User:Mcmaster/xy-ray

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2017-12-30

  • Same issue as below
    • Initial issue using a different power supply caused brownout, not sure what was happening
    • Switched to other supply and used USB cable
  • Couldn't find aluminum platform using before. Taped sensor to 1.5" t-slot instead
  • Issue getting USB ethernet working. Used regular ethernet

2017-03-02

  • Symptom: can only move in one direction
  • Cause: 5V ref can only be supplied via wall supply, not USB
  • Fix: plug in 5V supply


Wiring summary

X axis breakout

P1 Signal I/O To To
1 I
2 I
3 I
4 I
5 I
6 I
7 I
8 I
9 I
10 I
11 I
12 I
13 I
14 I
15 I
16 I
17 I
18 I
19 I
20 I
21 X opto I XY P2.1 BBB P9.5-6

5V

Red
22 X step I XY P2.2 BBB P8.13

Blue
23 X dir I XY P2.3 BBB P8.12

White
24 X enable I XY P2.4 N/C
25 X ground I XY P2.5 Ground
26 X V+ I XY P2.6 V+
27 X ground I XY P2.7 N/C (for now)
28 X V+ I XY P2.8 N/C (for now)
29 X ground I XY P2.9 N/C (for now)
30 X V+ I XY P2.10 N/C (for now)

XY P2

    • Pin 1 (XY P1.21) is upper left when looking into connector with key up
    • Keeps P2 and P1 number sequential
    • Matches 1 to square key via on adapter PCB

Motor to IDC adapter board

This is used on the Z and X axis. Taken from Z axis assuming X is the same

Front:

ASSY 0400-0200 REV.B

MOTOR INTERFACE

CABLE IN

GUAVA TECHNOLOGY INC. (C) 2002

+24 VDC, GND

Back:

1460139

+24 VDC, GND, MOTOR

VSE

VALLEY SERVICES

ELECTRONICS

www.vserve.com]]

P2 Motor PCB label Function
1 1 Opto Optoisolated output mode
N/C 2 N/C
2 3 Step
3 4 Dir
4 5 Enable
5
6 V-		 GND Ground
6 7 V+ +24 VDC V+
7 6 V- GND
8 7 V+ +24 VDC V+
9 6 V- GND Ground
10 7 V+ +24 VDC V+

Y axis

Color Signal I/O Breakout To
White Optocoupler reference I 8
BBB P9.5-6

5V

Red
Orange Step I 6
BBB P8.15

Blue
Blue Direction I 3
BBB P8.14

White
Brown Output bridge enable I 4 N/C
Black Ground I 1
Ground

Black
Red
Power

12-75 VDC		 I 2 24V

BBB P8:

    • Pin 1 is next to the ethernet port
    • Pin 1, 2 are ground
    • Is the one without the JTAG port next to it

<file> The signal applied to the optocoupler reference will determine the sinking/ or sourcing configuration of the inputs. To set the inputs for sinking operation, a +5 to +24 VDC supply is connected. If sourcing, the reference is connected to ground </file>

Voltage compatibility

Motor/driver:

    • Logic Threshold (Logic 0): < 0.8 VDC
    • Logic Threshold (Logic 1): > 2.2 VDC

BBB: While the GPIO pins on the BeagleBone Black run at 3.3 Volts, …

Sounds like should be able to directly hook BBB output to MDrive17+. Revisit if there are any signals that need to go vice versa

x-ray sensor

Gendex/Dexis GXS700

Source: local

x-ray head

GE 1000. Controlled with DLI WPS7 attached to several variacs for filament/voltage control

Source: eBay

Controller

Beagle Bone Black running LinuxCNC fork

Python reference]]

    • Was very easy to get stuff working

http://www.machinekit.io/]]

http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#BBW.2FBBB_.28All_Revs.29_Machinekit_2]]

Pre-built images

System Reference Manual (SRM): http://www.adafruit.com/datasheets/BBB_SRM.pdf]]

u/p: machinekit / machinekit

No-cape

http://blog.machinekit.io/p/machinekit_16.html]]

Select the example configuration that matches your hardware (I suggest starting with the CRAMPS configuration if you don't have any hardware) and launch LinuxCNC

NOTE: If you want to switch between configurations that load unique hardware overlays, you should reboot

CRAMPS board schematic]]

From reading schematic, default/intended pinout is:

