HercuLien first test prints. Calibration is needed... But a good start.

HercuLien first test prints. Calibration is needed… But a good start.

Damn sight better than my delta!

That is great start Eric!!!

Nice job @Eclsnowman ! That’s before calibration? Those are some really nice looking bridges! It’ll probably look like injection molding once you have it dialed in! Is that PLA or ABS? What slicing and host software did you use?

@SirGeekALot I use simplify3d as the slicer and octoprint as the host.

I guess it is disingenuous to say uncalibrated. Just that these are the first prints to determine the speeds, feeds, and temps the hardware likes. All the steps/mm etc are calibrated from the pulley and lead screw math. I tend not to fudge that stuff to make things look better. If those are off something in the math is wrong.

But on my eustathios it took weeks to determine optimal slicer settings the machine likes.

Update: pla

Ahhhh the pla jams are back. I love e3d… But I have always fought pla on the e3dv5 on my last printer, and now this one. My v6 has been a dream. Just a cold pull with nylon when switching materials.

I may look into jheads for this build. I plan on printings some larger parts for work on this one. I really cannot afford to jam on what might be a multi day print.


So it’s not just me then?

This weekend’s lesson was ordering heated rubber pads from alirubber…letting the delta and the IGentUS both print abs.

@Mike_Miller I like abs soooo much more than pla. But when I try and print 12" cube parts for work abs warp can be a real problem.

@Eclsnowman What speeds was your machine dialed in ? that looks fast… also, looks like the second head is higher. you have a drop mechanism on it ?

The prints really looks good ! :slight_smile:

@Jean-Francois_Coutur I have it raised when not in use. I will drop it when printing dual color. The hot end is pinched in place by the three bolts on the front holdind the front mount/fan shroud.

Speed was around 60mm/s but acceleration is 10,000 :slight_smile:

@Eclsnowman Very cool, I’ve got it down to 3000 for acceleration… I have to try it faster… just for the fun of it ! BTW, I like the way you tension the Z-axis belt… look simple and fast to set. :slight_smile:

@Eclsnowman I am using PLA for paid prints as the material is readily available and cheap. In addition, the use of the heated bed (needed for ABS) running 24 hours around the clock, adds up quickly on to the bottom line. Some prints are 36 hours.

I have been fighting my hot end, running both the V5 and V6, concerning jams. The V6 is a LARGE improvement, but I have been looking at going back to my Budda or purchasing a J-head. Who have you looked at purchasing from?

@Brandon_Satterfield @Eclsnowman I got my self some new j-head a few weeks back and what I can say is #1, get them at the source http://hotends.com and #2, they don’t have a push to connect tap for bowden tube setup (I screw the fitting on m y custom carriage. Just pointers if you guys are thinking of going the j-head way :slight_smile:

@Jean-Francois_Coutur thanks for the advice I will search this out tonight.

Wow, acceleration at 10000… that is a lot. Does anyone know how high it’s reasonable to go on the x-axis for a bowden prusa i3?
I just need some sense of scale here, I really can’t go above 2000 on my current Prusa i3 (not bowden).
At this point I’m really quite sure I will build a machine like this:)

I haven’t really tested this, but my gut says high acceleration (say, beyond 300) has negligible benefits and will exaggerate any otherwise minor errors caused by hysteresis in the filament feed (aside: is there any setting in any slicing software to account for bowden tube length, or even hot end nozzle distance from extruder pushing/pulling it in?).

On the other hand, I think velocity will, of course, speed up prints, but that is also where you may easily see problems magnified if your machine’s rigidity (or other important tolerance factors) are not up to the task. I had huge problems until I slowed my first machine waaay down (aside2: but that may attributable to slop in my 'bot that I’ve been unwilling to bother addressing…yet).

Again, I have no data to support this claim–just instinct/intuition based on my experiences/anecdotal evidence–so feel free to disagree.

@SirGeekALot if your bots rigidity and motor torques are up to the task then acceleration will have a much greater impact on total print time than velocity. During a print you spend very little time going at top speed in one direction. How long it takes you to get there is a bigger component of the time. Just like how a drag race car would suck at an autocross event.

When you need to turn down acceleration (or jerk) is when you get ringing at corner changes or fast moves. Also if you begin to miss steps or hit resonance frequency of the frame.

After looking at some of these prints it looks like there are some extrusion artifacts, maybe related to the bowden feed?
This got me thinking about bowden feed in general…
I have yet to try anything but “direct extrusion” but it seems like even then retraction and extrusion pressure can make a big difference.
In general I am a bit worried that the added inaccuracies from a bowden feed will be the weak point in this kind of machine.
What does everyone think about bowden vs direct?
Is it is possible to get “perfect” quality with bowden feed?
Are you guys using 1.75 or 3mm filament?

@Oystein_Krog thats a topic onto its self ! :wink:

Personally, I have both at home, and they both work great… On a bowden system, if its tuned right, it can do very good prints (in my case, my bowden outruns my direct drive printer) but, its another story when printing with flexible meterials.

@Eclsnowman nice explanatory metaphor. Easy for a Corvette driver like me to wrap his head around. :smiley:

After tightening everything I could think of, I was still having some terrible print problems at speeds of around 60-90 (and maybe 150 on non-print?) and I think I had my acceleration around 9000 (Slic3r popup tips implied a well-tuned 'bot could handle this). So, I brought everything down to 30 for speed, and only 300 for acceleration to see if that would help, and the results were dramatically better.

But, perhaps I’ve been too conservative with my settings. In hindsight, my original fast settings now seem ridiculous for my old Printrbot LC+, and perhaps my slow settings were equally off the mark. I think on my next print I will try something more balanced.

I don’t really want to bother spending the time futzing around with tweaking my settings until they start to fail (as proper scientific method would dictate, but my available time to devote to this is limited), so I think I’ll try something like Lulzbot’s PLA/Fine speed and acceleration settings for Slic3r and just see if my printer is up to it.

Their Slic3r acceleration settings for their PLA/Fine config are:

Perimeters: 700
Infill: 1100
Bridge: 600
First layer: 900
Default: 800