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Which 3D printer?

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efrench:
I've printed quite a few timing belt pulleys for several rose engines.  The largest ones are 180 tooth GT2-3mm (about 170mm diameter).


--- Quote from: ddmckee54 on July 18, 2019, 02:45:39 PM ---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.


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

Country Bubba:

--- Quote from: 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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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

Muzzerboy:
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?

ddmckee54:

--- Quote from: efrench on July 19, 2019, 01:42:28 AM ---I'd be interested in seeing these jigs.  What software are you creating your models with?

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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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