Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 07, 2014 07:32PM |
Registered: 10 years ago Posts: 2,472 |
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rayhicks
Interesting Radian - I wonder if it's "special" or just carbon fibre tape they've measured the resistance of and sell as heating tape? (there's a lot of plain carbon tape on ebay, but it tends to be fatter - there's other stuff on the general web on composite/fibreglass sites that's cheaper and may be worth a punt - I'll get some and try it!). Looks like the resistance is around 8-20 ohms per metre (for tape ranging 15mm-25mm), so I'll have to try to remember Kirchoff's (?) laws and work out how to spread a network over an A4 area that'll work. Looks like people sew copper wire into the tape to connect it.
Ray
Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 07, 2014 07:47PM |
Registered: 10 years ago Posts: 578 |
Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 07, 2014 08:28PM |
Registered: 10 years ago Posts: 2,472 |
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rayhicks
Interesting Dave - I'm used to thinking in terms of ohms per linear metre for a fixed cross-sectional area (from using resistance wire) - I guess what you are saying is that the converse applies, and you can think in terms of ohms per square metre for a given length (or both for that matter)
Cheers
Ray
Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 07, 2014 09:04PM |
Registered: 10 years ago Posts: 578 |
Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 07, 2014 10:52PM |
Registered: 10 years ago Posts: 578 |
Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 08, 2014 06:23AM |
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Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 08, 2014 06:39AM |
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Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 08, 2014 06:44AM |
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Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 08, 2014 06:45AM |
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Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 08, 2014 06:50AM |
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Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 08, 2014 07:22AM |
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Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 08, 2014 08:03AM |
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Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 08, 2014 05:02PM |
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Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 08, 2014 05:29PM |
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Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 08, 2014 06:16PM |
Registered: 10 years ago Posts: 578 |
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badman.teddy.edward
Ray, you use plastic cement?
Do you have a thread on this? A quick search and I couldn't find one, but I am most intrigued...
Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 08, 2014 06:17PM |
Registered: 10 years ago Posts: 578 |
Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 10, 2014 08:02AM |
Registered: 10 years ago Posts: 2,472 |
Try simply holding the glass at an angle under a running hot tap. I find the running water gets under the film of solvent cement and most of it lifts and washes away by itself - and the bits that are left come off with a brief rub with a scrubbing brush or scouring pad. Don't let too many bits go down the plughole, because I have a feeling they'd block the drain fairly easily.Quote
rayhicks
(...)
It has the advantage that it "self cleans" the bed - but every now and then you need to remove the build up - a stanley blade paint scraper works well for that.
Ray
Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 10, 2014 09:34AM |
Registered: 10 years ago Posts: 14,672 |
Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 10, 2014 10:24AM |
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dc42
I used plastic cement for a while and I can confirm that it works well; but now I'm back to printing direct on glass. The secret to printing direct on glass seems to be:
1. Use the right piece of glass, some pieces seem to work better than others (and one side of the glass may work better than the other side). The original glass supplied with the kit works well for me. The glass needs to be free from scratches.
2. Clean the glass with hot soapy water, NOT acetone or isopropanol. This is only necessary every several prints, if you avoid fingermarking the glass.
3. Just before printing, wipe the glass with a clean tissue dampened with vinegar.
4. Use a sufficiently high bed temperature. I normally use 70C for printing direct on glass, but once I left it at 60C by mistake and the print still stuck OK. The print comes off easily once the glass has cooled to room temperature.
Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 10, 2014 03:37PM |
Registered: 10 years ago Posts: 14,672 |
Re: Slide bearings on Aluminium Extrusion (no smooth bars) March 10, 2014 06:10PM |
Registered: 10 years ago Posts: 578 |
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dc42
I should have made it clear that my direct-on-glass instructions were for PLA. I've not heard of ABS being printed successfully direct on glass.