW e SW Delta printer - 8 years ago
See this thread and the links it provides Short answer though is that although it can be done, it imposes a lot of limits on build volume.by Koko76 - Firmware - mainstream and related support
Re: SmoothieBoard Users - 8 years ago
I'm not advocating pronterface, what I'm advocating is different and better. Perhaps if you had experience with what you are talking about you might have a different opinion. I bought and used both boards. Have you, or are you just speculating?by Koko76 - General
Re: SmoothieBoard Users - 8 years ago
File upload without removing the sd card and resetting the machine. Web interface better than pronterface and works over Ethernet.by Koko76 - General
Re: SmoothieBoard Users - 8 years ago
Neither board will run three extruders without some add on, the smoothie 5x and Duet .85 will run two. The Duet has a separate expansion board, while you have to "roll your own" solution with the smoothie as far as adding another stepper driver. I do wish I chose the Duet over the Smoothie, I find that the software side of the Duet is far more responsive to user feedback than the Smoothie.by Koko76 - General
Re: SmoothieBoard Users - 8 years ago
I'll say it before Dc42 does, but consider the Duet as well. Better network features, and I personally find it easier to configure. I've had the odd software issue with both the smoothie and the duet, but that's kind of to be expected for a small open source software driven project with little money devoted to testing and such. For hardware features alone it's worth the difference (IMHO).by Koko76 - General
Re: This engineer claims 100 grams direct extruder. I want one - 8 years ago
Quote I want to redesign the E3D to a radial fan and smaller heatsink anyway though. I got down to 15mm tall for that part (enough to fit the throat) by making it a water block, which is also part of the extruder assembly. After getting everything prototyped I'll split the block so that only the lower part is aluminum and seal with a delrin block which becomes the cycloid gearbox. I had initiaby Koko76 - General
Re: This engineer claims 100 grams direct extruder. I want one - 8 years ago
Quoterealthor QuoteKoko76 I have "the means" to machine it. Those parts are unsuitable to be made with general 3d printers available today in order to have the claimed "zero backlash". That is indeed lucky of you. I will be following with great interest your project should you be documenting it online. I might have the "luxury" to get the parts machined in my home country for a beer but here inby Koko76 - General
Re: This engineer claims 100 grams direct extruder. I want one - 8 years ago
Quoterealthor QuoteKoko76 Once I've worked through a few things a cycloid is going to be built and integrated into the block I'm currently using as a heatsink and extruder. Cycloid will be in the 9-15 to 1 range I think. Will you be printing the cycloid or do you have the means to machine it. It shouldn't be complicated to machine the real challenge is to get access to a machine and somebody wiby Koko76 - General
Re: This engineer claims 100 grams direct extruder. I want one - 8 years ago
Quoten8bot I do have a shorter nema11, also with a 5:1, but the gearbox had a rough spot in it and the motor would stall at that point, even at full current. It likely would work marginally well, but probably not since it hiccupped on the rough spot on the gearbox with a .4mm nozzle. with a .25mm nozzle it might not be great, as this longer one is borderline for .25mm nozzle. The main reason forby Koko76 - General
Re: Bowden vs direct setup - 8 years ago
My printer build is not typical. I have zero concerns hanging one direct drive unit on it and very few concerns about going to dual extrusion soon too. No change was made to motor drive voltage. Everyone's mileage will vary depending on their setup.by Koko76 - General
Re: Bowden vs direct setup - 8 years ago
Just got finished swapping my delta to a direct setup, couldn't be happier and won't consider Bowden again.by Koko76 - General
Re: [RAMPS] DRV8825 drivers instantly dying - 8 years ago
Look to what is downstream of the driver, as you have replaced everything upstream. The two things left are wires and motor. Bad or intermittent connections to a stepper motor can cause some drivers to blow. You can try and check the cabling by connecting a multimeter to a phase of the motor. You will read resistance, then wiggle the cable around and watch the meter. If it moves you might haby Koko76 - General
Re: MFA Tube Max Temperature - 8 years ago
Quotethe_digital_dentist I may be wrong, but I don't think it's normal practice for the Bowden tube to go all the way down to the nozzle. In the lite version it does, they have drawings online.by Koko76 - General
Re: New RepRapFirmware 1.09r-dc42 - 8 years ago
No wireshark (not sure what that is) but: Used output buffers 4 of 16 Memory static ram 39856 dynamic ram 40912 recycled dynamic ram 1152 current stack ram 2984 max stack ram used 4264 never used 12120 error status 1 free file 9 longest block write time 616.6ms slowesrt main loop .617249; fastest 0.000122 this is from a second machine connected to the web interface when upload "finished" at 1by Koko76 - Firmware - mainstream and related support
Re: Electrical Upgrades - 8 years ago
Quotelouiebeck We are in the process of replacing all the two-pronged Receptacles in our home to GFCI receptacles. How do I install a ground wire if there isn't one already? I understand the ground wire is brass and goes to the green screw. Do we merely attach it to the metal box? I know this is a do it yourself project. The estimate from an electrician was $500 for 10 boxes. Pretty steep. ______by Koko76 - General
Re: Can we melt PLA pellets to use it for molding? Maybe microwave it? - 8 years ago
Again, my suggestion is that you research injection molding techniques and methods as there is a wealth of knowledge built over decades. Or you could just watch YouTube and dismiss what I said. Terribly sorry to spoil your thread with actual experience in doing what you are talking about, I won't chime in any further in your threads.by Koko76 - General
Re: Can we melt PLA pellets to use it for molding? Maybe microwave it? - 8 years ago
If molding plastic were as simple as you seem to think it is, of what use is the decades old, proven process of injection molding for? Sometimes (most times) people in the past aren't stupid morons who do things because they like more work for less return. Might be worth reading and trying to understand what and why they did what they did before perpetually inventing "problems" to find "solutioby Koko76 - General