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Re: Interest in saving effort by sharing gcode? - 8 years ago

Are you aiming for drag-and-drop printing? No messing with slicing settings?

by n8bot - General

Re: Possible bug in elasticity compensation when extremely low values are used - 8 years ago

Thanks. BTW I'm using Simplify3D to slice; I'm not sure if the problem is present with other slicers' gcode.

by n8bot - Duet

Re: Possible bug in elasticity compensation when extremely low values are used - 8 years ago

Here are some photos. Near the top, where the real drastic effects take place, is where I changed the S value from about 0.03 to about 0.01. Most of the print was done with some value, but it wasn't until I decreased it further that the real problems started.

by n8bot - Duet

Possible bug in elasticity compensation when extremely low values are used - 8 years ago

Hello, So I really like the elasticity compensation, even with direct drive extruders. One problem I've encountered, though, is when using very small values, it causes the x/y movement to either attempt a crazy move and stall, or make a z move, and loses registration. It seems like it could be related to some extruder moves, but I've not investigated thoroughly when it is happening in the gcode.

by n8bot - Duet

Re: This is why you should not adapt single perimeter wall thickness by changing the extrusion / flow rate - 8 years ago

It was not clear at first that your first diagram showed the cross section of a single extrusion, but after I realized that it completely makes sense. Another great argument for small layer heights.

by n8bot - General

Re: PVA filament stained print - 8 years ago

Would you say the bottom layers that contacted the PVA had just as good of surface finish as the top layers?

by n8bot - General

Re: Preferred Z Axis Style? - 8 years ago

QuoteOrigamib For most applications, screws are the way forward. I've never been keen on the belts method as it can't hold its own weight, and belts tend to wear faster. Belts are much better for high speed applications, but the Z Axis will never have to move that fast. A leadscrew is the way to go. I'm not even sure why people go for belts, as surely a length of GT2 belt and pulleys costs just a

by n8bot - CoreXY Machines

Re: criss-cross pattern needed? - 8 years ago

QuoteFrankPropaneTank Not quite, if memory serves this is the MarkForged Mark 1 belt system: Right. Kinematics are the same, no? The belt path is just slightly different. Oh I see the confusion. I was referring to the original proposal diagram being similar to the markforged, not the single-belt hbot (not familiar with this)

by n8bot - CoreXY Machines

Re: Retro Fitting Stratasys 3D Printer - 8 years ago

QuoteBAMFKaleb QuoteBAMFKaleb Quotedc42 The Hall effect endstop switches should be compatible with the Duet even if they need 5V, because they usually have open-drain outputs. They may even be 3.3v Hall switches, seeing that the PSU system provided 3.3V. If you can find a component part number on the Hall switches, we can look up the datasheet and see if they need 3.3V or 5V. Or you can just try

by n8bot - General

Re: criss-cross pattern needed? - 8 years ago

QuotePvtPrivate Quoten8bot QuoteMikk36 One flaw that I see with your design is that as you tighten the X belt you will put a constant sideways (tilting) load on the X axis and with that on the Y movement system creating additional resistance and wear. This could be mitigated by having the Y motor also drive the left side of the X axis (through a shaft, for example, think Ultimaker) or having anot

by n8bot - CoreXY Machines

Re: criss-cross pattern needed? - 8 years ago

QuoteMikk36 One flaw that I see with your design is that as you tighten the X belt you will put a constant sideways (tilting) load on the X axis and with that on the Y movement system creating additional resistance and wear. This could be mitigated by having the Y motor also drive the left side of the X axis (through a shaft, for example, think Ultimaker) or having another motor there. There is

by n8bot - CoreXY Machines

Re: I'm pretty sure I'm going to die because of how good this print turned out. - 8 years ago

Quotedeckingman Just out of curiosity, what size is the print? Is it 1:1 scale? Also, what size are the stl and gcode files? Yes, 1:1 scale. It's hard to measure the shape exactly, but the foot print in x/y was about 250mm total. The STL (OBJ actually) is 580 MB, the gcdoe file was just under 500 MB. I think I mentioned elsewhere that the gcdoe file was 1 GB, but that was when I sliced it at 40

by n8bot - Reprappers

Re: I'm pretty sure I'm going to die because of how good this print turned out. - 8 years ago

Yes I will be using square profile linear guides from misumi for all my axes on the cartesian.

by n8bot - Reprappers

Re: I'm pretty sure I'm going to die because of how good this print turned out. - 8 years ago

