Place to show off PCB Effector assemblies
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@Dougal1957:
If I recognized it right you cutted PTFE tube flush out with Nimble adaptor top. My adaptor is on the way to me yet. But as I saw at its model the hole for the tube is stepped: 4mm dia from the sitting plane up then 2mm dia up to the top of the adaptor. Was something changed or did I just misinterpret the model? -
No both myself and Rommie drilled it out all the way thru that way we know that the PTFE is all the way into the heatbreak properly. We also found that the hole for it was very tight and needed reaming out any way.
Whaen did you order yours if it was before today you will need 3 washers under each of the 3 legs and you will need some M2.5 x 16 or 18 long screws and I would suggest Nylock nuts or std ones with thread lock 16 long is just enough it is very tight getting the fan shroud on with nylocks as well so std nuts with 16 long screws and threadlock would probably be the best option.
HTH
Doug
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Thank you for your advices! And what retains PTFE in place, Nimble itself? What is the right size for drilling bit? Will 4mm be enough, maybe 4.1mm?
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4mm is perfect, just snug enough to hold it all in and then the nimble makes certain that it stays where it needs to be
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Thanks!
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@CaLviNx:
Just a thought but would a button headed allen bolt run through from underneath to a locknut or brass insert embedded into the nimble adaptor provide a little more clearance ?
It may well do but it is very minor and just forces the fan shroud slightly out of line. so don't think it would make that much difference to be honest a std nut rather than a nylock on that one side would solve the issue.
Doug
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@CaLviNx:
Just forces the fan shroud slightly out of line.
That's the bit that would bug the engineer in me though !!!
I know what you mean and I have just repositioned it and it is now flat but it is close rotate it just a little and it would foul std nut and threadlock is the answer to this one
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Completed setup:
Equipment:
Smart Effector
E3D V6
Zesty Nimble Extruder
Custom hotend fan shroud https://www.thingiverse.com/thing:2490021 with Sunon Maglev 30x10mm Fan
Sunon 30mm Radial fans x2 B0503AFB2-8 (DHGate/Aliexpress) https://www.dhgate.com/product/original-b0503afb2-8-5v-0-65w-sunon-30103/264158276.html#s1-0-1b;searl|3693541275 with custom brackets (see listing above). They are 5V but can be powered via the 5v rail with PWM provided by grounding to the PWM Fan GND pin of your choice. I thought I'd try diffuse air flow for a change, although you can bond ducts onto them.Wiring 2x ethernet cat 5e cables for sensors/fans, two heatproof original hotend heater cartridge cables for hotend heater (using 40w 12v so 3.33A means network cables are not really suitable using the spare 6 cores I had. Planning to get some 50w 24v heaters over from china, at 2A network cables might be able to handle it.
Notes, the hotend fan is located further out from the heatsink to prevent interference with the nozzle contact sensor.
The print fan when running completely ruins the sensor output, but then I can't see a case for probing with print fans on.Calibrating to 0.006 deviation.
Interestingly my G31 z offset is actually 0.1mm (not -0.1mm) which I tuned using babystepping. -
Looks good DjDemonD! I'm looking into using cat6 (or cat5e) cables for my printer. Do you think 6 pairs would be enough for 40W 24V?
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Well according to this guide http://www.engineeringtoolbox.com/wire-gauges-d_419.html 24 AWG cable with 7-24 cores should be able to handle 1.4 amps, but this seems a lot to me.
In that case 1 pair would give you 1.4A, 2 paris 2.8A and 3 pairs 4.2A.
So yes I suppose it would, its only during initial heat up that a prolonged period at max PWM occurs, after that its going to be less to maintain the temperature.
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I do believe cat6 is supposed to be 23awg (altho Im sure there are some 24 or even thinner cat6 cables out there). 1.4A per pair sounds a bit much tho…
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Well could you measure the resistance of the run of cable you intend to use, then use
W=I2R to calculate the expected wattage of heat generated?You're using 24v so you are only looking at 1.66 amps total. Although measure the resistance of your heater cartridge as my recent experience has shown they are rarely the capacity they are claimed to be even from e3d et al (30w heater was only 24w calculated by resistance).
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Don't have any equipment that can measure resistance that low… I found https://en.wikipedia.org/wiki/Power_over_Ethernet talking about different PoE standards. They have the current from 350mA to 960mA per pairs of pairs. So 960/2*3=1444mA for three pairs…
Sorry for the off topic, I'll stop this line of discussion an let you guys show of you new effecors
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PoE as far as I know underrates the current carrying capacity as it affects the data handling if the cable is operated near its maximum theoretical current handling, so I suppose sticking to those limits will be safe.
I though about adding a 3rd cable but the two braided heatproof heater cartridge wires are thinner and much more flexible than a 3rd cat5e cable would be.
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On a slightly different note, I didn't have much luck with the molex microfit connector, whatever orientation I was inserting the crimps into the housing there was no positive click and the expected retention of the cable. Is there some sort of knack to doing it? I don't seem to have any problems with duponts or the molex KK connectors?
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Looking good DJ! I am interested the plovers you are using, I have not tried ones that small before. Do they actually work with PWM? Other blowers I have tried don't.
I know you have moved the hotend cooling fan out by 10mm, if you get a chance could you see if setting the sensitivity slightly higher will solve that interference registering:
https://duet3d.com/wiki/Smart_effector_and_carriage_adapters_for_delta_printer#Programming_the_sensitivity -
On a slightly different note, I didn't have much luck with the molex microfit connector, whatever orientation I was inserting the crimps into the housing there was no positive click and the expected retention of the cable. Is there some sort of knack to doing it? I don't seem to have any problems with duponts or the molex KK connectors?
The two little barbs on the sides of the pin should lock in to the microfit housing. Its possible you are not inserting them far enough. Try pushing them in a little further (I sometimes use a small jeweler's screwdriver to push on the back of the pin)
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Hi Tony, the blowers work well and were Nebbian's (from reprap forum) idea. They will tolerate 12v and then they are extremely powerful but they shift a fair amount of air at 5v. I find I can PWM them from about 30% to 100%.
I tried sensitivities from 0 to 255 not much difference, as David said I think its that this fan is a much more powerful unit than the e3d standard one, and its is very close, and directly beneath the strain gauge. I suspect it won't be a problem for most. I would have tried the spacer but then I like the compact hotend below the effector for its reduction in effect of tilt and stability.
My connectors are holding together, just seemed so much less positive locking into place than other types of crimps/housings I've used. But I'll try that idea.
I have noticed my large nut holding the heatsink came loose and with the nimble adaptor in place its hard to get to. Makes me wonder if:
A nut can be sourced which has slots on the side which could be used to push it round with a flat bladed screwdriver for tightening purposes, I accept there is a risk to the PCB.
Or maybe we can design a 12 pointed star type locking ring type thing into the underside of the nimble adaptor once the nut is in a reasonable rotational position we could tighten the hot end heatsink into it. -
A few spots of thread lock should stop the nut coming loose.
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A few spots of thread lock should stop the nut coming loose.
Had the same issue, 1 drop of thread lock did the job.
