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Dual Prometheus hot ends?
Posted: Tue Jul 14, 2015 7:20 pm
by d1rron
So I bought a Prometheus V2 (.4mm) about a month ago and so far I'm absolutely loving it. This is my first hot end after the stock one that came with the Rostock Max V2. I've been really thinking about running dual (or more if it's feasible) extruders, but I'm fairly new to modding. Will any J-head dual-extruder setup work? I know some of the E3d models have wrap-around and such that might be problematic. Is anyone running dual Prometheus'?
Thanks in advance! I've got a fly-n-strude on the way so I can start trying to print TPU/TPE hopefully (with some additional modding apparently) Really enjoying my Max 2 so far. I've learned a ton.
Re: Dual Prometheus hot ends?
Posted: Wed Jul 15, 2015 12:27 am
by Tincho85
Check the Diamond (3 in, 1 out) or the Cyclops (2 in, 1 out), they are both switching extruders.
EDIT:
Here, found it!
626Pilot wrote:If you're interested in multiple extrusion, look at the E3D Cyclops (2 in 1 out) or the Diamond (3 in 1 out). Other options are E3D's Chimera (2 in 2 out) and Kraken (4 in 4 out). However, on these printers, it's better to use a switching extruder (2 or 3 in, 1 out) rather than a multiple-nozzle hot end, like the Chimera. If you have any tower lean at all (and you do!) it will twist the effector slightly out of plane with the build surface, so it will be tweaked a little. That means that multiple hot end nozzles that are perfectly lined up at bed center, will get out of whack the further you get from the center, drastically limiting the size of what you can print, if not making all printing impossible. With a switching extruder that has only 1 output nozzle, you don't have that problem.
http://forum.seemecnc.com/viewtopic.php?f=59&t=8512
Re: Dual Prometheus hot ends?
Posted: Wed Jul 15, 2015 12:30 am
by Polygonhell
Before you install dual extruders you should read the forum for people's opinions.
I had them working and took them off my machine, just not worth the hassle.
I have a Diamond hotend I like the idea, but I have yet to get a workable print out of it, though I haven't given up yet.
Re: Dual Prometheus hot ends?
Posted: Wed Jul 15, 2015 1:29 am
by d1rron
Thanks for the replies so far! I'm going to look into the Chimera and Diamond.
Re: Dual Prometheus hot ends?
Posted: Wed Jul 15, 2015 1:30 am
by d1rron
Polygonhell wrote:
I have a Diamond hotend I like the idea, but I have yet to get a workable print out of it, though I haven't given up yet.
What issues have prevented you from getting a workable print out of the Diamond?
Re: Dual Prometheus hot ends?
Posted: Wed Jul 15, 2015 8:25 am
by JFettig
Extra nozzle drags on the print
Re: Dual Prometheus hot ends?
Posted: Wed Jul 15, 2015 10:26 pm
by Polygonhell
d1rron wrote:Polygonhell wrote:
I have a Diamond hotend I like the idea, but I have yet to get a workable print out of it, though I haven't given up yet.
What issues have prevented you from getting a workable print out of the Diamond?
After I resolved my self induced assembly issue, the issue has been one of the inputs jamming, it looks like there is enough heat creep in the unused input to cause the PLA to swell and then set in the Teflon liner of the unused input.
I also has an issue where Repetier just decided to start ignoring extruder changes, but I can't blame the hotend for that.
I need to mess around with more retraction, if that still has issues, I'll try ABS instead of PLA, the. Possibly additional cooling of the heated break.
Re: Dual Prometheus hot ends?
Posted: Wed Jul 15, 2015 10:54 pm
by IMBoring25
The inactive-extruder temperature delta function (or whatever your slicer calls it) is primarily to prevent ooze but should help prevent PLA heat creep too if set agressively.
Re: Dual Prometheus hot ends?
Posted: Wed Jul 15, 2015 11:48 pm
by Polygonhell
IMBoring25 wrote:The inactive-extruder temperature delta function (or whatever your slicer calls it) is primarily to prevent ooze but should help prevent PLA heat creep too if set agressively.
Won't work on a Diamond hotend, they are like the Cyclops hotend, there is a single heater, and a single output orifice and multiple inputs.
The problem with separate hot-ends is that the unused hotend tends to hit the print and either mess it up or cause it to fail, it's worse on a delta because unless the geometry is perfect the platforms tend to tilt slightly as it moves across the print area, resulting in it being very difficult to calibrate the printer such that both hot-ends are level all the way across the build surface. I've done successful good looking prints with a multi extruder setup (an E3D Kraken), there are pictures on the forum somewhere, it can be done, it's just not IMO worth the effort/increased failure rate, my Kraken is sitting in my parts box.
Re: Dual Prometheus hot ends?
Posted: Fri Jul 17, 2015 8:49 pm
by d1rron
Thanks for all of the replies. I'm almost tempted to try it anyway and try to invent a solution so that it's more reliable -- but that probably won't happen, if I'm honest. Lol