QuoteOrigamib Hmm... That's not quite true. Tilting mechanisms can just implement small blades that cover the inactive nozzle to stop oozing. Or set firmware to have a standby temperature. Or both! I do however like the idea that it is raising the nozzle at the same time, where as tilting mechanisms have a chance of flicking the print as it moves. Could your mechanism move quick enough to stopby unromeo21 - Mechanics
Quotedc42 Looks OK to me. But given that you only need to raise the non-printing nozzle about 1mm higher than the printing one, I think you could use a much simpler arrangement, base on tilting or rotating the entire print head by a few degrees. Yes David, that's true. But that does not solve issues that this design or the IDEX design solves, like stopping oozing, keeping the hotend at the workiby unromeo21 - Mechanics
Hi everybody, I found some time ago a really nice concept for implementing a dual hotend extrusion system which I find really clever and compact. It's a variation of the tilting extruder some users experimented with, but I never saw this particular system implemented anywhere. I made a quick 3d model and a short animation, based on the original design, so I take no credit for it and I don't knby unromeo21 - Mechanics
QuoteAmoniak With the PEI, both sides are coated. Are they using some kind of "dip" method to apply the PEI? They dissolve PEI granules in Dichloromethane and than spray it onto the Aluminium sheets and let it dry. I don't know all the details, but I know that Dichloromethane is really nasty stuff, so you have to work with serious protection gear and not inhale it.by unromeo21 - Reprappers
There are some e-bay sellers in Germany that send in the EU as well. Here is one : e-bay But the PEI coated beds are quite appealing.by unromeo21 - Reprappers
Tried to make a new video yesterday, but to my surprise, it didn't exhibited the jerks around the circle any more. I tried with small one, larger one, the integrated circle.g file. So it seems that this behavior is not permanent, and it might be related to other factors. Setup was the same, web interface was active during the print. Also, there were no changes made to the config.g file. I willby unromeo21 - Duet
Yes, maybe I was not clear enough : Bed heater terminals used for hot-end, hot-end heater terminals used for Bed heater. Does this make sense now ?by unromeo21 - Duet
Nobody can help me with this ?by unromeo21 - Duet
Quotedc42 I have fixed this issue in the forthcoming 1.15e release of RepRapFirmware. I have been testing this in the last two weeks or so and it's working perfectly ! No skipped steps or strange behavior. Wonderful ! Thanks a lot for your effort. Regards,by unromeo21 - Duet
Sure, will do it as soon as I get back from my business trip, in a week or so. Meanwhile, I can confirm the firmware version : 6:43:11 PMM115 FIRMWARE_NAME: RepRapFirmware for Duet FIRMWARE_VERSION: 1.15e ELECTRONICS: Duet 0.85 DATE: 2016-10-02 And also, I don't know if this helps, but I get the same issues with the integrated test circle.g file that is delivered with the SD image. Regardsby unromeo21 - Duet
I am having some issues with the small heater terminal connector for the hotend (the wires I use are a little bit to big to properly fit inside) and would like to use the heat bed terminals instead. My heatbed is driven with an SSR, so there are no requirements for high current. I added M140 H1 to my config and the Tool 0 was defined using the H0 (M563 P0 D0 H0) but I only see the Bed inside theby unromeo21 - Duet
Seems like you are just ignoring me David.... Have I offended you with something ?by unromeo21 - Duet
Yeah, that's a good idea. I did not needed this as my Raspberry is running only when the printer is running (on the same power rail) and the printer connects to the network through my PI acting as a wifi bridge.by unromeo21 - Duet
QuoteDADIY Nice solution, I think you might want to add a lock file so that you don't get multiple notifications, create it the first time the printing starts and remove it once printing finishes and you've sent the alert. Otherwise won't you just keep getting printing finished alerts? That's the "spawn cat status" for. It checks for a status file, and it triggers action only when the status cby unromeo21 - Duet
So, if anybody else is interested in such automation , I came up with a simple solution. No extra hardware required, and programming is really simple. Here is the basic workflow: The Pi connects at specific intervals to the Duet over telnet (port 21) and issues a M27 Command. When it reads the word "byte", it knows that the printing is still in progress, else when it reads the word "Not", it kby unromeo21 - Duet
Quotedc42 I tried your file on my Ormerod running firmware 1.15e on a Duet 0.8.5. It moves very smoothly even if I turn it up to double speed. On alternate circuits there is a Z movement or a slight hesitation, always at the same point in the circle. The hesitation is where it switches from the outer to the inner perimeter. It's good to know that your duet doesn't have the issues that I have. Anby unromeo21 - Duet
