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Re: Skeinforge Powwow - 15 years ago

I'm not saying Z is the cause just that the hole dimension changes on layer 11 but I have no idea on the cause the lower layers (less than 11) have an extra shell around the inside of the feature.

by Ian Adkins - Skeinforge

Re: Skeinforge Powwow - 15 years ago

I have also seen this where internal dimensions expand as the Z increases. This is a new thing an older version of Skeinforge does not do this using exactly the same file and preference settings. On the attached STL file the problem is seen on layer 4 to 10 with 11 and up being OK. I have attached the working version, and the problem version, the profile folder & the STL file.

by Ian Adkins - Skeinforge

Re: Skeinforge Powwow - 15 years ago

Use Meshlab first to centre the object around the origin then run through skienforge this will correct the problem

by Ian Adkins - Skeinforge

Re: Skeinforge Powwow - 15 years ago

Ok I found the problem it is in the "Inset" function if the Extrusion Perimeter Width over Thickness (ratio): is too high default 1.8 then the results were bad I lowered this figure to 1.1 and all is OK. The older version has a figure of 1.8 which I guess was not being used as it generated good output. I think this would only show up in a single filament thickness build

by Ian Adkins - Skeinforge

Re: Skeinforge Powwow - 15 years ago

I have an older version of skeinforge (attached) and the latest version I very much like the new features but the new version fails to correctly slice the attached STL file I'm not sure if it's settings as the object is only 1 filament wall thickness but I've tried to match everything with no success. It works great on most other stuff.

by Ian Adkins - Skeinforge

Re: ABS in Pakistan - 15 years ago

We can supply to Pakistan no problem shipping is as much as the filament though

by Ian Adkins - Wanted

Re: Support material - 15 years ago

Enriques skeinforge does support material very well I'm still tunning the settings and it is slow as having only one head it changes temp 2 times per layer, but it works and I've printed stuff I could not have without it.

by Ian Adkins - General

Re: what makes a good extruder? - 15 years ago

We can run at 64mm/sec (possibly higher) with a stepper driven screw drive extruder, probably the heaviest combination and it is not a problem, it does not print so well due to thermal stuff etc but not mechanical problems, head wobble, or inertia.

by Ian Adkins - Mechanics

Re: Skeinforge Powwow - 15 years ago

I think I may have found a bug in "Fill" if I set the Extra Shells on Base (layers): to anything except 0 it comes up with a division by zero: float error. But (there's always a but!) it only does this on complex shape files and on STL files that I have to run with Unproven mesh selected in "Carve" All the STL's I've drawn even complex ones don't appear to have this problem, I don't know what C

by Ian Adkins - Skeinforge

Re: Skeinforge Powwow - 15 years ago

I ran a -2.0 now 2.0 "Support Inset over Perimeter Width" last night and it worked very well with a very clear gap this made removing the support easy I will try a 1.0 and see how it goes. The different feed rate will be really cool I'll try that also

by Ian Adkins - Skeinforge

Re: Skeinforge Powwow - 15 years ago

I,ve done some more testing with support another feature that would help with removal would be if the support didn't touch the sides of the object as it's building. At present if you do a tall section the support will build next to it but just touching, while the support is at a lowertemp the actual model is at a higher temp and sticks to the support quite well making it difficult to remove. I'v

by Ian Adkins - Skeinforge

Re: Bits from bytes v 3.0 - 15 years ago

Coming very very soon finished extruder manual, yes the bolt needs to be removed I'll amend the manual for this as well, this is due to replacing the MDF print platten with Acrylic as ABS prints better on Acrylic, but this is thinner (and then the problem with the bolt) i didn't catch this until recently as I tested with the acrylic on the MDF as it was a quicker fit . I also lowered the switch w

by Ian Adkins - Plastic Extruder Working Group

Re: Wax Print Heads? casting parts? - 15 years ago

If it's for casting parts ABS works for investment casting (lost wax) as it also melts out of the cavity, so RepRap is there already :-)

by Ian Adkins - General

Re: Skeinforge Powwow - 15 years ago

I've just done a really good print using support material I'll post pics as soon as I can it is a dome on top of three slender posts. It worked fine but removing the support material was difficult and I broke the model getting it out. Would it be possible to have the material build up in a crossing pattern more like the infill. Then i think it would be possible to remove it a strand at a time if

by Ian Adkins - Skeinforge

Re: Sketch-up 7 to STL files - 15 years ago

My understanding is you need a plugin a google search turns up loads some free some not!

