[ELECTRON] Proposed new club + Arduino meet up

Blair Thompson mail at justblair.co.uk
Sat Nov 12 19:17:51 UTC 2011 

I have a handsaw that has a metal cutting blade on it.  Makes pretty quick
work of steel

Blair

-----Original Message-----
From: members-bounces at electronclub.org
[mailto:members-bounces at electronclub.org] On Behalf Of Kieran Wyse
Sent: 12 November 2011 19:12
To: Discussion list for the Electron Club
Subject: Re: [ELECTRON] Proposed new club + Arduino meet up

If no one has them lying around  I picked up form b & Q, they seem to be the
cheapest.


http://www.diy.com/diy/jsp/bq/nav.jsp?action=detail&fh_secondid=9283910&fh_l
ocation=//catalog01/en_GB/categories%3C{9372015}/categories%3C{9372044}/cate
gories%3C{9372215}/specificationsProductType=threaded_rods(I
take it these are M8)


If anyone has something to cut them with that would be great. I am not sure
the cca would approve of me using an angle grinder. Otherwise they will have
to wait to be cut at the next meeting.

Kieran



On 11 November 2011 21:12, Blair Thompson <mail at justblair.co.uk> wrote:

> I will look forward to seeing what you get done.
>
> I have now completed a few of the smaller plastic parts.  I was 
> planning to tackle the vertexes next  (that is if no one has started 
> them yet?).  One because they are less complex parts (and I am still 
> honing my printing
> skills) and two because it would mean that we were only the 8mm rods 
> away from getting something started build wise.
>
> http://goshg.org.uk/index.php/reprap  you can see on the link that we 
> have gathered quite a few of the components and others are on order.
>
> I know in the meeting a few people mentioned they may have threaded rod.
> Can everyone have a look and see if the can update the BOM with what 
> they have?
>
> Blair
>
> -----Original Message-----
> From: members-bounces at electronclub.org 
> [mailto:members-bounces at electronclub.org] On Behalf Of Thomas Parry
> Sent: 10 November 2011 16:27
> To: Discussion list for the Electron Club
> Subject: Re: [ELECTRON] Proposed new club + Arduino meet up
>
> Ramps does have a natural advantage that one of us is familiar with it 
> and it seems like a well respected choice so I'll just go ahead with them.
>
> The more surface mount components the better from my perspective as it 
> make the board production easier, less holes to drill, and the 
> components are usually cheaper.
>
> I will keep you guys updated with my progress and will hopefully have 
> something to bring to the meeting next week.
>
> Tom
>
> On Wed, Nov 9, 2011 at 10:36 PM, Blair Thompson <mail at justblair.co.uk
> >wrote:
>
> > Hi Tom
> >
> > I can't say that I am totally a ramps fanboy.  I favour it for a 
> > couple of reasons though...
> >
> > 1.  I know it (yep that is the main reason) 2.  SD support 3.  Good 
> > support from the firmware point of view.  (ie Marlin, Sprinter,
> > etc.)
> >
> > There are others though and some may be easier to manufacture.
> >  Sanguinololu
> > I believe can be made to operate from SD.  I would have to check to 
> > see what firmwares it can support.
> >
> > As for ramps 1.4  If you enjoy working on surface mount stuff this 
> > is one route to go.  Ramps 1.3 is through hole and has as far as I 
> > can tell all the relevant features...
> >
> >
> > -----Original Message-----
> > From: members-bounces at electronclub.org 
> > [mailto:members-bounces at electronclub.org] On Behalf Of Thomas Parry
> > Sent: 09 November 2011 20:26
> > To: Discussion list for the Electron Club
> > Subject: Re: [ELECTRON] Proposed new club + Arduino meet up
> >
> > Looking at the options for the electronics, I'm not really sure what 
> > path to go down.  Blair, I know you're a fan of the RAMPS boards, 
> > what about if I make a RAMPS 1.4 board? What are peoples opinions on 
> > the best board for me to go ahead and make?
> >
> > Tom
> >
> > On Tue, Nov 8, 2011 at 10:48 PM, Blair Thompson 
> > <mail at justblair.co.uk
> > >wrote:
> >
> > > As I said in my ps.  I have just received a bundle of nuts and 
> > > bolts, which should cover the needs in that department.  I have 
> > > marked them as on order on the RepRap page at goshg.  I should 
> > > change that to yes when I get a chance.
> > >
> > > I have also been working on some ABS prints for the printer as well.
> > > I am still refining the hole sizes for the bar clamps.  What I 
> > > have made so far is probably useable, but I would be happier if I 
> > > can get the tolerances down a little before attempting more critical
prints.
> > >
> > > I have been using parts from Greg Frost's repository for this as 
> > > he has a more robust looking Y bracket.  I will probably use one 
> > > of the close but no cigar prints to upgrade my own printer.
> > >
> > > As for changing nozzles on the fly?  The hot end is bolted into 
> > > the extruder (if using a Wades which is the current fashion) with 
> > > two 3mm bolts.
> > > Changing the nozzles over is probably going to damage the hot end 
> > > if done frequently, but changing hot ends is certainly possible if 
> > > fiddly.  If it were me I would be tempted to carry two 
> > > extruder/x-carriage/extruder motor/hot-end combos for an easy swap 
> > > over.  Use a durable connector to make the electronics easy to 
> > > swap and Bob is indeed your mammies sister's ball and chain.
> > >
> > > For what we are hoping to do, sticking with the standard sizes 
> > > would make calibration that bit easier especially if we use the 
> > > Pronterface/Sfact/marlin firmware options.  You can get pretty 
