Quantcast
Channel: Reprap Forum - Controllers
Viewing all articles
Browse latest Browse all 10211

Re: Unusual stepper ratings - vref settings for new Melzi

$
0
0
Ok thanks. I've had the extruder apart many times but not examined down inside the hot end I must admit.

I've tried what you suggested and the filament is hard to push through. Strangely it seemed good at first, but then got more difficult. I had it up as hot as 230C (and this is PLA not ABS) and it was still needing a lot of pressure by hand to feed through.

I have a suspicion that it's poor quality PLA that could potentially be the issue here since it was very cheap stuff. When I bought it, I didn't realise there was a big variation in quality but have read a lot on this since.


I might ask my mate if he has some I can use so that I can try it with known good quality plastic.

Another thing is that I've swapped from ABS to PLA and I've no idea if there's a particular method you should do in order to do this. Could it be possible for instance that due to the lower print temperature with PLA that there's a bit of ABS still in there that is restricting the flow of the PLA? Basically to change them over I pushed the ABS through as best as I could, then pushed the blank end of a 3mm drill bit in to push it all through, then I inserted the PLA.

On another note, I wonder if there is any design for an extruder that uses double the gripping area of a normal Wades extruder? I have an idea about having one where an opposite main gear meshes with the existing one and of course turns the opposite way, driving a second hobbed bolt against a second bearing, but higher up. I wonder how easy this would be to make, and if it would help reduce slippage and stoppages etc....

Viewing all articles
Browse latest Browse all 10211

Trending Articles



<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>