Cherry Pi II Released April 13, 2014 01:16PM |
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Re: Cherry Pi II Released April 13, 2014 03:46PM |
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Re: Cherry Pi II Released April 13, 2014 06:11PM |
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Re: Cherry Pi II Released April 13, 2014 07:27PM |
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Re: Cherry Pi II Released April 13, 2014 08:09PM |
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AndyCart
I'm sure someone much brighter than me will find a way and then ...
Cherry Pi III
Re: Cherry Pi II Released April 14, 2014 01:41AM |
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3DRapidClone
By switching to a heated build chamber! I am interested in this proposed kit of yours! Would want to scale it up a bit. Do you like the magnetic effectors much more than the traxxas u-joint alternatives?
Re: Cherry Pi II Released April 14, 2014 01:51AM |
Registered: 10 years ago Posts: 515 |
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vreihen
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AndyCart
I'm sure someone much brighter than me will find a way and then ...
Cherry Pi III
I'm putting my money on you figuring it out before they do. Would the sensors read properly if you bonded standoffs to the glass, attached the heatbed to the standoffs with a cork insulator below, and stacked a second piece of glass on top as your heated print surface? I would think that it should be an adequate thermal break, if overheating the sensors is the concern.....
Re: Cherry Pi II Released April 14, 2014 03:41AM |
Registered: 10 years ago Posts: 1,381 |
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AndyCart
A guy called Wing on there has done a fantastic job producing some code for a tiny arduino board that sorts out the major problem with FSR which is balancing the don't trigger with the weight of the bed/trigger when required without too much force from the hotend issue.
Re: Cherry Pi II Released April 14, 2014 06:53PM |
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Re: Cherry Pi II Released April 15, 2014 02:04PM |
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Re: Cherry Pi II Released April 15, 2014 03:14PM |
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Re: Cherry Pi II Released April 15, 2014 03:24PM |
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RichRap's blog
I get asked a lot about building Bigger Delta printers. - Going higher is not a mystery you just extend everything taller. Going wider in X and Y is also quite easy, you just need to also extend the print arms. General relation in size of these arms is the horizontal distance between the vertical posts x 0.8
Eg - If you had a measurement of 600mm between two of the three posts a good arm length would be 600x0.8 = 480mm eye to eye.
If you make the arms longer you can print more outside of the vertical posts, That gets interesting when you have a really big platform because you have much more space to potentially use outside of the vertical posts, but it also uses up more vertical space with longer arms than you really need. Also be careful not to hit into these posts if you print very big things, most firmwares are dumb and do not know that you have vertical posts in the way of the printer's build envelope.
Re: Cherry Pi II Released April 15, 2014 05:19PM |
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Re: Cherry Pi II Released April 15, 2014 06:33PM |
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3DRapidClone
How did you figure out your custom Delta rod length? I am definitely interested in your kit though. Can you cut custom lengths of aluminum tubing for you kit?
Re: Cherry Pi II Released April 15, 2014 06:41PM |
Registered: 10 years ago Posts: 515 |
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ybanrab
The printer looks great Andy. I'm currently designing a delta printer which shares several characteristics with the Cherry Pi and I was just in the process of re-designing my base to contain all the electronics too. If I understand correctly, the second revision has become slightly shorter and wider. Is that down to stability issues or down to a desired print shape?
I'm also using the 250mm mirror as a print surface, but currently have 750mm extruded aluminium uprights.
Re: Cherry Pi II Released April 15, 2014 10:37PM |
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Re: Cherry Pi II Released April 17, 2014 04:58PM |
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Re: Cherry Pi II Released April 17, 2014 07:24PM |
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Re: Cherry Pi II Released April 17, 2014 08:11PM |
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RickM
I finally got all the parts (and finally got hold of someones pillar drill!) but havn't had time.
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AndyCart
I played around with some printed sliders but didn't have much luck. They ran on the extrusion very smoothly but due to the position of the GT2 belt they kept jamming when run from the steppers. The angles were all wrong.
Re: Cherry Pi II Released April 18, 2014 02:34AM |
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Re: Cherry Pi II Released April 18, 2014 02:54AM |
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Re: Cherry Pi II Released April 18, 2014 03:29AM |
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Re: Cherry Pi II Released April 18, 2014 05:49AM |
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Re: Cherry Pi II Released April 18, 2014 08:22AM |
Registered: 10 years ago Posts: 553 |
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AndyCart
Here are some images, and the .stl files for anyone interested in pursuing the printed tower slides idea. I've also attached my Sketchup design file.
You can see in the image below the UHMW tape I used on the edge of the slide to reduce friction. These actually worked very well but the belt geometry was all wrong on my machine. With a little work these could be a cheap way to go. I'm too busy with other stuff to pursue it at the moment though.
The nuts traps are to allow two M3 10mm screws to be used on each of the 3 adjustable sliders.
[attachment 31016 PrintedSlides2.jpg]
[attachment 31017 PrintedSlides1.jpg ]
These were printed on CP II at 120mm/sec as they were just prototypes. I need to work out what retraction to use at this speed as I seem to be getting atrefacts on the side walls. None evident at more normal speeds. I usually print 'good stuff' at 40mm/S.
Andy
Re: Cherry Pi II Released April 18, 2014 12:04PM |
Registered: 10 years ago Posts: 515 |
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gmh39
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AndyCart
Here are some images, and the .stl files for anyone interested in pursuing the printed tower slides idea. I've also attached my Sketchup design file.
You can see in the image below the UHMW tape I used on the edge of the slide to reduce friction. These actually worked very well but the belt geometry was all wrong on my machine. With a little work these could be a cheap way to go. I'm too busy with other stuff to pursue it at the moment though.
The nuts traps are to allow two M3 10mm screws to be used on each of the 3 adjustable sliders.
[attachment 31016 PrintedSlides2.jpg]
[attachment 31017 PrintedSlides1.jpg ]
These were printed on CP II at 120mm/sec as they were just prototypes. I need to work out what retraction to use at this speed as I seem to be getting atrefacts on the side walls. None evident at more normal speeds. I usually print 'good stuff' at 40mm/S.
Andy
Im putting the final touches on my own version of a printed slider, but with an integrated carriage. I am curious though, wouldn't having the side-to-side adjustablilty for the slider only on one side cause it to become off center as it wears?
Also, great idea with the motor screw holes. I dont know why they were not used in the original Kossel.
Re: Cherry Pi II Released April 18, 2014 02:22PM |
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Re: Cherry Pi II Released April 22, 2014 05:19PM |
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Re: Cherry Pi II Released April 23, 2014 06:52AM |
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DeltaDroid
Hi Andy, is there any chance you or anyone else who's reading this could modify this Rostock mini carriage to mount flush on this V Wheel Carriage from your Cherry Pi II? Here are the CAD files for the Rostock carriage.
Cheers!
Neil
Re: Cherry Pi II Released May 20, 2014 12:27AM |
Registered: 9 years ago Posts: 113 |
Re: Cherry Pi II Released May 20, 2014 05:33PM |
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