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Rostock, Kossel, Simpson, 3DR, and more. See: http://reprap.org/wiki/Category:Delta. Previously named "Delta Robots and Stewart Platform"
Re: Delta sizing? - 8 years ago
Go for width of the bed plus 10%-20% depending on how important z printable height is to you. There's less to lose with slightly longer arms than with slightly short. I went 330 then changed to 360mm.by DjDemonD - Delta Machines
Re: incorrect height - 8 years ago
No worries, deltas take a bit more thought than straight cartesian or even corexy, as they require 3 motors linked to work, whereas corexy has 2 motors linked and straight cartesian has none.by DjDemonD - Delta Machines
Re: DemonDeltaTube - A delta inside an acrylic tube... Build - 8 years ago
It's a sample from a supplier we are hoping to stock them soon.by DjDemonD - Delta Machines
Re: DemonDeltaTube - A delta inside an acrylic tube... Build - 8 years ago
No I've tried in the past you have to cover it in abs juice or hairspray or similar and it gets scratched up. It's a shame since it's so nice but I will probably use AndOrNot bed surface as its quite reliable and cheap.by DjDemonD - Delta Machines
Re: DemonDeltaTube - A delta inside an acrylic tube... Build - 8 years ago
Just got my bed. It was from an eBay seller in Germany, nice to be able to get a circular piece and not have to take it to be machined: Which appears to be an aluminium/magnesium alloy. Very flat despite listing stating tolerance of 0.5mm. So might have all the parts together now. The other side is even more beautiful. Seems a shame to stick a silicone heater and a PEI surface to it. Butby DjDemonD - Delta Machines
Re: incorrect height - 8 years ago
So calculate the steps/mm (xyz all the same) you need to get the z right. Then start adjusting diagonal rod and delta radius.by DjDemonD - Delta Machines
Re: DemonDeltaTube - A delta inside an acrylic tube... Build - 8 years ago
Okay, so some progress. I fitted the new design effector and the rods. I was getting a lot of false triggers with the piezo sensor until I tightened down the four screws holding the upper and lower parts of the sensor assembly, and set a temporary 20mm/s2 acceleration during probing. I'm using a modest deafult max acceleration of X500 Y500 Z100 currently but these can be increased later. Initby DjDemonD - Delta Machines
Re: incorrect height - 8 years ago
Its just a way to help calculate the correct steps/mm value. You can adjust it so if its 98 now and the objects are consistently 40/40.6 in size then do 98x(40/40.6) = 96.55 and use that value for #define XYZ_Steps Then recalibrate and try some 20mm and 40mm tall objects again.by DjDemonD - Delta Machines
Re: Precision Piezo Z-probe Now available. - 8 years ago
Sweet! I hadn't seen this I love a bit of mechanical stress.by DjDemonD - General
Re: incorrect height - 8 years ago
This guide is intended for Duet users but read the first part about getting your delta working right.by DjDemonD - Delta Machines
Re: DC Barrel Jacks - 8 years ago
Laptop barrel jacks rarely have to take high current as laptops are often 19v or higher, so the current is usually 3-5A at most.by DjDemonD - General
Re: incorrect height - 8 years ago
I haven't really time to check through it all, but if the 40mm cube is proportionally larger still than the 20mm cube change steps/mm for xyz as your have shown above: #define DEFAULT_AXIS_STEPS_PER_UNIT { XYZ_STEPS, XYZ_STEPS, XYZ_STEPS, 95 } then recalibrate. Seriously try the least squares you can calibrate your machine with one set of probe point heights. It amazes me that anyone would useby DjDemonD - Delta Machines
Re: incorrect height - 8 years ago
Oh yes, I don't mean reduce the steps per mm for Z only. Reduce all the steps/mm for x,y and z by the same amount. If you think about it when the effector moves up or down purely Z only, all that happens is all three motors turn by the same amount. So to position your nozzle at z=40 all 3 motors must move the carriages by 40mm exactly. However when you move in X and Y then the effect of loweringby DjDemonD - Delta Machines
Re: incorrect height - 8 years ago
First fine tune your extruder calibration, print objects to get the exact extrusion amount, a slightly rough top layer can add 0.3mm easily. Overextruding by a tiny amount can add 0.3mm. Once you've done that, you need to print 2 cubes but different heights. Print 1 cube 20x20x20 Print another next to it 20x20x40 Now if they are both 0.3 too high so 20.3 and 40.3 then the issue is with first lby DjDemonD - Delta Machines
Re: Delta Segments per Second - 8 years ago
Yeah I'm not sure segments per second will affect printer speed. 8bit marlin can work with deltas as long as you want modest speed. My microdelta uses Rich Cattels marlin from 3 years ago and works fine (and quietly) at 1/32 microstepping on lv8729 drivers with 1.8 deg motors. It only has a 90mm bed. My XL runs duetwifi and happily moves at 400mm/s using 1/16th and 0.9deg motors. This would notby DjDemonD - Delta Machines
Re: Tiny Coffeemug Delta w. Mag-rods [WiP] - 8 years ago
I've a pile of A4988s if you want a few. Looks great thats quite good acceleration and speed for such a small machine. Stir your coffee why not, how about programming it to sign your name too.by DjDemonD - Delta Machines
Re: Things you should buy when starting with a 3D-Printer... 
