White lines (or brown lines) going through my mind.

Thanks to you all the new follows on Facebook! I much appreciate this and so will be posting far more regularly from here on. So watch this space!

To business…

After a good 6 month of reliably high quality prints a new issue arose. Prints where running fine until this started to happen towards the end of builds…

20150327_101950

Strange brown lines during white PLA prints, as well as thin strings around the prints, signifying oozing.  They are basically burns during extrusion. Strange? The temp on the readout is saying its printing at 190C as always.  I drop the temp to 185C and it has helped to a point but its still happening. Why is this?

The answer – a bad thermocouple. If you want to know what it is its this bit that attached  just above the nozzle on the block:

duplicator-3d-printer-thermocoupler-3

It became frayed and a little out of shape from taking the print head apart and putting back together so many times.  If this part does not work correctly the Wanhao does not return correct readings and miss-regulated the extrusion temperature. If you want to know how the change the thermocouple see this video:

https://www.youtube.com/watch?v=__iriKN7vvg

I hope you can appreciate the time and effort that goes into writing this blog, and of course the cost for my hosting, the materials, and parts for these experiments. So with this in mind, I would like to do a small plug for ‘Toptal’. They are a website who can supply you with a choice of the top 3% collection of professional freelancers for any kind of Software Engineering, Design, and Development you may need, big or small. Please follow this link to see check out the site. If you then wish to hire one of their great people please follow the link or click the banner at the top of the page. Not only do you get your perfect freelancer, but I am also happy to give 50% of my own commission back to you. This may be up to $1000! Everyone wins! – https://www.toptal.com/#hire-skillful-software-developers-now

Also, and particularly if you are reading this in the US, if you want to Wanhao 3D printer, follow this link and on your order enter the discount code “Charlie3” for $5 off any 3D Printer they sell. I also get a dizzying $5 for my efforts! – http://wanhaousa.com/

Thanks again!

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