2018-01-08, 02:00 AM
Apologies if this gets longish. I have not yet built, and have many questions.
I am planning to build a Snappy V2.0.
First problem: I need a 3D printer to print the Snappy parts. Oh, I guess I should mention (for those who are not aware): The Snappy is a **true** RepRap. Literally, the entire thing is 3D printed. You need motors, electronics, a bearing, and a couple of tiny nuts and bolts, and that's it. Everything else is printed.
Anyway, I have a friend who bought/built a 3D printer kit, and is happily printing. So, I am going to approach him with all the STL files, and the filament (around 2.4KG), and see if he is willing to help out. As for the other parts, I am scavenging an aborted OneUp kit.
Second problem: My OneUp kit came with only four NEMA17s and I need five for the Snappy. I believe that the motors that came with the OneUp were Wantai 42BYGH610 from China (cannot confirm - hope we get the old fabric8r contact back soon). I would like to have all the same motors, as I think it simplifies things. However, the 42BYGH610 is hard to find. A set of three is for sale on eBay ($33 - pricey, as I only need one). aliexpress.com has the motor advertised by (I believe) the manufacturer, for $8.95, but says that it is no longer available.
Another option would be to simply use a different NEMA17 for the fifth motor. mpja.com has a motor who's specs come close:
Model: 32177 MS
Step: 1.8 degree
Lngth: 1-7/8" (47.625 mm)
Coil: ~6 Volts/??? Amps/7 Ohn/15 MilliHenrys.
Wires: 4
Polar: 2-Phase, Bipolar
Torq: ???
RI: ???
DT: ???
Wt: 0.75
Model: 42BYGH610
Step: 1.8 degree
Lngth: 40 mm
Coil: 6.5 Volts/1.2 Amps/6 Ohm/13 MilliHenrys
Wires: 4
Polar: ???
Torq: 3000 gcm (41.662159670238 ozin)
RI: 54 g(cm^2)
DT: 220 gcm (3.05522504248412 ozin)
Wt: 0.24 Kg
Abbreviations: RI=Rotor Inertia, DT=Detent Torque, Wt=Weight
So, this leads to all kinds of questions. First, how does my RAMPS board know that one motor (which I will probably use as the extruder motor) is different? Do I have to configure that in the firmware? Is there a good tutorial out there for configuring firmware for differing motors? Is it wise to even have an oddball motor in this scenario?
Also, I am planning to use the anubis print head that came with the OneUp kit. Anybody have any hints/tips for using that head?
If anyone can verify the motors, or if using one oddball will help/hurt, or can offer any advice on this endeavor, please advise.
Thank you all in advance.
I am planning to build a Snappy V2.0.
First problem: I need a 3D printer to print the Snappy parts. Oh, I guess I should mention (for those who are not aware): The Snappy is a **true** RepRap. Literally, the entire thing is 3D printed. You need motors, electronics, a bearing, and a couple of tiny nuts and bolts, and that's it. Everything else is printed.
Anyway, I have a friend who bought/built a 3D printer kit, and is happily printing. So, I am going to approach him with all the STL files, and the filament (around 2.4KG), and see if he is willing to help out. As for the other parts, I am scavenging an aborted OneUp kit.
Second problem: My OneUp kit came with only four NEMA17s and I need five for the Snappy. I believe that the motors that came with the OneUp were Wantai 42BYGH610 from China (cannot confirm - hope we get the old fabric8r contact back soon). I would like to have all the same motors, as I think it simplifies things. However, the 42BYGH610 is hard to find. A set of three is for sale on eBay ($33 - pricey, as I only need one). aliexpress.com has the motor advertised by (I believe) the manufacturer, for $8.95, but says that it is no longer available.
Another option would be to simply use a different NEMA17 for the fifth motor. mpja.com has a motor who's specs come close:
Model: 32177 MS
Step: 1.8 degree
Lngth: 1-7/8" (47.625 mm)
Coil: ~6 Volts/??? Amps/7 Ohn/15 MilliHenrys.
Wires: 4
Polar: 2-Phase, Bipolar
Torq: ???
RI: ???
DT: ???
Wt: 0.75
Model: 42BYGH610
Step: 1.8 degree
Lngth: 40 mm
Coil: 6.5 Volts/1.2 Amps/6 Ohm/13 MilliHenrys
Wires: 4
Polar: ???
Torq: 3000 gcm (41.662159670238 ozin)
RI: 54 g(cm^2)
DT: 220 gcm (3.05522504248412 ozin)
Wt: 0.24 Kg
Abbreviations: RI=Rotor Inertia, DT=Detent Torque, Wt=Weight
So, this leads to all kinds of questions. First, how does my RAMPS board know that one motor (which I will probably use as the extruder motor) is different? Do I have to configure that in the firmware? Is there a good tutorial out there for configuring firmware for differing motors? Is it wise to even have an oddball motor in this scenario?
Also, I am planning to use the anubis print head that came with the OneUp kit. Anybody have any hints/tips for using that head?
If anyone can verify the motors, or if using one oddball will help/hurt, or can offer any advice on this endeavor, please advise.
Thank you all in advance.