Une précision: Si le lit est incliné, la routine de calibration 'fabrique' des rayons et inclinaisons de colonne fictifs et peut trouver une solution. Cette solution mathématiquement correcte permet d'imprimer la première couche suivant la forme du lit, mais comme cette solution ne correspond pas à la réalité, les dimensions sont fausses. Actuellement, Je fait systématiquement une calibration 6 pby PRZ - RepRap Groupe d'Utilisateurs Francophone
Le G32 ne stocke pas les données pour une future session, mais il prend en compte les mesures pour la session courante. Chaque itération est supposée améliorer le résultat. Il faut absolument utiliser 3 ou 4 points de mesure de plus que le nombres de paramètres, sinon les résultats sont incohérents et la calibration ne converge pas, donc il faut modifier les routines standards de la Fisher en ajoby PRZ - RepRap Groupe d'Utilisateurs Francophone
For the fan screw, beware that the head of the screw maintaining the cable shall be on the arm side to avoid clearance problems. There shall be no washer under the head.by PRZ - Fisher
Just a note about the forum telling you that you are a robot. I get this error from time to time, and I complained to administrator, but didn't get any answer. The important point however is that even if the forum tells you that you are a robot and you didn't get post acknowledgment, the post may have gone through anyway. So, if you get this error, open another browser window and check if your poby PRZ - Fisher
I did not see the need for two adjustment end. Having one simple end may save 1 gram per end and a bit of printing time. No big deal, but why not. That is a bit marginal, anyway. If you look the OpenScad module, program differences are minor, so no big work.by PRZ - Fisher
On the Fisher, there is no brass end on the hotend side, PTFE tube is directly screwed in the radiator. So it is not possible to access the tube hole after screwing it. You have to drill the hole before screwing it. Having the same method for both ends is simpler. At startup, I screwed too hardly and that was totally blocking the filament. Then, next trials showed that the filament friction is veby PRZ - Fisher
Yes, worked and reworked, mod after mod, it looks a bit bad. And you haven't seen the last version, as I have replaced the spool support with a vertical axis one, I added new holes Also the new arms works well, but looks quite weird, a bit like replacement prothesis. Thanks a lot for this proposal, but I think I will do other stuff with the Fisher components, however I shall finish my other priby PRZ - Fisher
And yes, your temperature is too low, the part shall be more translucent than that. I don't know Prima PETG, but you shall test high temperature to see if it become shiny. For esun shiny print is a indication that temperature is ok, in addition to the translucent aspect.by PRZ - Fisher
Yes I disassembled the duct after the hotend. For esun PETG, I was even obliged to tape the holes in the effector to avoid any cooling. You see that on the arm topic. Don't forget to rescrew the effector. How to do proper insulation how NOT TO DO insulation, that ended with petg gluing on the tape and ending on my prints I think that is better to have some cooling if the material toleratby PRZ - Fisher
A note for those who fear a more powerful extruder will risk to grind the filament. In my setup, I reduced current to 1 A (to generate less heat on the board), so the power of this extruder is approximately 2.5 time the original, which does not make it a strong extruder, just average. I recently got two thermal divergences where the temperature goes above 300°C, hence the hotend heater shut doby PRZ - Fisher
There was play in the gears, which created a boring clik-clak noise while retracting, so I designed two larger size pinions. I ended up using the larger one. No more unpleasant clik-clack, while the retraction is still audible (you hear it more than for a direct extruder, because there is three time more rotations and motor acceleration is higher). There is now three pinions size - 0, 1 and 2 -.by PRZ - Fisher
At the end, I think the simplest solution is to route the cables OUTSIDE the printer. You shall drill the panels for re-entry, but this is not a problem if using sharp bits. If found unelegant, electrical rails could be used to hide the cables. As others, I got many problems with the cable routing and I used nearly half of the supplied zip-ties routing and rerouting. It shall be noted that follby PRZ - Fisher
Another note about the oozing and retract for PETG. All-metal hotend manufacturers recommends to have a retract length lower than the transition zone. So, they recommend generally a retract not exceeding 2mm. That may be the need for a direct extruder, but that don't work for 'bowden tube' extruders. I had a bowden tube extruder, which while short (460mm), was a bit tortured. This means that thby PRZ - General
I assume that a lower melting temperature filament does have a lower deflexion temperature, but without any manufacturer data, this is only a bet. I think that, till filament manufacturers get their fingers off (sorry for that, but that upsets me), you shall assume a deflexion temperature of 69°C for PETG.by PRZ - General
DTA labs, who sells an adsjustable length hotend (Prometheus), have made a nice synthesis of an hotend adjustments: Disclaimer: I bought a Prometheus, but it waits that I finish my new machine to be tested. In short: long heating zone : strings , but if you don't have the long heat zone, you shall have very high temperature, so the strings are there in any case. Another point is the retractioby PRZ - General
