E3D Hot End Trouble - Bowden

[ghosty]

Hi All,
I am having trouble and hope that some one can assist. I have purchased a new E3D genuine hot end (after 3 Chinese rip offs failed within a couple of hours of use.) I am using the MK8 extruder remote mounted and feeding the E3D on my Prusa I3 x pro.
It printed perfectly yesterday, and I can get it to print a test block almost perfectly in PLA today, but for the life of me I cant get it to print the new print head mount I want for the titan extruder / E3D hotend.
Due to my design having a cable chain link as part of it, the print needs to be built on a bed of supports. My problem is I cant lay the support it just wont stay down at the ends. I am building on buildtac, which I have had an enormous amount of success with and more often than not I struggle to get the print off of it. So I don't think the bed is the issue.
When the printer lays down the first row of support the very ends where it does the loop back lift up (curl) The next layer just picks this up and starts to make a mess on the third pass it turns to custard literally as it all melts around the hot end.
I have tried both PLA cold and 60 to 65 bed, and ABS 100 bed. both do exactly the same, my print speed is 50mm/sec, and my first layer is down to 30% speed.
I have a .4mm nozzle and a layer height of .22 feed rate is 1. See attached image for the support settings and a semi pic of the part being printed with the support. I have tried pillars from 1mm through to 4mm thick. The temp is set at 250 deg for ABS, and 210 for PLA, any less than than 205 for the PLA and the extruder starts skipping. I have tried layer heights of .32 and .2 the thicker the layer the more exaggerated the issue and the sooner it fails. 0.32 often fails on the first layer, as it wicks back onto the hot end end gets dragged along rapidly building a blob.
To-date I have been using the MK8, but it had a melt down trying to print ABS, i was having lamination issues on my prints and needed to up the temp to 250 deg, hence the melt down and now the E3D bowden.
Bed level is spot on, be luck to be a paper thickness, I have been printing on and off for 3months with PLA and the MK8 been through a couple of roles of filament no issues...just cant get this dam bowden working.
Thanks in advance

[CompoundCarl]

Well if the support isn't sticking, then I'd say either print the first layer slower or move the nozzle a bit closer to the bed. Basically, just follow the instructions here: https://www.simplify3d.com/support/prin ... to-the-bed

[ghosty]

Hi,
Thanks have done all of that. If I print a Raft it sticks fine...some thing in the settings for the "support" I think but cant work out what. The support does not seem to go down with the same level of "flatness" the raft does.
Thanks
Ghosty

[CompoundCarl]

The raft is completely different than your supports. It prints at different speeds, has a different thickness, uses a larger extrusion width - there's almost nothing that is the same between them. So saying that your raft works is fine, but that doesn't really mean much for your supports. If you want to have the supports stick to the bed without a raft, then you need to adjust all of the first layer settings mentioned in the link above.

Or just use a raft since that seems to be working for you. The supports will be printed on top of it.