GET3D free give away free extruder.
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Since it was a freebee, I don't think the strict thinking you are applying is entirely fair. I still think that other than the fan mounting plate, it is a very nice looking unit be it production or prototype. My only concern would be being locked into one supplier for spares which tends to get expensive quickly.
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@jens55 said in GET3D free give away free extruder.:
Since it was a freebee, I don't think the strict thinking you are applying is entirely fair. I still think that other than the fan mounting plate, it is a very nice looking unit be it production or prototype. My only concern would be being locked into one supplier for spares which tends to get expensive quickly.
You may be right but if I was trying to gain customers the first units I shipped for free would be the best I could produce.
The issue about suppliers is a important one. I recently decided to try a Mosquito based on some research. It was pricey to be sure and who knows about the viability of the supplier. But it certainly is a first rate design and I am very pleased.
Frederick
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This is not a new design, it's a micron which have been around for a few years.
I have one at work but with a more powerful hotend. The machining work is excellent and it performs well overall. I do prefer a dual drive like bondtech so I don't use it much.
My only complaints are that wire management was obviously an afterthought and that the motor gets excessively hot during use unless I derate the amps quite a bit.
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@nhof said in GET3D free give away free extruder.:
This is not a new design, it's a micron which have been around for a few years.
So the one being offered for free is a copy of another companies work?
Frederick
Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6
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@jay_s_uk said in GET3D free give away free extruder.:
Today I received a parcel in the post containing a Get3D extruder.
I've had a quick look over it but I don't want to pass judgement on it too soon.
In the meantime, I wanted to share some more detailed photos. I was sent the high temperature direct version, which is fitted with a 100w 24v heater cartridge and a 'K' type thermocouple.
Hot damn! It is a sexy looking gadget. Let us know how it works?! As for power, we got lots power! Braided wires, built-in extruder, hi-temp hot-end...and small too..and some mass...
It is sexy.
3mm
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@fcwilt More likely they're just distributing it under a different name. The original is made in Israel.
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Hi everyone,
I have new 13:1 gear motor for 65.00 each They are great for z belt drive.
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@Get3D Planetary gearboxes are usually not whole number ratios. What's the actual ratio?
What sort of full steps/mm will you end up with in a Z axis application?
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Seems to me that 13:1 is way too high a ratio to be useful for anything 3D printer related <shrug>
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@jens55 In the Z axis it's fine. I have 30:1 in the belt lifted Z axis of my printer, using a worm gear so the bed won't drop when the Z motor loses power.
13:1 may or may not be a high enough ratio to prevent bed drop. It will depend on the weight of the bed, friction, and the motor detent torque.
Planetary gear boxes don't usually have whole number ratios. That means that you probably won't be able to get nice, round whole-step movement values from the Z axis. You'll end up with a weird value like 158 um/whole step. It doesn't really matter - it will print fine, but the weird number can make it a little troublesome to calculate the number of layers in a given thickness of plastic. It's just a number, but that sort of stuff bothers me.
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I run 50:1 on my extruder, and for a short while I was considering going up to 100:1.
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I don't get it ... my z runs at 1:1 and 400 steps (nominal) per mm. Even that exceeds the limits of the mechanics. So you don't like microstepping so I can see a 4:1 reduction gear which is fine for printing but likely limits your travel speed for moving the gantry up and down. I can see no reason to go to a higher gear ratio.
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@jens55 said in GET3D free give away free extruder.:
I can see no reason to go to a higher gear ratio.
@mrehorstdmd said in GET3D free give away free extruder.:
so the bed won't drop when the Z motor loses power.
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@Phaedrux , a 4:1 gear reduction would probably do the same thing for you but you could always introduce a small amount of friction, either constantly (easily overcome by the stepper motor) or when power to the z motors is shut off.
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Constant reaistance to movement due to detent torque and gearing down is far easier to conrrol than constant friction. I've done belt z with no gear reduction and 4:1 and both drop with no power. Belt and worm is the next major mod for my P3Steels following on from 1mm pitch trapezoidal screw.
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They are 5:1 same as the ones on the lulzbot. I only have very low stock right now but I can get more very soon.
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@Get3D said in GET3D free give away free extruder.:
They are 5:1 same as the ones on the lulzbot.
(5+2/11):1 According to your data sheet.
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@DocTrucker said in GET3D free give away free extruder.:
(5+2/11):1 According to your data sheet.
This is a funny number, equivalent to a 57:1 gear followed by 1:11 gear. I wonder if those two numbers are intuitively visible when looking at that gear's internals.
As for bed dropping, my 310x310x6mm bed holds well with these anti backlash nuts https://www.aliexpress.com/item/32838135064.html (two 8mm lead screws, 4 starts, 8mm lead).
Edit: Not applicable for belt drives though.
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@zapta said in GET3D free give away free extruder.:
two 8mm lead screws, 4 starts, 8mm lead
The high gear ratio motor is mainly being discussed in relation to a belted bed, no lead screw.
