Kit

Difference between AR3 and AR2 is that each motor in AR3 have rear shaft and mounting holes for encoder. Here is the youtube video show how to build a AR3 robot by yourself  OPEN SOURCE LOW COST ROBOTS If you expect to ..

Package includes: 2 x Nema 17 Bipolar 0.9deg 46Ncm (65.1oz.in) 2A 2.8V 42x42x48mm 4 Wires 17HM19-2004S1 2 x Nema 17 Bipolar 59Ncm (84oz.in) 2A 42x48mm 4 Wires w/ 1m Cable & Connector 17HS19-2004S2 1 x Nema 17 Bipolar 45..

Package includes: 1 x Nema 17 Bipolar 1.8deg 16Ncm (22.6oz.in) 1A 3.7V 42x42x20mm 4 Wires 17HS08-1004S 6 x Nema 17 Bipolar 59Ncm (84oz.in) 2A 42x48mm 4 Wires w/ 1m Cable & Connector 17HS19-2004S1 ..

This kit only has motors in AR3 as the below.  Package includes: 1 x Nema 17 Dual Shaft Stepper Motor L=39mm Gear Ratio 10:1 High Precision Planetary Gearbox 9.5mm Rear Shaft Length 17HS15-1684D-HG10-AR3 1 x Nema 23 Dual..