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| BadMouth:
Had a look at that Cubicon Prime... Proprietary nozzles? Randy, please stop buying these things. |
| RandyT:
--- Quote from: BadMouth on March 17, 2022, 07:03:35 pm ---Had a look at that Cubicon Prime... Proprietary nozzles? Randy, please stop buying these things. --- End quote --- I tried! They wouldn't take no for an answer and gave me a 100% discount :). There is a saving grace with that machine, though. It's built quite well and reportedly is using an MKS Robin Nano V3.0 main board for it's brain with TMC2209 motor drivers , running what looks like fairly normal Marlin 2.0 firmware. From the looks of it, it wouldn't be too hard to slap just about any extruder on that substantial cross member/carriage plate, tweak the steps/mm and be back in business. Much easier to do on the Cubicon than either the Zortrax or the UP! units I have. And to be fair, they do provide a spare and the nozzles don't seem so complex that I couldn't knock off a dozen or so in a couple of hours, based on readily available parts, but who wants to do that? But in the end, I agree. It's hard to get past anything on a printer made from unobtainium. *edit* Forgot the need for an alternative bed leveling device like the BLTouch/CRTouch in the mod, but still not terrible as I would want that anyway . |
| nitrogen_widget:
--- Quote from: RandyT on March 17, 2022, 11:25:14 am --- --- Quote from: nitrogen_widget on March 16, 2022, 07:06:21 pm ---agree on dual z's. i'm redoing my chirons hot end along with wire harness and didn't want to go the direct drive route because i just replaced the extruder and calibrated e-steps. but, if i'm replacing the whole hot end bracket i'm thinking of printing up the direct drive also. edit: yeah i have a right hand duel drive extruder. just need the slim stepper so going direct drive. it took so much to convince also. lol. was planning on v6 volcano with copper heat break. I have a BLtouch also and it looks like there is some voodoo i can do to make that work with the stock board so i may go there also. though i manually leveled the giant glass bed good enough to fill the whole tray with parts and not have adhesion issues. --- End quote --- Just watch for "ringing" in the print surface if using a direct extruder on such a large machine. If the parts are functional rather than purely cosmetic, it's not really an issue and direct is usually a better overall setup. Auto-bed leveling is more a quality-of-life thing, but I think that it's especially important on a dual-Z machine and that leveling is performed at least once when the machine is powered on, although it's best done before each print if you can afford the time. I believe the Chiron has dual Z homing sensors, so that would take some of the possible issues out of the equation. But if you're ok with doing it manually, and the firmware supports manual mesh leveling, then the bed probe sensor isn't really a necessity. Through a series of fortunate events, I ended up with the Cubicon PRIME unit anyway. It got itself "un-lost" and showed up on my doorstep yesterday. Amazon told me to just keep it when I informed them. Never before have I felt so dirty opening a box, but I set it up and checked it out. At first glance, it looks like a normal "bed slinger" of the ET4 style, with a nice fully enclosed steel bottom section and a touch screen which also has a knob for navigating the advanced functions of the firmware. I have to say, the unit is very well-built and feels more solid and heavy than something like an Ender 3 v2. There is a lot of attention to detail that seems to be missing on other units and it comes mostly assembled out of the box. One thing which jumps out immediately is the huge direct extrusion hot-end/fan assembly which necessitated a double height cross extrusion just to support it's weight. It's clear that the machine's frame was designed around this assembly. One of the first things I do with a new machine is force it to print one of it's demo files in ABS by tweaking the temps and fan at run-time, instead of using the supplied PLA the files are meant for. Aside from being a bit difficult to change the values on the fly without grinding the filament, the resulting print passed with flying colors. No curling, perfect bed adhesion and a very uniform surface. It also printed faster than I would usually go with ABS and it did it without a problem. The transducer in the extruder section worked exactly as it should. There are NO bed adjustment knobs on the unit whatsoever. You just tell the unit to perform it's mesh leveling procedure, which it does directly from the nozzle tip, and afterward set the Z-offset from the center of the table with a slip of paper or the included card. That's it. Done. I really didn't want to like this printer, but I really do. The only thing which would keep me from recommending it is the question of long-term reliability and