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Tools / Re: Which 3D printer?
« Last post by ddmckee54 on July 19, 2019, 11:49:12 AM »
I'd be interested in seeing these jigs.  What software are you creating your models with?
efrench:

I've got a thread over on MEM, under Additive Machining, called "A fix for the shakes".  That one's been on the back-burner for a few months.  It started as a soldering jig, morphed into a terminal crimper, and it's next iteration is looking like it'll be a combination of both.  It's probably about time I dust that thread off and take it to the next level.

The software I use for the models is DesignSpark3D, version 4.1.  That's a dumbed down version of Space Claim, but the price was right - free.  Unfortunately that software is rather limited in what file formats it can output, its' got a proprietary RSDOC format, it does a dandy job on STL's, it does 3D PDF's, and I think it can output a wireframe 3D DXF.  I've been threatening to devote the time to learn Fusion 360 but haven't been able to find enough time to get up to speed with that software yet, so DesignSpark is still my go to software. 

I use Simplify3D for my slicer.  I used to use the Prusa version of Slic3r, I found through simulation that Slic3r did a better job putting supports where they were needed than Cura did.  The Prusa version of Slic3r worked better on my original Prusa clone printer than the standard version of Slic3r.  Once I bit the bullet and bought Simplify3D I found that it does a much better job of not leaving gaps in narrow perimeters like Cura and Slicer did.  If your perimeter wall thickness is more than one filament wide, and less than less than an even number of filament widths Slic3r and Cura will leave a gap in the perimeter wall.  Simplify will go back and either lay an extra thick single filament in the gap or do a solid fill whichever you tell it to do.  You haven't seen a 3D printer go spastic until you watch one do a solid fill at 60mm/sec, when the fill is 90° to a 0.5mm gap.  I think it defaults to the single filament setting, but I just had to see what it would do.

Don
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CNC / Re: Cetus3D 3D Printer
« Last post by awemawson on July 19, 2019, 10:56:08 AM »
Then it was a case of churning them out, night and day. I even set a camera on them so I could monitor them printing remotely !

Because of the increased width I 'only' needed twelve, but in the event I actually printed fourteen as two didn't clean up as well as I wanted.

4 hours and 41 minutes each  :bugeye:

End result however is that two previously useless (to me) racks are now very handy, and for a very modest cost compared to buying the real things.
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CNC / Re: Cetus3D 3D Printer
« Last post by awemawson on July 19, 2019, 10:51:20 AM »
Well I've just finished a mammoth print run on the Cetus 3D printer, which it coped with like a champ :thumbup:

For some time I've had a pair of 'desk-top' metal tool racks designed to take a variety of 'inserts' to hold differing shanks of tooling. As I got them each was equipped to take seven 4 Morse Taper tools. Although I do have 4MT drills, they already have a rack so I wanted to 're-purpose' these to take the VDI40 tooling for the Beaver TC20 CNC lathe.

So, steaming up Fusion 360 I took the basic shape of the 4MT holders, increased the size of the 'tool bore' to take VDI40, and the size of the upper platform to accommodate some of the larger tools, yet retained the mounting peg locations for actually fitting into the rack.
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Tools / Re: Which 3D printer?
« Last post by Muzzerboy on July 19, 2019, 09:26:38 AM »
When I try to post a reply here, it tells me I have already posted when it's pretty clear I haven't. The preview button doesn't do anything. Is this a known issue with a fix?

It seems to be when I try to attach a photo. Firstly it says Madmodder can't process the request, then it claims the post has already been made when I repeat the request. The photo is about 800k, so not too big surely?
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Tools / Re: Which 3D printer?
« Last post by Country Bubba on July 19, 2019, 07:50:10 AM »
Eric - what temperature do you run your glass bed at for PLA? I tried the default 60 degrees, and the part peeled off before it got more than 1mm high. Went up to 70 degrees and it pulled away at less than half that... should I be running it cooler? Maybe 50 degrees? I'd experiment more, but I've got another 5:30am start, and already it's nearly 11pm... gonna be cranky in the morning...
I'm not Eric, but I run my glass bed at 80°C (from testing, I also know there is a 5° thermal lag due to the glass) and I find my prints are firmly attached until the temp cools down to about 30° or less.  Also, I clean the glass on occasion with hot soapy water in the sink using dish washing soap being sure not to touch the surface. All of this was based on a video that I watched on youtube. <
>

HTH

Country
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Tools / Re: Which 3D printer?
« Last post by efrench on July 19, 2019, 01:42:28 AM »
I've printed quite a few timing belt pulleys for several rose engines.  The largest ones are 180 tooth GT2-3mm (about 170mm diameter).

My hands have a tremor, makes it hard to crimp itty-bitty wires and terminals together and impossible to solder electronics.  For a year or so I have been working on 3D printing jigs that will help me to do this.  They are just about usable, and I've got a bunch of printed parts sitting on my desk waiting for me to take that project off the back-burner and get back to work on it again.


I'd be interested in seeing these jigs.  What software are you creating your models with?

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Tools / Re: Which 3D printer?
« Last post by Brass_Machine on July 18, 2019, 11:08:59 PM »
Eric - what temperature do you run your glass bed at for PLA? I tried the default 60 degrees, and the part peeled off before it got more than 1mm high. Went up to 70 degrees and it pulled away at less than half that... should I be running it cooler? Maybe 50 degrees? I'd experiment more, but I've got another 5:30am start, and already it's nearly 11pm... gonna be cranky in the morning...

Hiya Ade,

I run the bed @60. But, I have changed a few other settings.... What are you using for a slicer? I use Cura.

Print speed @ 45 mm/s and infill @75 mm/s
Initial layer Speed 22.5 mm/s
Print temp is 200c
Initial Print temp is 185c
Initial layer flow 103%
Initial fan speed 0%

BUT first clean the plate with rubbing alcohol. Use the good stuff! I had adhesion issues until i did that.

Also... change your retraction distance to 10mm, Helps with stringing.

Eric



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Tools / Re: Burr and matting media for vibratory tumbler to nicefy steel
« Last post by PekkaNF on July 18, 2019, 06:33:11 PM »
Yes that could be one choice. I have that in my backyard a litle heap left from paving work. We use a lot of under the concrete tiles outside to level harder cruched rock bed. However I would hate to have any of that left into threads or such.

I ordered a 2x5kg set of differetn abrassive pyramids and for polishing ceramic cylinders + little polishing liquid that has antirust properties. All from Germany from a small comppany that is specialized on this sort of products, they don't normally deal with private customers, shiping was 40 EUR, but they definantely seem to know their stuf.

Pekka
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Tools / Re: Which 3D printer?
« Last post by AdeV on July 18, 2019, 05:45:11 PM »
Eric - what temperature do you run your glass bed at for PLA? I tried the default 60 degrees, and the part peeled off before it got more than 1mm high. Went up to 70 degrees and it pulled away at less than half that... should I be running it cooler? Maybe 50 degrees? I'd experiment more, but I've got another 5:30am start, and already it's nearly 11pm... gonna be cranky in the morning...
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The Water Cooler / Masham Steam Fair this weekend
« Last post by howsitwork? on July 18, 2019, 05:22:44 PM »
Anyone going, apart from me? Sunday for me as working saturday. They’ve set it up already and campers and caravan nerds are now in situ. Hopefully good weather and loads of hot donuts.

Always loads of traction engines, tractors and steam powered demos on both days. Saturday night there’s a “foraging party “into Masham town  square  in search of fish and chips ( plus beer as the brewery is on route) . The traffic que from the traction engines is legendary.

Tool stalls etc as well , for the needy. :nrocks:

Ian
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