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Messages - spegelius

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46
Cube 3D printer discussion / Re: FrankenCube v0.1 Its ALIVE!!!
« on: February 20, 2016, 04:52:25 am »
After further testing, stepper current doesn't have much effect after the 0.3V mark. It does smooth to worst 'jaggedness' a bit, but doesn't fix the problem. I wonder if the Y axis of my printer just is fitted with not-so-good stepper, or if the whole plate attachment system resonates too much, causing the loud noise.

I've been thinking about printing dampeners for the steppers with Filaflex, but i need to plan that as it affects the stepper attachment to frame.

47
Cube 3D printer discussion / Re: FrankenCube v0.1 Its ALIVE!!!
« on: February 11, 2016, 02:21:42 pm »
Stepper current definitely effects how low loud or 'fluid' it's operation is. I tested this today by altering Vref (which affects the current). I actually had to raise to voltage, which in turn raises the current (if i've understood the chip datasheet correctly).

On my printer, only really loud axis seems to be the Y (the arm where the bed is attached to). I was actually wondering if there's something loose on the arm, especially during the fast moves. After rising the Vref from 0.3V to 0.35V the situation improved considerably, the machine doesn't sound like it's breaking apart :). I've only done this to the Y axis stepper driver, but it might be that that's the only one i need to alter as other steppers don't sound bad.

48
Cube 3D printer discussion / Re: FrankenCube v0.1 Its ALIVE!!!
« on: February 09, 2016, 12:25:09 pm »
Yes, on the right of the box you drew, behind the green PCB (on the pic), is a nut that you must open to remove the part where the gear (or it might be a wheel, i'm not native english speaking person ;) ) is attached to. After you remove it, on the back there's the axle protrusion that needs to be filed.

49
Cube 3D printer discussion / Re: FrankenCube v0.1 Its ALIVE!!!
« on: February 09, 2016, 11:50:28 am »
I'll see if i can get a picture later when the printer is not printing. I need to remove the gear to a picture.

50
Cube 3D printer discussion / Re: FrankenCube v0.1 Its ALIVE!!!
« on: February 09, 2016, 11:33:49 am »
I've been printing with bulk filament for a week now. I did need to adjust the gears, because the slightly bigger bulk filament was squished too much be the default gear setting and didn't fit the nozzle. I've had only one failed print out of 20 or so, the filament jammed in the middle of the print. I think that it was caused by me testing some extrusion settings in Kisslicer, because since then no problems.

I've tried two brands of filament, Cel Robox white PLA and Esun black PLA. I also have a roll of black Filaflex, but haven't tested it yet.

Adjusting the gear: on my printer, it was impossible to adjust the gear because the way it's machined. The backside of the gear has the gear's axle protruding and this protrusion then fits a hole in the frame and thus cannot move backwards from it's original position. I needed to file away a bit from the axle so now the gear can be moved backwards more.

51
Cube 3D printer discussion / Re: FrankenCube v0.1 Its ALIVE!!!
« on: January 24, 2016, 10:01:58 am »
Last week i stumbled on this forum and started reading about hacks for Cube 2, which i own. So now i'm printing stuff sliced with Kisslicer, bough my first non-Cube filament (not tried yet) and opened my Cube up to fit two cartridge chips behind a switch (jumpers), so i really don't need Cube cartridges anymore. Thanks for the these, my printer just seems so much better now  :).

I stripped all plastic covers off my Cube and i might leave it naked, as it seems that those covers were amplifying to noise. I don't mind about the aesthetics, only the functionality :)

I noticed a mention about lowering the power fed to the steppers using ports on mainboard, to make the printer more quiet. However, i don't have any potentiometers on the mb of my Cube. I did some measurements and one line to stepper was reading about 2.0V, so apparently there's room to lower (if that was the proper voltage anyways...), but just need to figure out how. There are 4 a3979slpt stepper drivers which i believe to be responsible of the current fed to the steppers. Looking at the datasheet, there are two Sense pins which probably control this, so changing those resistors might do the trick. Need to do some measurements. Also, if someone has pots on their Cube motherboard and can send me a picture of the, that might be help.

Also there was a mention about using a Zener diode to block the writes to the cartridge chip. If i'll find a Zener diode, i'll see what it does now that the machine is taken apart.

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