Function OMAP pin BBB pin Note
X_STEP EHRPWM2B P8.13
X_DIR GPIO1_12 P8.12
X-MIN
X-MAX
Y_STEP GPIO1_15 P8.15
Y_DIR GPIO0_26 P8.14
Y-MIN
Y-MAX
Z_STEP EHRPWM2A P8.19
Z_DIR GPIO2_1 P8.18
Z-MIN
Z-MAX
ESTOP
ESTOP_SW

BeBoPr++

I'm not sure if these are available for purchase (or even if I need it), but it has example configs and documentation

Reading through the user guide

Hmm this is unfortunate:

Each BeBoPr++ comes with a license for use of the PRUSS stepper driver firmware. This stepper driver is proprietary code that runs on a PRU co-processor and is stored in the BeBoPr++'s on-board EEPROM. The driver handles deterministic and accurate timing of the stepper pulses for all four axes simultaneously. It also generates the acceleration and deceleration ramps. Via the API†, custom applications can easily generate accurate stepper

Does this mean the PRU's are usually unusable?

Probably not looks like there's also an open source version:

An open source code repository to build a 3D printer with the BeBoPr++ is available at This code uses one of the PRU coprocessors for the step pulse generation and can freely be changed.

Looks like LinuxCNC should have reasonable support out of the box

It has support for the BeBoPr since the original (first) BeBoPr and all software, including the PRU stepper code is open source. As a community effort, it evolves faster than the BeBoPr 3D printer code

XY stage

From HSC Electronics

10 TPI

Motor

M DRIVE MOTOR + DRIVER 17 PLUS MICROSTEPPING

MCM17A-GVT-40 203100065 V3.0.02

What is the MCM series? Evidently there are several variants of this

Mine

    • MCMXXX17A
    •  ??? inputs

Step/direction input version

Programmable Motion Control version

    • Datasheet]]
    • MDIXXX174
    • Step/Direction I/O for electronic gearing
    • RS-422/485

Speed Control version

Saw similar one on eBay: IMS/SCHNEIDER MDRIVE 17 Plus STEPPER MOTOR MDI1PRD17B4

    • RS-422/485 communication
    • +12 to +48 VDC input voltage
    • Up to 74.9 oz-in (52.9 N-cm) holding torque
    • Robust programmable I/O (up to 8 general purpose points) with input filtering
    • Powerful instruction set with advanced math functions using 1-2 character mnemonics
    • Step/Direction I/O for electronic gearing.
DC input voltage Range (includes back-EMF) +12 to +48 VDC
Power supply current requirement Max per MDrivePlus (depends on voltage and load) 2.0
Aux-Logic supply Voltage +12 to +24 VDC
Aux-Logic supply Current requirement (max) 194 mA
Operating Temperature Measured at heat sink (non-condensing humidity) 85°C
Operating Temperature Measured at motor (non-condensing humidity) 100°C

Active microstepping?

Cabling

Y and Z go to 15 x 2 (30 pin) IDC cable

X has its own cable going from inline to 4 x 2 IDC

Parameter cable

Parameter setup cable MD-CC300-000 or equivalent (USB to SPI)

    • MD-CC300-001
    • MD-CC302-001

Parameter cable: http://motion.schneider-electric.com/downloads/datasheets/discontinued_prod/md_cc300_000.pdf]]

Found this cheap on eBay when I was looking for above:

MD-CC4 USB to RS422 Comm Converter MD-CS300-400 REV-B 03/10

Might be useful for NEMA 23 (RS-422) but it turns out the manual had a typo…NEMA 17 is SPI, NEMA 23 is RS-422. Seems inconsistent

Original indexer

GUAVA TECHNOLOGIES, INC. GUAVA MOTION BOARD 2 FAB 0400-0580 REV A ASSY 0400-0590 REV (C) 2008

"Millipore Takes Over Guava Technologies for $22.6M"

Probably hard to find info on it

Not worth the effort to figure out how it works. Replace with beaglebone black

Fixturing

PanaVise PCB holder (already had it around)

As centered won't be able to scan whole PCB. Need to find a way to re-mount it

Use original mast

Need to drill new hole on side to use the entire scan area

Allows adjusting PCB angle

Need to mount mast to t-slot

Re-mount rail

Instead of using the mast put stand offs on both ends onto t-slot. Maybe make an aluminum adapter if I need something more solid

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