> > > good
> > prints
> > > after a pretty simple calibration routine.   It's only when you are
> > trying
> > > to make mechanical parts that you need more precision.
> > >
> > > Blair
> > >
> > > -----Original Message-----
> > > From: members-bounces at electronclub.org 
> > > [mailto:members-bounces at electronclub.org] On Behalf Of Kieran Wyse
> > > Sent: 08 November 2011 22:29
> > > To: Discussion list for the Electron Club
> > > Subject: Re: [ELECTRON] Proposed new club + Arduino meet up
> > >
> > > Once the reprap is built we can certainly thing about enclosing 
> > > it, it may well improve build quality. As to the fidelity it does 
> > > seem just from visual inspection of the parts printed that the 
> > > limiting factor seems to be the size of the nozzle. Which begs the 
> > > question is there are any way to change the nozzle size on the 
> > > fly? If it were possible and I do not know how I think it would 
> > > likely turn the reprap into a VERY capable machine.
> > >
> > > I have been told that the motors are going to take another 11 days 
> > > to arrive. They should be here by the end of the month i reckon. 
> > > Has anyone else had more progress than myself?
> > >
> > > Kieran.
> > >
> > > On 8 November 2011 21:56, Blair Thompson <mail at justblair.co.uk> wrote:
> > >
> > > > I have seen other reprap experimenters talking about using
> enclosures.
> > > > I for the life of me cant remember whom.  What I do seem to 
> > > > recall was that they were using the heated bed as the main 
> > > > heating source for the enclosure and then using a temperature 
> > > > controlled fan to maintain the ambient temperature inside the 
> > > > case.  I seem to remember a temperature of around 40c as being 
> > > > in the ballpark as to
> > what
> > was useful.
> > > >
> > > > If I remember quickly, what the experimenters were trying to 
> > > > achieve was reduction of distortion in taller models.  Warping 
> > > > occurs sometimes when parts of the model at the base cool while 
> > > > those at the top i.e. the most recently printed are stil hot.  
> > > > An enclosure serves to reduce the difference in temperature from 
> > > > the most recently printed parts of the model to the least 
> > > > recently
> printed.
> > > >
> > > > I have been trying to perfect my machine and have found that fan 
> > > > cooling of the filament as it is laid down makes a difference to 
> > > > the quality of the prints in either ABS and PLA.  For ABS 
> > > > however I also have to lay a skirt which reduces the cooling at 
> > > > the bottom of the model from either my cooling fan or from the 
> > > > movement of the Y
> axis.
> > > > I was getting lifts from the build plate before I started using 
> > > > the skirt.  I don't know if this will improve PLA prints as I 
> > > > have not tried it yet, Imanaged to get good prints without it.
> > > >
> > > > The layer thickness you reference for the Reprap of 0.3mm 
> > > > depends on the extrusion nozzle aperture width.  With a 0.5mm 
> > > > width and 3mm filament the layer thickness works out at about 
> > > > 0.4mm using the sfact software as a slicer.  You can get lower 
> > > > by using different filament thickness and different nozzle aperture
widths.
> > > > What you gain in fidelity you lose in build speeds though.
> > > >
> > > > One idea I had was to not build the reprap using triangular 
> > > > vertexes, but rather to build an MDF cube but use the Prusa 
> > > > dimensions and mechanical parts.  This would certainly allow 
> > > > experimentation in terms of retaining some ambient heat around 
> > > > the
> > models being created.
> > > >
> > > > Regards
> > > >
> > > > Blair.
> > > >
> > > > Ps  I just got a delivery of various screws and bolts that I needed.
> > > > I of course ordered a few extras.  All but the M8 washers 
> > > > arrived
> > today.
> > > >
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: members-bounces at electronclub.org 
> > > > [mailto:members-bounces at electronclub.org] On Behalf Of Brian 
> > > > Loudon
> > > > Sent: 08 November 2011 21:29
> > > > To: Discussion list for the Electron Club
> > > > Subject: Re: [ELECTRON] Proposed new club + Arduino meet up
> > > >
> > > > Hi to those interested in RepRaps, I came across this patent 
> > > > relating to temperature and flow control for professional Fused 
> > > > Deposition Modelling systems ;
> > > >
> > > >
> > > > http://www.google.co.uk/patents?hl=en&lr=&vid=USPAT5866058&id=Og
> > > > UX
> > > > AA
> > > > AA
> > > > EBAJ&o
> > > >
> > > > i=fnd&dq=stratasys+patent+fused+deposition+modelling&printsec=ab
> > > > st
> > > > ra
> > > > ct
> > > > #v=one
> > > > page&q&f=false<http://www.google.co.uk/patents?hl=en&lr=&vid=USP
> > > > AT
> > > > 58
> > > > 66
> > > > 058&id=OgUXAAAAEBAJ&o%0Ai=fnd&dq=stratasys+patent+fused+depositi
> > > > on
> > > > +m od elling&printsec=abstract#v=one%0Apage&q&f=false>
> > > >
> > > > The stratasys Dimension printers achieve .178 mm, .254 mm or .33 
> > > > mm layer thicknesses,
> > > >
> > > > http://www.dimensionprinting.com/3d-printers/3d-printing-compari
> > > > so
> > > > n_
> > > > ch
> > > > art.as
> > > > px
> > > >
> > > > the reprap is quoted as a layer thickness of 0.3 
> > > > http://reprap.org/wiki/Mendel
> > > >
> > > > The patent above emphasises the importance of temperature and 
> > > > the professional machines all have enclosures, makes me wonder 
> > > > if the reprap performance can be optimized?
> > > >
> > > > cheers
> > > >
> > > > Brian
> > > >
> > > >
> > > >
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