Is there any way I can implement some sort of notification / automation using a Duet and a Raspberry Pi when a print is completed ? I currently have the Duet connected over Ethernet with a Raspberry, the Pi acting as a WebCam streamer and wifi bridge for the Duet. I would like to know what possibility is for me to get a notification message from the Duet so that the Raspberry knows when a print iby unromeo21 - Duet
QuoteEddygara Could you post pics of the wiring you had to do too get this running? The answer is right at the beginning of this thread ...by unromeo21 - Duet
Quotecozmicray Counter balance? Not a bad idea, but to add another 10-15 kg to the printer to compensate for the already heavy bed is not that desirable. Better to support the lead-screw on it's own mount, it's quite easy to implement. Let's also not forget about the need to eliminate backlash using the weight of the bed.by unromeo21 - CoreXY Machines
Successfully implemented this and it's working like a charm! I always wanted a "touch" probe, as I am using different bed materials and with different optical characteristics, so an infrared sensor is out of question. One thing to add, maybe others will experience this as well: The servo would rattle and jump positions after the extruder stepper was enabled and running, having all the wires inby unromeo21 - Duet
Quotethe_digital_dentist Very beefy! It looks like a lot of mass for the motor bearings to support, or is the motor in a mount that takes the weight off the motor shaft? Unfortunately, the weight is resting on the motor bearings. This is a known issue to me and it's on my "improvement" list. I want to rest the lead-screw on it's own mount and drive it with a closed belt (adding some reductionby unromeo21 - CoreXY Machines
Quotethe_digital_dentist Can you post a photo of the Z axis mechanism and closeup of a couple prints made at the far end of the bed? Cantilevering is simple mechanically which is appealing, but I have yet to see one that doesn't bounce. Ok, here we go... mind the wire mess, I am still waiting for the silicone heater to be delivered from China.. I am using the heater from a pancake maker (1.4 Kwby unromeo21 - CoreXY Machines
David, would you please chime on this issue ? Is it something known to you, or is it something that only my board is experiencing? I bought the Duet for it's advantages, but if it's struggling to make round moves on a simple cartesian, where an 8 bit board like ramps has no issue, than I'm a little bit disappointed...by unromeo21 - Duet
So, I have "printed" that file again, I get the following in the M122 at the Move section : Move Diagnostics: MaxReps: 4, StepErrors: 0, MaxWait: 0ms, Underruns: 0, 4 Before this I made some more tests, do I have to reset the controller before doing the print ? Now, I also ran the circle.g file that is present in the SD card firmware image, it behaves the same. I don't know the diameter of thatby unromeo21 - Duet
So you are suggesting that this is specific to my system only ? No, I am not printing from USB, never did. The resolution of the circle is high, I created the file for this purpose, to test the movement. Don't worry, I did not created it in Sketchup with 30 something faces. It was created in Autodesk Inventor. Here is the G-code file > These jitters / missfires happen on random places onby unromeo21 - Duet
I am running on 1.15c, that's the thing... Is it only my controller behaving like this, or is it a general issue?by unromeo21 - Duet
QuoteDADIY This release doesn't appear to help. Shortly after turning on the bed heater I still see errors reading the temperature which causes a failure. Even with the command M570 H1 P25 T150 the short drop to -11c still causes a fault to occur. It looks that you have some wiring issues there. You should first try to fix them first. I have no issues with 15c so far.by unromeo21 - Duet
I don't know if this is an issue that is present only on my system or does RepRapFirmware struggles with curves in general. To make an analogy, think about a gas engine that runs smoothly, but it misfires once in a while, but only on curves and circles. I made a g-code test file, with a circle as big as my bed, and no infill, one external layer, no extrusion. Speed was about 80mm/s. I was expectiby unromeo21 - Duet
QuotefilipeCampos Cantilevers is the easy solution for small bed, but the bed structure need to be rigid. I using a cantilevers 200x200, supported by 2 x 12mm rods and one 8mm lead screw with 2mm pitch, using this setup for almost 1 year and it works with no issue. I know upgrading to a 310x290 with 2 x 16mm rods and 8mm lead screw with 1.5mm pitch, but this was not tested and can not guaranty itby unromeo21 - CoreXY Machines
Quoterklauco Yeah, correct. But I went another way. I measured how many pulses I need for 100mm movement and adjusted the firmware steps/mm values accordingly. Problem for the tiny MCU (I used 3 ATtiny85s in the video) is that it is not fast enough to count the high-frequency incoming pulses from both the electronics and the motor. But for small applications such as the 3D printer in my video (moby unromeo21 - Let's design something! (I've got an idea ...)