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I have spent 3 months tring to get these to work. Bought two of these as I was in hopes that the first was buggy. No luck, the second one was the same as the first. Having same types of issues mentioned above on PLA and I have implemented all the same hacks mention above and more. I think I have finally fix my issues....

Last week the order for a new J-Head came in. Luckly I was able to babysit a print job long enuff to get a new nozzel holder printed for the j-head. I'm now using the QU-BD's for spare parts.

Looper wrote:I think I have finally fix my issues....

Last week the order for a new J-Head came in.

And is the J-Head working for you?

Please e-mail me your address at chelseat@qu-bd.com and I will send a new barrel out to you to test.

What brand of PLA are you using out of curiosity?

Chelsea - QU-BD

Ultimachine.

Mail sent.

We haven't had any problems with the Ultimachine filament at our shop.

The couple people that have e-mailed me, your new barrels are on the way.

Chelsea - QU-BD

cvoinescu wrote:

Looper wrote:I think I have finally fix my issues....

Last week the order for a new J-Head came in.

And is the J-Head working for you?

Just got done running two consecutive 2hr print jobs using glow in the dark PLA and not a single issue. This is the first time since I have built my ORD Bot that I have not had to watch every layer go down to see if I have a jam.

I made an adapter block to replace the aluminum block of the QU-BD that allows for the j-head to be mounted. I plan on desinging a better rig that will raise up the hot end as this setup take away from my Z. Really at this point I'm just glad to have a reliable hot end that is not jamming with PLA.

I bought my J-Head from the source at http://hotends.com and needed to buy it by the parts as he currently does not have any pre assembled. I made sure I got the 1.75 version with a .40 nozzle as my stock of 1.75 PLA has grown. When it arrived it was assembled, my kudos to hotends.

Cannot say that I'm crazy about testing any more QU-BD parts or products. Done that for the last 3 month and don't want the t-shirt.