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Hi Nealeb,
I did as nophead suggests and measured inside the tip using a thermocouple on my multimeter. In my case it was after I had previous put plastic through it, so was a pain, but as my probes diameter is similar to the filament diameter I used it to manually extrude the remaining plastic (I did this slowly and carefully, constantly pulling the thermocouple back out and cleaning it off w
by
CraigRK
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General
The one on the left and the 2 on the right make up the belt cutter.
The piece n the left allows you to adjust to the width of the belt. The width it cuts to is fixed though. Assemble, feed the belt in, pierce Stanley blade through the thin slot so it cuts the belt, then pull the belt through against the blade. Careful though as the belts have a metal insert which will not be cut by the blade.
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CraigRK
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General
nophead Wrote:
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> How big is this? Surely at the scale of a spool
> any hole shrinkage would not be visible. Also the
> rectangular slots look bigger and they should not
> need any correction.
Nophead,
Thanks for replying. These changes don't really affect the object I am making, but as I mentioned when replying to Sublime, th
by
CraigRK
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Slic3r
Sublime Wrote:
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> A lot of people are having issues with this and
> there is a bug report filed on Github to have an
> option to disable it.
>
> For most people the problems are when slicing
> stuff people have modelled with shrinkage in mind
> when designing and Slic3r is now compensating
> again. Are your holes bein
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CraigRK
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Slic3r
Slice3r 0.8.2 appears to include changes in the algorithm to correct shrinkage of inner holes, but I am finding that this now means that previously perfectly calibrated parts aren't printing correct.
So the main question is this. Do I have to recalibrate my printer to match what Slic3r now does (if this is possible)? Or do I modify all the parts?
Outer dimensions seem to be unaffected so I ca
by
CraigRK
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Slic3r
Hi,
Good luck with this. I see you have already gotten quite a few backers.
Quick question tough. You only currently supply 1.75mm extruders. Are you able to support 3mm filament at all? I know it needs more torque, so perhaps this extruder design won't support it.
TIA
Craig
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CraigRK
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General
Thanks Nophead,
The notes you added to the wiki will help. I will attempt this sometime soon. In the meantime will stick to my disconnection of the stepper to prevent damage.
by
CraigRK
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Sanguino(lolu)
nophead Wrote:
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> OK is was crosstalk from the EDIR pin, which it
> thinks is an LED and ESTEP. Putting a scope on
> ESTEP was enough to stop it completely as it acts
> as a weak pull down.
>
> Putting a 4K7 pullup on the enable line stops all
> the motors being energised during firmware
> download and during reset. O
by
CraigRK
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Sanguino(lolu)
Understood, but i thought we were talking about 608 bearings, not linear bearings, sorry about the confusion.
I just found it interesting how people seem to be getting different tolerances in different parts of the world.
by
CraigRK
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General
I wonder if this is a sign of buying metric rod in a non metric location. I.e they supply Tues 8mm. Whereas in "metric" locations thy provide a nominal 8mm.
I simply ordered 8mm stainless rod from an online metal merchant here in the uk and there is no problem with 608 bearings.
Craig
by
CraigRK
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General
Hi,
This might not help,must I have observed that when the cabling I used for my heated bed wasn't ideal (I had a block connector in line) that I would only reach 90 degrees no matter what. Rewriring with the right stuff solved the problem.
by
CraigRK
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General
I was thinking about this overnight (before seeing these last to posts) and was thinking that maybe the reason was that your nozzle wasn't actually the diameter you thought it was. In my opinion, they are very difficult to drill accurately and I would suspect that a slight knock would see a dramatic change in size.
The last assumption made based on me reading that some people make their nozzles
by
CraigRK
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General
Wow,
I'd forgotten that I had posted his topic almost 2 years ago. What a resurrection! Having said that, I solved that problem last time by buying some ABS on eBay from A guy who switched to PLA and the proceded to not touch my Mendel for over a year,
It's printing now and I just bought some filament so it will be a while before I need more, but out of interest Roman. What is the weight of
by
CraigRK
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Wanted
Adrian,
Have you actually contacted Parcan about this. He is keen to know about any issues with his designs as it helps him improve. I think his customer service is great.
I have 2 of his hotends (only using one). I did have a similar figure to yours, but this was after I had been abusing the hot end. I have noticed that when I reflash my firmware, my extruder reverses a bit. With cold fil
by
CraigRK
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General
This is brilliant.
I'd love to get hold of an STL of that chair to print on a Mendel (as a gimmick).
I also have an Armdroid robot arm (I refer to it in this blog post, but no pictures).
