Duet3D PCB delta printer effector sneak preview
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Is there an eta on availability/approximate cost.
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Guess I know what I am buying in the near future then ;D
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I got the built-in nozzle contact sensor working today. If I move the nozzle to 0.1mm below Z=0 then the probe sometimes triggers, and if I move it to 0.125mm below Z-0 then it always triggers. I think this is probably a reasonable sensitivity, because I am using a PEI bed. PEI is known for being soft and causing difficulties with accelerometer-based sensors because of that. I've already identified some design improvements to make the next prototype more sensitive.
We don't yet know what the cost will be. If we can avoid the expense and risk of drilling piezo disks - as we hope to - then it will help keep the manufacturing cost down. At present the component cost is reasonable, but the manufacturing cost may be a little high because there are SMD parts on one side and through-hole connectors on both sides. So at least 2 of the connectors will have to be hand-soldered.
I've also been talking to E3D about a slightly modified hot end mounting method that puts less of the hot end below the effector than the current setup.
As for ETA, we need at least one more round of prototyping and some beta testing before we go to manufacture. Given the turnaround time on PCBs, that makes it at least 8 weeks away from general availability.
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I think it's reasonable to sell something like that with the hand soldered pieces separate, and charge a small fee to solder them. That's not totally uncommon (Headers on many breakouts, for example) and people at a place in this hobby to want to buy your effectors should be able to handle basic through-hole soldering.
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I'm fine with no piezos. And let me know if you need any prototypes on this side of the pond- there's a few PCB houses in california that have done PCB prototypes for me for very cheap.
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Any chance you or T3P3 will make custom length Haydn Huntley magnetic arms and sell it all as a kit with the PCB?
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I used the onboard nozzle contact sensor to do auto calibration and mesh bed levelling on my 300mm diameter bed delta today. After I remembered to remove the H corrections from bed.g and put in the new diagonal rod length, the deviation for both was around 20um. I'll do more tests tomorrow to check how reproducible the sensor is.
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Any chance you or T3P3 will make custom length Haydn Huntley magnetic arms and sell it all as a kit with the PCB?
We will certainly explore collaborating with Haydn on purchasing his mag arms in larger volumes to bundle with the effectors, once we get closer to a production version. That makes sense for people in the UK/Europe at least (it makes less sense to import them from the US just to ship them back).
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I'll keep my eye one this!
John
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I'm curious about that custom e3d heatsink. Does it have the piezo disk integrated? I'd love an e3d hotend with simply three screws to mount it rather than the groove mount, but I'm not certain that I'd like to experiment with piezo disks. Can you clarify what that is in the photos?
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I don't like the custom heatsink, not easy to leave a standard.
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It's not a custom heatsink, it's a prototype of a new design that E3D is working on because a lot of people hate the groove mount.
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@bot:
I'm curious about that custom e3d heatsink. Does it have the piezo disk integrated? I'd love an e3d hotend with simply three screws to mount it rather than the groove mount, but I'm not certain that I'd like to experiment with piezo disks. Can you clarify what that is in the photos?
No the E3D new heatsink prototype does not have a piezo disc or any other type of contact sensor integrated.
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This is music to my ears! Thank you for collaborating with e3d on this.
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Any chance you or T3P3 will make custom length Haydn Huntley magnetic arms and sell it all as a kit with the PCB?
We will certainly explore collaborating with Haydn on purchasing his mag arms in larger volumes to bundle with the effectors, once we get closer to a production version. That makes sense for people in the UK/Europe at least (it makes less sense to import them from the US just to ship them back).
I would buy it that's for sure - located in EU/SWE. I have a copy of David's delta and would love the same setup, incl
rails instead of wheels. -
I would buy it that's for sure - located in EU/SWE. I have a copy of David's delta and would love the same setup, incl
rails instead of wheels.I've just published the build details at https://miscsolutions.wordpress.com/2017/03/22/time-to-rebuild-my-large-kossel/. I haven't finished the commissioning instructions yet, and the section on the effector and hot end is a bit sketchy because we and E3D are making some design changes.
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Nice blog post David! (I like the Escher lizards in the photos as well :P)
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Hi, really cool development here. I'm just wondering, can the circuit board go at the heat break, so that the hot end and the cold end are on either sides of the circuit board? This would bring the nozzle closer to the effector plane and also help prevent the cold end cooling fan from cooling the hot end.
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I looked at that, but there isn't enough room between the heatsink and the heater block to fit he PCB in without the heater block being very close to the PCB. However the next version will put the hot end about 10mm higher because there won't need to be a collar below the heatsink.