- 8 years ago
Ah okay I meant the woven stainless steel glove - that would be much less suitable for changing your hotend. I use fireproof gloves to do "hot swaps", and the kevlar gloves when trimming models.by DjDemonD - General
Re: Things you should buy when starting with a 3D-Printer... - 8 years ago
Not for tightening your hotend!by DjDemonD - General
Re: Things you should buy when starting with a 3D-Printer... - 8 years ago
If we're talking safety gear then kevlar gloves come highly recommended. Brand new craft knife cannot cut them. Use when getting parts off the bed or trimming them.by DjDemonD - General
Re: DemonDeltaTube - A delta inside an acrylic tube... Build - 8 years ago
The rigid couplers are working on 2 of the towers, on one the motor is wobbling a little as it turns so something is slightly less well aligned. I'd quickly tweak it but nothing is easy to get at on this machine, especially the grubs screws on the couplers. That being said it seems that flexible couplers are not required if the axis is precise and the leadscrews are straight. In my design thereby DjDemonD - Delta Machines
Re: Things you should buy when starting with a 3D-Printer... - 8 years ago
I barely know how to use it but every now and again it comes in very handy. I didn't buy a lab sized one just a pocket scope.by DjDemonD - General
Re: Things you should buy when starting with a 3D-Printer... - 8 years ago
I was pleasantly surprised with my cr10 it came with wire cutters, cable ties, hex/allen keys the good ones with ball ends at one end, a nice sharp scraper, a memory card that actually works, a USB card reader and a decent shielded USB cable. Since I located the machine in a bit of spare space at work and all my other 3d printer stuff is at home, I can safely say that's all you need to print someby DjDemonD - General
Re: DemonDeltaTube - A delta inside an acrylic tube... Build - 8 years ago
On this build as I have designed it, its the carriages and the bearings for the lower end of the leadscrews. Would be more usable space with belts. The effector could be is the carriages we're and rods spacing was lower, but using the 55mm rod spacing might enable me to swap my smart effector onto this machine, and this effector onto my Xl. I've made it as small as that rod spacing easily allowsby DjDemonD - Delta Machines
Re: Tiny Coffeemug Delta w. Mag-rods [WiP] - 8 years ago
Looks great, really keen to see the hotend.by DjDemonD - Delta Machines
Re: DemonDeltaTube - A delta inside an acrylic tube... Build - 8 years ago
So effector installed and piezo z probe. Probe needs some dampening as leadscrews generate more mechanical noise than belts. But it's moving around, I haven't yet had time to check how much the effector is tilting as I move around the bed. One thing I would say, when I've enclosed machines, they become much harder to access. But they're built by that point. When you begin your build in an encloby DjDemonD - Delta Machines
Re: DemonDeltaTube - A delta inside an acrylic tube... Build - 8 years ago
Well yes that might make sense, but if you measure your ballstuds they actually vary in size a fact Haydn has apologised about. There was a thread on this on duet forum. So to test the theory I took my 360mm delrin rods to a local engineering firm and got them to measure them accurately using the ball bearing method. I then measured the ball studs as best I could, but determining the exact posby DjDemonD - Delta Machines
Re: DemonDeltaTube - A delta inside an acrylic tube... Build - 8 years ago
Quoteo_lampe I'd think that excessive resin would disappear in the hollow carbon rod, which is the path of lowest resistance. Maybe it'd help to glue only one side at a time and hang them up, so the resin runs down the rod. I was surprised about your printed rod -jig, since it must have taken some time and lots of filament. BTW what did you mean with, you "have the right bearings to measure theby DjDemonD - Delta Machines
Re: DemonDeltaTube - A delta inside an acrylic tube... Build - 8 years ago
That looks great, no not touched a nerve as such, I just didn't think an object that could fit diagonally on a "nominal" 200x200 bed would be that much of an ask to print. I have to remember having got very used to being able to reliably print across the whole bed every time (due to use of very accurate nozzle contact probes - Precision Piezo and Duet3D Smart Effector, and RRF) that not everyoneby DjDemonD - Delta Machines
Re: Large Kossel all metal delta build log - 8 years ago
Thanks but not much is going to change here this machine is a dependable working unit now, my go to machine for 90% of my printing. Now I've moved on to the slightly more unusualby DjDemonD - Delta Machines
Re: DemonDeltaTube - A delta inside an acrylic tube... Build - 8 years ago
Its alive! The rods don't foul the effector so very pleased with that. Now the real work of tuning and tweaking begins. Looking forward to trying to print on varied surfaces with the open base. Might need to design a handle to lift the machine easily and some sort of cover for the psu and controller.by DjDemonD - Delta Machines