accessibility of the specialized parts. But if they hold up over time, it's possibly the nicest printer I have seen for the $320 (with the current $80 coupon on Amazon). Especially when it would cost more in total to add those features to an Ender 3 V2, and still not have the same build quality. Out of the box, and replacement parts aside, I'd have been extremely happy having this as my first 3D printer. --- End quote --- I was told the fact the chiron is such a big machine the direct drive affects it less than a smaller printer. however many people have done this mod without any issues plus i'm using a shorter stepper with less weight. yeah i don't need the bl-touch but i bought it for a different printer (mini delta) and then found better firmware with a higher mesh for auto leveling and decided i didn't need it. so i want to use it because i have it. And honestly most of my prints on the chiron go hours to days so a few minutes auto leveling are no big deal. i do all my small stuff on my mini-delta anyways. i wouldn't feel too bad. i've heard of people getting shipped two printers accidently and amazon told them to keep it. the cubicon - never heard of it but let us know how it works. auto leveling is a nice feature. |
| RandyT:
--- Quote from: nitrogen_widget on March 18, 2022, 07:12:07 pm ---I was told the fact the chiron is such a big machine the direct drive affects it less than a smaller printer. --- End quote --- Hmmm... I've always interpreted the issue as being from oscillations at the nozzle or bed caused by an overall lack of frame or motion component rigidity. As the size of the structure increases, the more difficult it becomes to maintain that rigidity. The addition of weight on any of these moving, suspended structures would tend to exacerbate such an issue. Even so, it can be managed even if it happens, through acceleration and jerk value tuning. With slower accelerations and direction changes, rigidity becomes less of an issue. I doubt the large machine will have any issues which can't be addressed in one way or another. I suppose I'll find out first-hand, as I just set up an SV-03 last night. Not quite as big a machine as yours, but probably larger than I'll likely take advantage of very often, unless it proves reliable enough to fill that large bed with parts. |
| nitrogen_widget:
--- Quote from: RandyT on March 18, 2022, 10:33:31 pm --- --- Quote from: nitrogen_widget on March 18, 2022, 07:12:07 pm ---I was told the fact the chiron is such a big machine the direct drive affects it less than a smaller printer. --- End quote --- Hmmm... I've always interpreted the issue as being from oscillations at the nozzle or bed caused by an overall lack of frame or motion component rigidity. As the size of the structure increases, the more difficult it becomes to maintain that rigidity. The addition of weight on any of these moving, suspended structures would tend to exacerbate such an issue. Even so, it can be managed even if it happens, through acceleration and jerk value tuning. With slower accelerations and direction changes, rigidity becomes less of an issue. I doubt the large machine will have any issues which can't be addressed in one way or another. I suppose I'll find out first-hand, as I just set up an SV-03 last night. Not quite as big a machine as yours, but probably larger than I'll likely take advantage of very often, unless it proves reliable enough to fill that large bed with parts. --- End quote --- yep. I will find out. people are claiming 100 mm/s print speed with direct drive and volcano. not expecting that speed. But if i can do it. should get my right handed dual drive extruder today. I only had the left handed which doesn't fit the bracket. Bracket and cooling vent are painted but man paint isn't drying. too cold outside and basement. going to bring the parts in and put them on the heat vent to dry. the wiring in this chiron has issues. every wire placed in a screw terminal is tinned. I don't care about the non-load carrying stuff like sensors and stepper wires, but the wires for the heat bed and hot end need to be fixed. there are also many points of failure in this printer's wiring. WAY too many junctions for sub PCB's just for the connector to the wiring harness (main reason i'm doing this). going to eliminate them and go directly to the control board with as much as I can before going to perf board with screw terminals on the print head. tired of stupid little clips that are non-standard size where i have to solder a clip every time i replace a thermistor or heating element. going straight screw terminal so i can just strip the wire and jam it in there and be done. all this said, i've never had a wiring issue or a fire with my chiron despite this happening to others. I just have broken wires in my main harness. there are a dozen videos on this but i'll take pics of each step and post them up. |
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