Magically changing feed amounts

dc42

It looks to me from the photo that you are using an un-geared extruder. Those typically need a long, high-torque Nema 17 motor run close to its maximum current to deliver enough force, especially when printing PLA. So try increasing the current to 1.5A or 1.6A.

aparkin

thanks for the tip ill look into geared bowden are better motor if you have found any you think are cool are work great please share
thanks for your help

iDevelo

@aparkin:

thanks for the tip ill look into geared bowden are better motor if you have found any you think are cool are work great please share
thanks for your help

If you have the cash http://shop.bondtech.se/ec/extruders/bondtech-qr-175-universal.html

aparkin

Ouch thanks for the link but it will cost me and extra in import tax I'll stuck with UK stuff
Are print something out

dc42

@aparkin:

Ouch thanks for the link but it will cost me and extra in import tax I'll stuck with UK stuff
Are print something out

I recommend either the E3D Titan or the spring-loaded variation of the RapRap Ormerod extruder which is mostly printable. Both have a gear ratio of around 3:1.

deckingman

I can't really tell from the pics but another possibility is that whatever drives the filament is slipping on the motor shaft. It's a quick check to make sure that the grub screws are all tight.

A little tip - with a bit more aluminium extrusion you could mount the extruder above the bed, roughly in the centre which will reduce the length of your Bowden tube to less than half what you have now which will help in all sorts of ways.

aparkin

Thanks for the tip

aparkin

yep you was right it was maniacal i retro fitted an old wades extruder its running upside down and back to front but now it works like a charm so now to find that ormerod extruder

thanks for all the help

of course i can not shut the door but ill fix that soon

aparkin

OK the problem is still persisting on long prints my printer fails a couple of hours in but small prints.look much beter
Is it worth putting a fan over the duet board

dc42

If it's a Duet WiFi, then with the motor currents set as low as you have them it is most unlikely that you need to cool it with a fan.

aparkin

Untested yet! just sermizsing.
But I'll add a fan on board change the motor for one of the z motors
I also get strange things happen when I have motor wire crossed over and I thought I got good ones for Germany….
Never mind anyway I'll try all the above and make sure nothings come lose see if I can shorten my bowden tube
And I'll get back to you let youknow how I get on
p.s may take a few days
Thanks for all the help

aparkin

ok slight update not sure if this is related guess time will tell after a bit of head scratching wondering why nothing is working i found out i have a corrupt memory card pc is scanning and fixing is it worth retrying same card are just replacing it
p.s so happy i copied my setting to an earlier post

aparkin

hi all thanks for the help (dc42)
ok problems

memory card stopped working ( replaced card sorted )
extruder getting hot and over extruding and under extruding and completely failing after 3 hours

turned out i had my blue wire ad snapped inside the sheaf …....while cheeking and rerunning all the wire it fell in half in my hand strange

its now 4 hours into a 6 hour print and back to normal
p.s i got an extra motor in the post now