Rebuilding Industrial 3D Printer

... I've modified several industrial CNC-machines with different RepRap-controllers (Gen3, Gen5, RR-Fw, Marlin) with different stepper drivers too - from Gen3-drivers to industrial drivers with 325VDC motor voltage.

Actually I'm using RADDS with Marlin4Due firmware and RAPS128 stepper drivers, which can drive up to 2.2A continuous and with up to 1/128 microstepping ...

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Viktor
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Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]

we already have the ramps from the reprap printer to try things out (we tryed pronterface the first day but it wasn't working, the debug program worked thought, with all the stepper motor working except 1 that was plugged on a driver that lost it's radiator)
i don't know yet if we would have to reuse that ramps card or get another, but at least now thanks to you we know that 2A is enough ^^

about the extruder, i think it would be better (considering that this project have to be mostly mechanical) to go with a stepper motor to adapt to the head and a mechanism to pull the filament into the hotend

so i guess for now what we have to buy is :
-ramps card with 2A drivers (if we don't use the actual one)
-reprap hotend (if we don't use the actual one)
-reprap heatbed (the one we have is pretty narrow, it would be nice to take advantage of the full printer range, maybe a 300x300 one, i don't know how much the margins should be)
-stepper motor able to pull filament (i'm thinking about laying the spool on top of the printer frame and make the filament go through the center of the spool to the motor, so it wouldn't ask too much torque)

and the filament pulling mechanism + stepper motor and hotend attachement
we could use the repar system or copy it, but it might give us extra precision to go with bent metal insted of plastic

PS : could we power the LED stripes from the arduino? (i mean will there be a free connector on the ramps to plug them to ^^)
PS2 : we have acces to the printers only on thursday of school weeks

Edited 1 time(s). Last edit at 09/25/2015 04:03AM by Nagby.

for now there are some things we are wondering that you could help us with :

- how are plugged the 4 wires to the front interruptor?
- what file from the reprap USB key we have to modify? (to make motors, min/max sensor and temp sensor work)
- is it possible to power the arduino using the 5/12v PSU of the printer and microSD or RJ45 to transfer gcode? (so no PC is required)
- where did you put the spool? ^^
- what is the surface you print on? (heatbed + glass over it and glue to print in ABS or is there more simple solutions?)

Edited 2 time(s). Last edit at 09/27/2015 05:33AM by Nagby.

is this topic still active?

Quote
VDX
... I've modified several industrial CNC-machines with different RepRap-controllers (Gen3, Gen5, RR-Fw, Marlin) with different stepper drivers too - from Gen3-drivers to industrial drivers with 325VDC motor voltage.

Actually I'm using RADDS with Marlin4Due firmware and RAPS128 stepper drivers, which can drive up to 2.2A continuous and with up to 1/128 microstepping ...

I am skeptical about a RAPS128 being capable of running at 2.2A. Has anyone tested it at high currents? I can't even find a proper datasheet for the chip, only a "development proposal", which suggests that its total Rds(on) will be 0.55 ohms typical - just a little less than the 0.66 ohms typical of the A4982. If like other stepper driver chips it is designed to be cooled through the PCB, then on the RAPS128 it will suffer from being on far too small a PCB - just like all the other plug-in drivers - and the achievable current will be much less than 2.2A. The 128x microstepping is a nice feature, but in the absence of more data, I would caution anyone expecting it to carry much more current than an A4982 or DRV8825 driver.

Edited 1 time(s). Last edit at 10/10/2015 10:28AM by dc42.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

... here is the actual documentation - [www.dr-henschke.de]

I'm using them in different machines with currents from 1A to 1.8A without extra cooller - they gets pretty hot, but no temp stalls.

They can run with up to 3A for short time, so the 2.2A sounds feasible ... but for more drawn current I'm planning to connect the coolers to an even bigger thermal mass and to the outer housing ...

Edited 1 time(s). Last edit at 10/10/2015 02:01PM by VDX.

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Viktor
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Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]