Best Printer to Build from Scratch 2015 April 23, 2015 06:16AM |
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Re: Best Printer to Build from Scratch 2015 April 23, 2015 04:35PM |
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Re: Best Printer to Build from Scratch 2015 April 23, 2015 05:08PM |
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David J
Delta printers are fascinating to watch... they can also be a challenge to set up as they are harder to understand that the traditional Cartesian printer, with every motor moving when the effector moves. This can also be a challenge for the controller board, and they work best with a modern 32-bit board. They can be very quick. If you're wondering, I've just finished making one, and trying to iron out the final bugs.
Re: Best Printer to Build from Scratch 2015 April 23, 2015 05:18PM |
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dc42
Delta printers have other advantages besides speed - for example, a smaller footprint for the same build area compared to Cartesian (but greater height). Also, the fixed bed of a delta makes it easier to use FSRs for Z probing, and makes it safer to use a mains-powered bed heater.
Re: Best Printer to Build from Scratch 2015 April 23, 2015 06:05PM |
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dc42
I may be accused of blowing my own trumpet, but a delta printer using Duet electronics with my firmware fork and a reliable Z probe is trivial to set up, because of the fast autocalibration function. The build still needs to be accurate in some respects; for example the diagonal rods must all be the same length as accurately as possible, and backlash in the joints must be minimised.
Delta printers have other advantages besides speed - for example, a smaller footprint for the same build area compared to Cartesian (but greater height). Also, the fixed bed of a delta makes it easier to use FSRs for Z probing, and makes it safer to use a mains-powered bed heater.
I can't comment on CoreXY as I have yet to build one.
Re: Best Printer to Build from Scratch 2015 April 23, 2015 07:10PM |
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Dave_robinson_022
What are you using at the moment if you don't mind me asking?
Re: Best Printer to Build from Scratch 2015 April 23, 2015 07:33PM |
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dc42
The second started out as a Mini Kossel built from a kit. I converted it to Duet electronics (also described in my blog) and added the colour touch screen control panel. I found it better than the Ormerod in most respects, except that it was single extruder and has a smaller build area. So I have recently increased the build area to more than 300mm diameter by using longer horizontal extrusions and fitting a 350W mains-powered heated bed.
It is printing well, but I have just ordered some 1m vertical extrusions so that I can increase the build height. After that, I intend to convert it to dual extrusion, using the E3D Chimera or Cyclops hot end.
Re: Best Printer to Build from Scratch 2015 April 24, 2015 12:30AM |
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Re: Best Printer to Build from Scratch 2015 April 24, 2015 04:55AM |
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Dave_robinson_022
Will you be adding the upgrades to your blog?
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Dave_robinson_022
Kossel Mini uses openbeam which is 15mm x 15mm isn't it? Is this still ok at larger size or will you look to move to a 2020 extrusion?
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Dave_robinson_022
Also, I have noticed issues with airflow (drafts etc) around the Ultimaker at work so I was considering an enclosure; it occurs to me that if I fix the frame to a larger enclosure then this would improve stability and rigidity?
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Dave_robinson_022
The only other issue I have is availability of some parts; moving from the UK where I had easy access to anything I needed for building things to NZ has been a bit of a shock in that respect. I was however considering a heated mat on aluminium with a PEI sheet for a heated bed as I was hoping to ho bigger than the 200x200mm PCB Heated beds anyway. What are your thoughts on this?
Re: Best Printer to Build from Scratch 2015 April 25, 2015 06:29PM |
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dc42
Probably, I have a draft entry already, just need to get around to finishing it.
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dc42
The only way I managed to print the frame motor mounts in ABS for my Midi Kossel conversion on the Mini Kossel was to put a couple of plastic bags over the whole printer to increase the temperature around the print. So an enclosure is high on my list of priorities too. Whether it will hep with rigidity or not will depend on what it is made from. I am not planning to make the enclosure structural, I'm thinking of drop-in acrylic or polycarbonate panels, double skinned if necessary for thermal insulation.
Re: Best Printer to Build from Scratch 2015 April 25, 2015 06:42PM |
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Re: Best Printer to Build from Scratch 2015 May 01, 2015 01:15AM |
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