by Ian Adkins - Reprappers

Re: Parts in the UK - 15 years ago

I use for small prototype runs always been very happy with the service etc

by Ian Adkins - United Kingdom RepRap User Group

Re: Making the bits from bytes extruder working - 15 years ago

Version 3.0 is completely new, same principle but all parts purpose engineered for a much easier build. The V2.0.1 has printed for days on end at various shows etc but does require quite careful setting up

by Ian Adkins - Plastic Extruder Working Group

Re: stepper motors - 15 years ago

take a look here: This is the correct wiring the other problem could be sending the pulses to quickly for the motor, but i don't know the Arduino code so some elese would need to comment on this.

by Ian Adkins - General

Re: Purpose of washer in LaserCut extruder - 15 years ago

Yep that's correct to stops the bolt pushing back into the Acrylic

by Ian Adkins - Mechanics

Re: Z Belt tensioner - how to adjust? - 15 years ago

Adjust the main long bolts by moving the nuts that are against the clamp on the diagonal rods i.e. push the bearing away from the diagonal rod and into the belt to make it tighter.

by Ian Adkins - Mechanics

Re: Unimatic - 15 years ago

As you all know we are supplying Unimatic these kits and are well aware of the situation regarding there going into liquidation. This is not due there reckless actions but is in-fact due to the domino effect of companies taking others out around them. Unimatic had been trading for over 42 Years! And indeed Martin will be carrying on with the RapMan product. I would like to assure all people who h

by Ian Adkins - General

Re: Cheap, small, pre-assembled, powerful RRRF compatible DC motor driver? - 15 years ago

Or just replace the blown chip!

by Ian Adkins - Controllers

Re: problem with x idler bracket - 15 years ago

I agree it is expensive compared to US prices, but we are trying to develop a UK/European supply for all polymers ABS, PLA, PCL + other interesting stuff and of course all the usual ones. While the volume is low the price is high but they are the only people who I could find that are prepared to work with us on this across a range of polymers at low volume, as volume increases we should see real

by Ian Adkins - Reprappers

Re: Where do I find the BitsFromBytes Drawings? - 15 years ago

The version 2 DXF's are in SVN I'm not sure where as Adrian put them up for me but they are there the parts will need spliting out as they are all nested for laser cutting but that is a fairly trivial task

by Ian Adkins - Plastic Extruder Working Group

Re: Bits from Bytes Assembly Instructions - 15 years ago

You proabably now realise but if not the site is back up sorry for it being down for so long (not enough hours in the day!)

by Ian Adkins - General

Re: problem with x idler bracket - 15 years ago

We are now back on-line :-) and will have all the filaments back up either today or tomorrow including ABS. Sorry for it going off line for so long we have been updating the main website engine and porting all the data was a problem but all sorted now.

by Ian Adkins - Reprappers

Re: Ponoko RepRap Extruder Troubleshooting slipping filament - 15 years ago

I've not direct experience of the Ponoko design but you probably need to sharpen the thread with a file also try running a hacksaw into the root of the thread this gives it more of a butres shape which also helps

by Ian Adkins - Reprappers

Re: For all you lazy buggers... - 15 years ago

Will we also supply them direct via www.bitsfrombytes.com as always. It's the Version 3 that some of you are already waiting for.

by Ian Adkins - General

Re: Aluminum for frame members? - 15 years ago

I woundn't go with Al as the current 8

by Ian Adkins - Mechanics

Re: Gear-driven Z-stage instead of Belt-driven - 15 years ago

Backlash in the gears would be a problem, it can be solved with anti-backlash gears but it all gets more complicated, although backlash in the Z axis is less of a problem as while printing it always goes the same way.

by Ian Adkins - Mechanics