QuoteGovahnator I am impressed man, good job! What do you have in mind for your cartesian that would make it better then your Delta? I am currently finishing my custom mendelmax 1.5 , need to take a new photo though, its no longer up to date. Thank you! The main things for the new cartesian are: increased rigidity, increased resolution, linear resolution (vs the dynamic resolution of a delta),

by n8bot - Reprappers

Re: PVA filament stained print - 8 years ago

Thanks for the heads up. Got any pics? I'm going to buy a few different brands and compare.

by n8bot - General

Re: 32bit control electronics - 8 years ago

Quotethe_digital_dentist Quoten8botDuet is my choice. Smoothieboards are good for mad scientists making evil science fair projects, but pretty bad at conveniently running a printer with all the features you'd expect. I run my printer very conveniently (at least it seems that way to me) using a smoothieboard. What sort of features should I be expecting that aren't there? Which controller offers

by n8bot - Reprappers

Re: 32bit control electronics - 8 years ago

Duet is my choice. Smoothieboards are good for mad scientists making evil science fair projects, but pretty bad at conveniently running a printer with all the features you'd expect.

by n8bot - Reprappers

Re: I'm pretty sure I'm going to die because of how good this print turned out. - 8 years ago

Actually, some changes you had already made a few weeks back allowed me to print this with only 58 or so underruns, which was good compared to the tests I did before updating the firmware. Right now, the limitation is not the firmware at all, but the mechanics of my delta (with the stepper on the effector). I could probably go higher, but things start to get hairy... That said, I might try the ne

by n8bot - Reprappers

Re: I'm pretty sure I'm going to die because of how good this print turned out. - 8 years ago

I'm not sure if that was spam, or an honest suggestion, but no thanks. I design and build my own printers. That's the fun part.

by n8bot - Reprappers

Re: I'm pretty sure I'm going to die because of how good this print turned out. - 8 years ago

Pretty soon I would like to have a small print farm where I can employ people so that there is somebody "around" 24 hours during printing.

by n8bot - Reprappers

Re: I'm pretty sure I'm going to die because of how good this print turned out. - 8 years ago

Thanks for the positive comments. Why can't you trust your printer? I have admittedly had a few failures, but I've slowly figured out how to work out those wrinkles. The important part is being able to be near the printer for so long. I do go out on occasion, but only with a means of monitoring and stopping the printer, and when I'm confident it will not fail.

by n8bot - Reprappers

I'm pretty sure I'm going to die because of how good this print turned out. - 8 years ago

More pics: I designed and built a custom Delta last year, using berrybot parts (shopspt.com) and misumi stuff as well as some chinese junk. I'm currently working on an even better printer, a cartesian, but I've got this one tuned pretty well. 80 micron layers, e3d v6, PLA, duet 0.8.5, 400 micron nozzle, PEI print surface, 94 hour print time (looking to improve with the new printer/push this

by n8bot - Reprappers

Re: Yet another CoreXY printer - 8 years ago

Very cool. Are those misumi high-temp miniature linear guides I spot?

by n8bot - CoreXY Machines

Re: PVA filament stained print - 8 years ago

Just out of curiosity, which PVA are you using? will be venturing down that path soon and would like to hear some anecdotes. Got any pics of the prints?

by n8bot - General

Re: Diagonal rod length issue - 8 years ago

How are you measuring your arms? It needs to be measured from the pivot point to pivot point. Also, dimensional scale is not only dependent on arm length, but also horizontal radius and endstop adjustments. It's entirely possible to have roughly accurate scaling with not-real-world numbers, or to have a condition where the parts are not evenly scaled, but they still come out close enough that th

by n8bot - Reprappers

Re: New firmware 1.15 release candidate 3 - 8 years ago

dc42, whenever you release a firmware update you tend to write a small blurb about it on the forums (here or duet3d). Would you mind putting those blurbs into a running text file and putting it in the release folder on your github? It can be hard to find all the posts to follow the chain of changes that have happened if you are a few firmware versions behind. Thanks again for everything.

by n8bot - Duet

Re: Cast tooling plate print bed flatness - 8 years ago

I think PEI and printbite differ significantly in this regard, as has been touted by printbite's creator as a supposed feature (the parts pop right off when it cools down!)

by n8bot - Reprappers

Re: Cast tooling plate print bed flatness - 8 years ago

This is why I love PEI as a print surface. It doesn't lose its grip on the part while it cools down, so the parts don't warp.

by n8bot - Reprappers

Re: My coreXY design is progressing to the build stage - 8 years ago

Looking very nice.

by n8bot - CoreXY Machines

Re: Questions on DUET board usage - 8 years ago

Quoteselva_tvi ... @n8bot : Thats great. Any photos of such a lengthy print. I think this one was just around 100 hours, but it was under-sized so picture this but a bit bigger (and higher mesh resolution): more:

by n8bot - Duet