Thread: looking for a good 3d printer
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07-08-2017 #101
It was moving at 10mm/s because that is the loudest it is going to be causing the most vibrations, are you saying you preferred the noisier DRV8825 compared to the TMC2100?
You are completely missing the point, that video was only intended to display the noise difference between the two drivers, nothing else. Yes i did dismiss belt driven printers for specific applications, you dismissed Ballscrews for all 3D Printers but actually they are required for specific applications - as i stated before, if you are printing in materials such as Nylon or Polycarbonate, you need to have a bed temperature of 120c+, and almost certainly need the printer in an enclosure to maintain the correct ambient temperature.
Now if you try and print a large object, where the first layers are going to be printed very slowly, the toolhead and the belts connected to it would be exposed to high ambient temperatures from the Heatbed, these will cause standard rubber belts to distort, i've seen it happen. Maybe you could get some steel belts or whatever, but whats the point when ballscrews are so cheap and offer far superior performance.
Look im sorry, but go and do some research, LARGE 3D Printers, depending on their architecture, will print at an acceptable quality from 40 - 60mm/s. Now if im printing a full size object on my printer (400 x 400 x 400mm), at a high resoluton maybe 150 - 250microns it will take 40+ Hours, thats standard - not a big deal.
For just one example, check out this video, i have set it to start just before he tells you how long it took to print - Just under 100 Hours.
Thanks
Alex
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07-08-2017 #102
I've got to admit, people who claim microstepping increases accuracy, are one of my pet hates.
The term you're probably looking for is gearing or scaling. With modern drives, there's a lot of internal scaling going on. The input simply tells the drive the distance you want the motor to move, be that a 256th microstep, or a full step. The drive then takes that, and runs it through however many switching phases it takes to move to that position, which in itself will depend on the speed things are moving at, as once you increase speed, the benefits of microstepping diminish, so the number of switching phases is usually reduced to ensure maximum motor performance (often called morphing).Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
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09-08-2017 #103
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12-08-2017 #104
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12-08-2017 #105
Of course I'd prefer a silent driver.
OK.
That's nonsense.
Originally Posted by What I said was:
OK
I don't plan to start and industry... so it is not relevant for me and don't have time to watch, and I believe most DIY 3D printer builders/users never print anything that takes 100 hours and never use or build a LARGE 3D printer anyway.Last edited by A_Camera; 12-08-2017 at 03:15 PM.
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12-08-2017 #106
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12-08-2017 #107
Quality is NOT improved if you are micro stepping a stepper motor at 1/256, that is a total misunderstanding. Also, you don't need to microstep at 1/256 to make it silent and even running, that largely depends on the quality of the driver, as well as the mechanical quality of the printer or router.
OK, so I was wrong, there exists 1616 ball screws. Anyway, I don't think it is a good idea to use them because the 16mm pitch is just too much in my opinion. I would prefer something with MUCH less pitch.
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12-08-2017 #108
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13-08-2017 #109Cool. Have you printed anything? Are you happy with it? What's your impressions so far?
tightening them has solved the layer shift but Im still getting 1mm variation on the bed calibration. guys on the forum think it is the micro switch but it seems to work fine when I tested it with a meter.
I think it will be a good machine but needs a few tweeks and lots of wear, the previous owners must have used it a lot.
biggest issues that i missed when researching are the bowden extruder and being stuck with the wanhao maker slicer program. (firm ware upgrades to 3d partry but not brave enough to try)Last edited by Ross77; 13-08-2017 at 01:54 AM.
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13-08-2017 #110
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