E3d hemera bowden5/5/2023 ![]() I had good prints with my old v6 but now I spent over two Month of twiks and fights to get normal prints but far from good as I had with the v6, the only stupid reason I am not tearing it from my printer and throwing it to the garbage is the fact it cost so much and I really feel like idiot that believed e3d product support is a level above chinese knockouts, my bad. I wish I could return it and get my money back!.Ĭost like an ender with zero support and print worse then a stocked one. So still silence from e3d for a bit of help with their premium priced product. There is one caveat to all of that in that there is an interaction with pressure advance which I'm not entirely sure about, except to say that again, low values are detrimental but higher values are said in Hemera settings for Reprap Firmware?: The only time that extruder acceleration is used is for extruder only moves ( retractions).įor those reasons, I set my extruder "jerk" and acceleration to silly high values. So extruder acceleration during print moves will only apply if it is set so low that it slows down the X and Y axes acceleration. Regarding extruder acceleration, for any print move, the acceleration is always the lowest of X, Y or E. During retractions, the extruder starts and ends at zero speed, so again extruder jerk is never applied. During print moves, where the X or Y axis may change direction, the extruder continues to move in the same direction so extruder jerk does not get applied. The instantaneous speed change threshold, to give it a more meaningful name, is used in instances where there is a change of direction other than when starting a move from zero speed and not at the start and end of a move. Just on the subject of extruder jerk, it's never used. For those who want to print and not have to tune and tweak. There's still room to tune it further if you like. Just the details from their internal empirical testing that says here are the settings we've found to work best across a range of materials. I'm not concerned with that level of accuracy. We're talking about the motor's ability to ramp up to a certain speed at a certain speed against certain forces.Īll things tunable to that motor, and should be fairly consistent. I don't believe that to be true, those settings are most definitely extruder specific. I'm not raging, just posing the question. I know it feels good to rage at manufacturers but may be worth pausing to consider whether there’s a reason things are the way they are? Thats true, I'll wait for their said in Hemera settings for Reprap Firmware?:Įxtruder retraction speed, retraction distance, jerk and acceleration are not extruder-specific, they depend on a lot of other things like print temperature, polymer, motor current, etc. Rant over, does anyone have a good starting point for these settings for the said in Hemera settings for Reprap Firmware?:Īnd then there’s the whole aspect of ranting about one mfgr’s product on another mfgr’s message board - how are e3d engineers expected to get this feedback? These settings should be available as at least a starting point. You know they performed a multitude of calculations and tests. You know they sized the gears and hobb for a reason. You know they spec'd the motor they did for a reason. Where's the rest? I'm talking about things like the maximum instantaneous speed change (jerk), extruder acceleration. ![]() They even list the maximum volumetric extrusion which could give you the maximum print speed dending on nozzle size. Luckily they did include the motor specs which list the current, that's easy enough. The only concrete information we have is a starting point for steps per mm. If you ask 10 different people, you'll get 10 different answers. Instead, we're left to figure out what works by trial and error. I mean something specifically from the manufacturer. I really wish manufacturers would start including the settings for these things. ![]()
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