Re: Grounded Experimental Delta Printer
Looking better! How do you plan on homing it? EDIT : You might be able to home it by having a small hole in an identical spot on all three wheels. Use a through beam sensor to detect the hole.
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I forgot to add that to my todo list. I have a few ideas. I think I will use your idea. Instead of a hole, I will make a slot. During homing each arm with travel to the light/dark interface. You can...
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... instead of homing you could use some high-res encoding data on the disks, so after power up the actual absolute position can be read by rotating the disks until the nearest encoding raster is...
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Interesting! For Homing on Morgan I use a small magnet inserted into a hole in the disk, with a digital hall effect sensor as limit switch. Because the magnet moves sideways, the switching range of...
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Re: Grounded Experimental Delta Printer
Here it is complete with hall effect sensors, extruder, adjustable heated bed, string, bolts, and nuts. All I have left to do is pick a filament drive and make a nice package that includes the power...
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have you looked at kossels fishing lines pullys and the ideas behind? [www.youtube.com] the lines are fixed with screws on the wheel and doesn't depend on friction for driving the wheels
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I wonder about the math required for your coordinate transformations. It will not be the simple math that rostock/kossel builds get to use. I'm willing to take a stab at it if you want.
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Hah. Couldn't stop thinking about it so I did the math. You may have some trouble with the speed of the controller, because the coordinate transformation takes some heavy lifting as far as the math...
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VDX Wrote: ------------------------------------------------------- > ... instead of homing you could use some high-res > encoding data on the disks, so after power up the > actual absolute...
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ShadowRam Wrote: ------------------------------------------------------- > This will give you absolute encoding to any > resolution you want can afford without the need for encoded > disks or...
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Above you guys can see that I will use cheapo hall effect homing. There will be no need for a full feedback loop. I like the idea of using the encoded desk or potentiometer but I am opting for the...
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nicholas.seward Wrote: ------------------------------------------------------- > Above you guys can see that I will use cheapo hall > effect homing. There will be no need for a full >...
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Annirak Wrote: ------------------------------------------------------- > ShadowRam Wrote: > -------------------------------------------------- > ----- > > This will give you absolute...
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> That makes sense. Failure-resistant sensing > methods are definitely better and a magnet + hall > sensor is a good step in that direction. I would > ask, though, what kind of precision...
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As Nicholas just stated, accuracy is not important any more. That is the beauty of electronic adjustment. It frankly does not matter where the switch is, as long as the repeatability is good. Then you...
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Re: Grounded Experimental Delta Printer
Gerard Choinka Wrote: ------------------------------------------------------- > have you looked at kossels fishing lines pullys > and the ideas behind? > [www.youtube.com] > the lines are...
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Re: Grounded Experimental Delta Printer
Annirak Wrote: ------------------------------------------------------- > Hah. Couldn't stop thinking about it so I did the > math. You may have some trouble with the speed of > the...
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nicholas.seward Wrote: ------------------------------------------------------- > I haven't gone through to check your math but the > geometry that I picked has the ability to greatly >...
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@Annirak: I agree whole-heatedly with the idea that math should be second to rigidity. However, I like how much easier the math is if all the arms connect on one plane. (I also think people will be...
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New video The 100% safe work envelope has been downgraded to 6x6x4.5". You can go much higher and much wider but you have to be careful that the wheels don't hit the part. I might need to write a...
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