I print blue translucent and yellow translucent esun (edit: both textured). The extrusion is not the problem, it is very easy at relatively low temperature. The problem with esun is that if you are not sufficiently hot : - The layer adhesion is poor - The material is brittle The material is difficult to heat and as soon as you have some flowrate, it cool down the filament and it makes like if tby PRZ - General
Unfortunately, this is not as simple as that. The variability of PETG properties is important, and according different material datashets, the heat deflexion temperature varies from 69 to 99°C, which makes a huge difference. This is why I am so worried that no PETG filament manufacturer supply datasheet. Is that so complex to carbon copy the producer datasheet ? That is really not acceptable.by PRZ - General
Ok, Following a comment in the arm topic, I have done a macro with ten points/6 param, and while the deviation is larger, the results are more consistent and the tower inclinations are more realistic. I never trusted the tower inclination I get with 7points/6param as they were way too large and inconsistant. Following that I was using 4points/3 parameters with tower inclination blocked to 0, butby PRZ - Fisher
This was the suggestion for the bottom bracket, and some have done that. However, for the top bracket, you shall go through the acrylic plate to have an accurate build, as going directly through the laser cut parts will give better accuracy than printed part bolted on the plate. The solution proposed by bgkdavis to have a top stop plate atop the acrylic plate, but not linked with it, is good,by PRZ - Fisher
David, 1. I run the 1.09d firmware. Was there modifications on the calibration since ? 2. My aluminium bed is reasonnably flat (that was the motive to change it, the original bed was completely warped). My bed was NOT perpendicular to the the towers, and that was the point of my post, to explain what could be the consequences. 3. Done 4. I systematically run the 7 points/ 6 parameters calibrby PRZ - Fisher
You could have a better result than trying to measure the distance on a paper, by simply measuring the calibration part, which is, by the way, how we do the test. I think that having a mean to enter the X,Y size of a given part in the calibration procedure is a route which may help evaluate more accurately the faulty geometry.by PRZ - Fisher
I don't think this is the firmware, or more exactly, I think this is the side effect of the matrix rotation driven by the calibration procedure. I searched the Internet, and this unsquare problem does occur with other firmware than RRP/DC42 branch. Understanding the side effect of unaccurate geometry with the delta algorithm is really not easy and to be honest, I don't visualize what occurs herby PRZ - Fisher
While printing calibration part, I got significant differences between X and Y dimensions, and I discovered why. When I replaced my bed by an aluminium one, I set wood insulation and the compression of this wood insulators created small height differences between my balls. Realigning the balls height corrected the biggest error, while there is remaining default. I assume that the calibration alby PRZ - Fisher
So I modified the arm end with an introduction channel to help insertion on the balls. Tested on PETG version, it works well. Here they are : OpenScad code on Github:by PRZ - Fisher
I am thinking that a better solution to limit flex while introducing the fork on ball is to make sort of an access channel. The load being perpendicular to this channel, that won't change the overall stiffness and there will be no risk of popping out of the ball.by PRZ - Fisher
There was stl for the PETG/ABS in my first post. STL file attached for the PLA option (less stiff), but I am not extremely confident of proper operation in PLA. I have not tested. You may wait the tests of Greg_be on this material. PLA quality is also quite variable. A solution in case of crack on PLA could be to lengthen the fork (and increase thickness accordingly).by PRZ - Fisher
Ok, I found my mistake in the 10 points calibration routine, my probe points were not properly numbered. The 10 points calibration deviation is remarquably constant at 0.043 (4 different tests). The corrected calibration routine (Pn numbers , they shall go from P0 to P9) I slightly increased the offset for inter-columns points at 0.22 (for 0.2 at center), which gives better resultsby PRZ - Fisher
I have taken the 3 other probe points from your post, and the results are less brilliant, while they are relatively constant. However, while probing 10 points, the message still say this is a 7 points calibration, so I don't know if it takes the seven last probe or if this is an erroneous message ? Best result is 0.031, worse 0.037. Iterating the probe macro always worsen the results, so allby PRZ - Fisher
7 points calibration, direct from start. This is with my ravaged Buildtak ! below 0.01 is normal, that was the same before changing the arms. I even get sometimes 0 (I got it one time with the new arms) You see also the new parameters. With properly defined switch offset and other parameters, I am normally below 0.2 before calibration. Here that was a bit exceptional. What is the trick ? - pby PRZ - Fisher
I pushed the revised program on GitHub, that will be easier to see the modifications:by PRZ - Fisher