bom.md

Laser Cut Parts

Most of the custom parts for the Drawbot are designed to be laser-cut from 1/8 inch acrylic. The plastic will run about $20-$30, excluing cutting.

Purchase Parts

Part	Quantity	Price Each	Source
Arduino UNO	1	$29.95	http://www.adafruit.com/products/50
Adafruit Motor Shield	1	$19.50	http://www.adafruit.com/products/81
NEMA 17 Motor	2	$14.00	http://www.adafruit.com/products/324
End Stop Switch	2	$1.95	http://www.adafruit.com/products/819
Micro Servo	1	$5.95	http://www.adafruit.com/products/169
Servo Extension Cables	2	$2.50	http://www.adafruit.com/products/973
608 Skate Bearings 8-Pack	1	$7.75	http://www.amazon.com/dp/B001U7MQPO
M3 Screws 20mm	1	$4.00	<mcmaster.com> 92095A185
M3 Screws 12mm	1	$5.13	<mcmaster.com> 92095A183
M3 Screws 6mm	1	$5.06	<mcmaster.com> 92095A179
M3 Nuts	1	$1.39	<mcmaster.com> 90591A121
Open Beam 6-Pack	3+	$64.99	http://www.amazon.com/dp/B00C444G6O
Timing Cable*	7+	$2.00	http://openbuildspartstore.com/
Timing Pulley (5MM Shaft)	1	$4.50	http://openbuildspartstore.com/

3D Printing

If you have access to a 3D printer, you might want to 3D print the pen holder, or you can mount a pen to the servo in another way. We used rubberbands and tape before we printed the pen mount.

We also printed our own timing pulley, instead of ordering it.