Imported from GitHub: jaredschiltz/Pen-Plotter-Arduino-Shield · commit 3a92d67 · license CC0-1.0

Description

Uno R3 Pen Plotter Arduino Shield

README

Pen-Plotter-Arduino-Shield

This is a Pen Plotter Arduino Shield to be used with an Uno R3 Arduino. Rev A

This shield is designed to work with an Arduino that has been loaded with GRBL 0.9. All electrical pin definitions are the default pin assignments specified in the 0.9 version of the code. N.B, servo PWM control uses PIN D11 (the Z-Limit signal). Pen-up command is M03 S255 and Pen-down command is M03 S0. With the current firmware, the angle delta between S255 and S0, is 90 degrees. A couple notes about this shield:

• This shield is a modification of the original CNC shield. There is no Z-axis motor control. An AGFRC A20CLS servo is being used to move the pen up and down. This high torque (7.5 kg-cm) servo runs on a voltage between 4.8 Volts and 8.4 Volts. To generate a 5.0 servo voltage, from the 12 V stepper motor power supply, a LM2596 buck switching regulator is used. The maximum 3 A output is enough to adequately drive the A20CLS motor. I was unable to find a maximum stall current specification for this particular servo, but the assumption is that it is a least an amp.
• The Y-axis is driven by two mirrored stepper motors, so this shield ties these control signals together on the board, rather than using a jumper. This saves some board space.
• Change glass fuse to PPTC resettable fuse. Fuse specs: 16 V, 8 A hold, 13.6 A trip
• Remove 10K pullup on enable signal. Each driver board has a built-in 20K pullup.
• Make limit switch connections 3 conductors, instead of 2 conductors. The OpenBuilds limit switches are a three wire interface.
• Remove jumper connections to EN, STEPS, DIRS. It is not necessary to expose these. Remove jumper connections to SPNEN, SPNDIR, COOLEN (these are unused by the pen plotter). Remove header to UART signals, SPI, and power connections. All of these removals will free up board space.
• Make mounting screw hole locations accessible.

The following changes should be made to Rev A:

• No changes need to be implemented to date

Parts list:

Designator	Designation	MFG	MFG Part No.	Supplier	Supplier Part No.	Quantity
J3	Vertical Connector Header, 2-Pos, 2.54 mm, 6 mm contact length	Wurth Elektronik	61300211121	Digikey	732-5315-ND	1
J4/J23,J22/J19,J20/J21	Vertical Connector Header, 2-Pos, 2.54 mm, 6 mm contact length	Wurth Elektronik	61300421121	Digikey	732-5294-ND	3
D1	1N5824 5 A Schottky Diode	Vishay	SB520-E3/54	Digikey	SB520-E3/54GICT-ND	1
C2,C1,C3	100uF 50 V	Panasonic	EEU-FM1H101B	Digikey	P19712CT-ND	3
J6,J2,J1,J10,J7,J9	8 Position Header Connector 0.100" (2.54mm) Through Hole	Sullins Connector Solutions	PPTC081LFBN-RC	Digikey	S7006-ND	6
J5,J8,J11	Vertical Connector Header, 4-Pos, 2.54 mm, 6 mm contact length	Wurth Elektronik	61300411121	Digikey	732-5317-ND	3
U1	IC REG BUCK LM2596 5V 3A TO263-5	UMW	LM2596S-5.0	Digikey	4518-LM2596S-5.0CT-ND	1
C5,C4	330 uF, 50V, Low-ESR 58 m-ohm	Kemet	ESW337M050AH4EA	Digikey	399-6661-1-ND	2
L1	33 uH, 3.6 A, 51 m-Ohm	Abracon LLC	AIUR-06-330K	Digikey	AIUR-06-330K-ND	1
J13	2 Position Wire to Board Terminal Block Horizontal with Board 0.197" (5.00mm) Through Hole	Wurth Elektronik	691137710002	Digikey	732-10955-ND	1
J14,J15,J16,J12,J17	Vertical Connector Header, 3-Pos, 2.54 mm, 6 mm contact length	Wurth Elektronik	61300311121	Digikey	732-5316-ND	5
J18	Vertical Connector Header, (2 Rows / 6-Pos), 2.54 mm, 6 mm contact length	Wurth Elektronik	61300621121	Digikey	732-5295-ND	1
U3	Vertical Connector Header, 6-Pos, 2.54 mm, 6 mm contact length	Wurth Elektronik	61300611121	Digikey	732-5319-ND	1
U2, U7	Vertical Connector Header, 8-Pos, 2.54 mm, 6 mm contact length	Wurth Elektronik	61300811121	Digikey	732-5321-ND	1
U6	Vertical Connector Header, 10-Pos, 2.54 mm, 6 mm contact length	Wurth Elektronik	61301011121	Digikey	732-2670-ND
F1	PPTC Radial Resettable Fuse (8.0 A Hold Current, 13.5 A Trip Current, 16 V Max)	RFE/Fuzetec	FRG800-16F	Digikey	3451-FRG800-16F-ND	1
S1	MOMENTARY-SWITCH-SPST-PTH-6.0MM	CUI Devices	TS02-66-60-BK-160-LCR-D	Digikey	2223-TS02-66-60-BK-160-LCR-D-ND	1
H3	M3 Mounting Hole					1