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Amp flow E30-150 on MassMind.org ENC1, BOB PID, Servo

3,672 views · Published 26 July 2016 · 1:02 · Indexed 14 October 2026

Channel: James Newton · 2016 · Science & Technology

Here is our new modular servo system running an Amp flow E300-150 DC motor from the standard RAMPS/Marlin 3D printer controller.

So if you want to build a really powerful CNC machine, you really need servos. Steppers just can't provide the power and speed needed. And servos are expensive... or they were. Really the parts aren't expensive...

DC motors are cheap, commonly available from scrap yards or pulled out of treadmills, cars, or whatever. Even brand new, they don't cost much: This Amp Flow Economy 1 HP (peak) motor was $79 and provides 710 oz/in at stall at up to 5600 RPM (no load).
http://www.ampflow.com/three_inch_high_performance_motors.htm

Motor drivers are cheap, from China or (soon) from us. Our driver, shown in the video, approaches a HP at 600 watts, but larger ones are commonly available for $20 to $40.

A PID controller can be made from an Arduino, or ours is $15 as a simple kit.
http://www.ecomorder.com/techref/ecomprice.asp?p=416079

The sticking point has always been the encoder. Optical encoders cost money, must be connected to an available shaft (often the shaft only sticks out on one side), and must be mounted very carefully. Magnetic encoders can be much easier to use, but typically only work up to around 1,000 RPM...

Our new Magnetic Encoder is super easy to mount, works even if it's lined up a little wonky, costs around $20, and... runs at up to 75,000 RPM!

Its available NOW at:
http://www.ecomorder.com/techref/ecomprice.asp?p=416078

Amp flow E30-150 on MassMind.org ENC1, BOB PID, Servo

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