Core-XY based on Rat Rig V-Core and Duet 2 Ethernet



  • Very frustrating day today...... the design above was evidently made around a clone Titan Aero, the original has issues fitting on the mount. I needed longer bolts for the stepper mount and the hotend is shorter apparently, I had to trim some of the part cooling duct off. The belt attachment is for ppl with a LOT of patience but I did get it done in the end. A nice baseline design but I will do that again from scratch and fix the issues I found. So far I can not recommend it for an original E3D Titan Aero. On the positive side, its very compact and gives a few mm more print area.

    Jan



  • Hello,

    I am finally getting somewhere. After resolving some of the issues with the Titan Clone Mount I spend some time getting Slic3rPE set-up. My approach to that was basically a mix of the Prusa settings and some input from the a Railcore II300 profile I found online. I can not claim that I would know all the details what each parameter actually does but so far I have a working printer setup and print setup for 0.2mm and 0.1mm layer height. One of the things I struggled with most was priming of the nozzle prior to the actual print. The way Prusa does it did not really work so I have taken that from a Railcore profile. I can run both print profiles at 100% with very nice looks and at 200% for a very fast print. I have speeds set to 60mm/s for perimeters 30mm/s for external perimeters and 80mm/s for infill and support, 20mm/s for the 1st layer. Some distortions are noticeable after sharp corners for example printing a cube. Printing it at 200% speed that obviously gets worse. It is in no way so bad that it would worry me for now but something that shows there is some unwanted vibration. I will look into that once I have my final bed finally on the printer.

    Another issue I ran into was heat in the wrong place of the hotend. I had the Titan Aero fan set to 70% to reduce noise. That was not a good idea, on an longer print I started missing steps on the extruder and it finally ground through the filament. The problem was the fan was to slow to provide enough cooling. So my heatbreak was clogged and I had to disassemble the Titan Aero to remove the blockage. This has not happen since I run at 100% fan speed.

    I have no good light here to take pictures of prints, I take them with me to the office and post pictures later today or tomorrow.

    Have FuN!
    Jan



  • @deckingman, You mentioned 3DLAC as printing aid you use on your glass surface, I have been looking at it seems there are 2 versions, an aerosol can called 3DLAC and a pump spray called 3DLAC Plus. Which is the one you use successful ? I have ordered 4 float glass surfaces now 320x320x6mm at 27 Euro. I find that is dead cheap, really no point if wrecking my head over flex plates. With the machined aluminium its the first time I try my virtual UK shipping address provided by DPD. I hope that works out.

    Have FuN!
    Jan

    PS: The glass comes from a local supplier, If I get a ride tomorrow I can pick it up. At that price I assume its measured with a measuring tape and hand cut. Probably have to find a way to make the edges less dangerous 😉



  • @snoozer 3DLac in an aerosol is the original. The pump action is a later addition to the range. I have used both with equal success. I suspect there isn't much difference in the actual product so go with whichever is most readily available or cheaper.

    On the subject of glass, I bought mine from a local supplier but asked them to polish the edges. It might be worth asking your supplier if they offer the same service.



  • I have to take a step back for a few days. I was spending way to many hours getting nowhere on Fusion 360 for my Titan Aero mount with piezo. Turns out to difficult to print or to bulky. Having the flue as well in the moment. I leave it rest for a few days. Still waiting for final deliveries for optical endstops, tooling plate, 230V AC heater etc......

    Be back soon
    Jan



  • Hi,

    I really took some time off the printer and started from scratch with the Titan Aero mount including the piezo and having a detachable extruder from the base plate. Some preliminary work is shown below. Base plate and bolted on extruder mount with a flat part for the piezo, it can be seen slightly visible. A couple of guides for the PTFE tube and wiring. A bit of a support for a wire guide will bolt on to the back that's what the M3 nuts are for. On the side is also the mount for my (still) mechanical end stop. Playing with it in hand pushing down on a surface it is VERY sensitive but wont know for sure until its mounted.

    After all that I have to say I am not sure I would use a Titan Aero next time. I find the mount requires just to much asymmetric shapes and it is not easy to get the nozzle centered. Also what I have notices is yes, it is very compact vertically but its not ideal horizontally. Have been looking at the BMG M extruder now with Mosquito hotend, that looks way easier due to the symmetry of everything and yes its way more expensive...... next printer 😉

    0_1560696919667_IMG_20190616_154507.jpg
    0_1560696936482_IMG_20190616_154447.jpg



  • Have you considered using an underslung mount for the Aero? Like this? https://www.thingiverse.com/thing:2849355

    It rotates the Aero 90 degrees and has the motor riding under the rail.



  • @Phaedrux

    I would find that a waste of build height to be honest, That vertical compactness of the Titan Aero was THE main reason why I got it. The BMG./Mosquito design could be placed mostly above the gantry to maintain build height. I think that I have to accept the limitations at this point. What annoys me the most is that the belt fastening/tensioning is part of the hotend/extruder mount. In any future design I would make sure mechanics are independent of hotend and other components.

    Have FuN!
    Jan



  • Right, I am back to my 1st design (Orange PLA further up in a pic), all I am gaining on the Y axis would be 7mm with the new design or so, cant be bothered. The underslung mount and some others similar lose significant Z height, I prefer not to follow down that road. On top of those issues I have not yet received my machined cast Aluminium plate. The supplier in the UK did not want to send to IRL so I used Parcel Wizard in NI with a UK Address. The supplier had all the details correct as confirmed by mail BUT left some details out on the shipment so now DPD can not associate the delivery to my Parcel Wizard Account....... emails back and forth now for a week...... I nothing happens I order a new plate from IRL this time.

    I have been looking a lot more into the Mosquito Magnum and the BMG M, I see a lot of advantages mechanically with that entire idea, The heat-break no longer has to deal with any mechanical load and no more frustration on nozzle changes with spinning heatblock. The nozzle change drama is what stops me from using bigger nozzles on big prints, I hardly ever need fine detail, just strong and fast is what I need most times. The downside is the price, the lot with extruder, hotend, heater etc comes to approx 380 Euro. Have to sleep a few nights over that.

    So all in all a bunch of delays by choice and inflicted from outside.
    Jan



  • I hope snoozer and mods don't mind, RatRig has a sale for this kit ATM


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