I used a lab arm like this during my final year project at Uni, so when I was offered one I snapped it up. ( it had been used in a lab and when the lab shut this lady took it home and it sat in her loft for ye
by
CraigRK
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Polar Machines, SCARA, Robot Arms
Thanks Andrew.
Nophead and Triffid_Hunter have also replied on my blog.
All advice is much appreciated!!!
I guess the same applies to the hot end!!
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CraigRK
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United Kingdom RepRap User Group
Hi nophead,
Having just had a problem with my connector frying I need to sort out an alternative. Have you modded your Sanguinololu yet? If so, will you be blogging about it (or sharing the details). As I said on my Blog, I'm no electronics guru so don't even know where to start.
Thanks,
Craig.
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CraigRK
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United Kingdom RepRap User Group
For closure I thought I would point out that I am pretty sure the discrepancies are due to either having the incorrect thermistor table loaded, or that the variance in the thermistors I have tried are at the extreme of the design tolerance.
Either way, I have remedied the problem by creating my own thermistor tables as documented in my blog.
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CraigRK
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Reprappers
Hi all,
On the weekend I successfully got my Mendel printing (see my blog if you're interested).
I did however note that I was struggling to get the bed to reach 110C.
I bought a multimeter which does temperature readings and noted that the bed was much higher than Pronterface (or the Sprinter firmware) was declaring. I am using an EPCOS 100k thermistor supplied by Think3DPrint3D and chose th
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CraigRK
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Reprappers
Hi Eddie and Huw,
Yes I still have some.
Please email me direct, my email address is included above.
Craig
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CraigRK
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For Sale
I'd agree and should say that this was exactly why I added the last comments that I did.
Terry had experienced some problems and his approach was to post against every topic that he could find that was associated with TechZone. It worked for him as he then got a satisfactory response. I was just trying to 'tease' the details out of him so that he could convert his initial negative observations
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CraigRK
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For Sale
I'd assume you mean change one of these at a time. (That's the way we fix things at work, one change at a time, else the two might cancel each other out).
Wade Wrote:
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> Reduce your first layer height, turn off the fan,
> switch to PLA, or try a heated bed.
by
CraigRK
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General
Thanks Sebastien,
I've had contact form a UK member near me who advised on a locally available replacement Opto (Electronics aren't my forte).
I've ordered bits which should arrive tomorrow, so more feedback on Sunday or Monday.
Regards,
Craig
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CraigRK
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Controllers
SebastienBailard Wrote:
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> Could you name and shame?
>
> Agreed. I think the rest of the community will
> want to know if one supplier is shipping an extra
> 22.5% in their orders.
I know you're having a laugh, but initially when I read the post, I couldn't see the problem. Then I re-read it more carefully and realised tha
by
CraigRK
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General
Thanks,
I shall have a play. Although tomorrow is now a Camper day, so I don't think I will make progress on this until next week.
Regards,
Craig
by
CraigRK
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Controllers
Thanks for replying Nophead,
TechZone didn't supply a schematic. It's a very simple circuit so I will try to reverse engineer the schematic from the files they supplied on the Wiki and post it here and on my blog.
Having said that, I'm sure (but not positive) they may have been working before when I was trying the ScrapStrap.
I'll try the older version of the firmware in case some change in
by
CraigRK
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Controllers
Hi all,
As per the ramblings on my blog, etc, I have assembled most of my Mendel frame and am trying to finalise the electronics connections.
All 3 the axes are running fine, but the Opto's aren't. I managed to damage one as it would fit where I wanted it, so I have taken off the connectors and soldered on wires. Of the 3, the LED lights up on 2, so I reckon the other is dead. (Remember I hav
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CraigRK
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Controllers
More still available and added postage costs for Canada & Australia:
USA/Canada/Australia - GBP6.00 for 1, GBP10.00 for 2, GBP23.00 for 5
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CraigRK
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For Sale
Buback Wrote:
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> currently, the documentation is no worse than any
> lego kit i got as a kid. those instructions only
> had pictures, if any of you remember. the
> mechanical construction is pretty straightforward
> so far. i expect the software and electronics are
> a bit harder.
I have to agree with this. I am close to f
by
CraigRK
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General
Connected up the remaining axis steppers on my Mendel today and reprogrammed the firmware back to standard Mendel spec (from my hacked ScrapStrap) spec.
The axes are moving great, but when it came to mounting to optos I managed to damage one as they don't fit properly being the TechZone ones. I'll continue on another day and see if i can fix the Opto and make some mountings and alternative thin
by
CraigRK
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Reprappers
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- 11 years ago