Manual for Larken Controller

Manual for Larken Controller
Manual for Larken Controller
The Larken 3 axis stepper motor controller contains, the following sections.
- 16 Gauge case with connectors, Stop button and powerswitch and fuse etc.
- Powersupply, usually 45 or 65 volts DC at 300 or 500 watts
- PC Interface for Lcam Dos controller or (and) StarCam windows controller board.
- Stepper motor driver boards (3 or 4).
SAFTEY PRECAUTIONS
- Always unplug the power cord before doing any maintenance or opening the controller.
- Always use a 3 prong grounded soldering iron.
- High power components such as capacitors and pwer transisters can explode,
always wear saftey glasses.
Copyright 2002 Larken Automation Inc.
Larken Lcam Interface board
Connection diagram
Step Pulse
+ 5 Volts
Direction
12 Volts AC
Power Input
W Stepper
Z Stepper Outputs
Y Stepper To
Stepper
X Stepper Drivers
1 Amp Fuse
DC Power Out
(for Fan etc)
X2 Stepper
FG
Parallel Port
Cable Input
Spindle 1 On
Spindle 2 On
Stop (in/out)
Aux Out 2 (O/C)
Aux Out 1 (+5V)
ATC Enable
Common (Gnd)
TC / Aux
Outputs
0-10 Volts (RPM)
Spindle 2 On
Spindle 1 On
Common (Gnd)
Spindle
Control
TTL Output (+5 V for SS Relay)
O/C Output (for inverter control)
Common (Gnd)
Stop Switch
X Limit
Y Limit
Z Limit
W Limit
X2 Limit
SQ Input
+15 Volts
Common (Gnd)
Aux Input
Stop Switch
(N/O)
An1
Main Inputs
An2
Spindle Start
Switch (N/O)
5350 Canotek Rd. Unit 13
Ottawa, Ontario, Canada, K1J-9E1
(613)-746-5970 Fax(613)-746-6451
www.LarkenCNC.com
Connecting Limit switches to the Larken Interface board
Using Micro Switches for home/overtravel switch
Common
X
X Limit
Y
Y Limit
Z
Switches should be Normally open
Z Limit
Note : The ‘Limit SW polarity’ setting should be set to 0 for Normally Open in Lcam
Using an Opto Switch for home/overtravel switch
1000 Ohm
+15 Volts
A
Limit Input
Common
Opto Interrupter
Module
Vane can be mounted
on each end of Axis
E
Digi-key PN / H21B1QT-ND
(Darlington output)
Note : NC limits are not available on the StarCNC controller at time of writing
Emergency Stop and Spindle Start Buttons
Emergency Stop
Spindle Start
Both use N/O (normally open) push button switches
5350 Canotek Rd. Unit 13
Ottawa, Ontario, Canada, K1J-9E1
(613)-746-5970 Fax(613)-746-6451
www.LarkenCNC.com
Spindle Control
Spindle Control
Connector (TTL)
Speed 0-10V
Spindle 2
Spindle 1
Common
Solid-State
Power Relay
+In
AC
120 Vac
Com
Router
Use the TTL spindle control connector to drive CD controlled relays
Use the O/C (open collector) connector to drive most AC inverter drives.
The 0-10 volt speed ouput can control the Router RPM. The speed can be set in the
Tool list within Lcam. It is output when running certain tool change modes.
Notes:
- The required power input to the Interface is 12 volt AC at 1 amp.
- There is a fan output to drive a small 12 volt DC fan for your controller
- Use a 1 amp fuse (radioshack)
- Do not connect the common ground to the frame on your machine. This
may cause high currents to flow through the interface board.
- Keep all Limit switch and control wires isolated from machine ground
- Keep motor power wires separate from interface wires (limit etc)
- On controls where electrical noise is a problem, solder a ground wire
on the interface to the FG point and connect it to the case of your
controller
5350 Canotek Rd. Unit 13
Ottawa, Ontario, Canada, K1J-9E1
(613)-746-5970 Fax(613)-746-6451
www.LarkenCNC.com
Cobra Stepper-Motor Driver Setup diagram
Power
24-80 V
Rs
Fuse
Fuse
Rs
Processor
R1
R2
Output
Setting the Current per phase
- Current is set by the value of R1 and R2.
- Both R1 and R2 should be the same.
- (Rs may be 0.1 or 0.05 ohms on your Cobra
Please choose accordingly)
Current
8 Amp
7 Amp
6 Amp
5 Amp
4 Amp
3 Amp
2 Amp
1 Amp
RS=0.1
4.0K
3.0K
2.0K
1.0K
RS=0.05
4.2K
3.6K
3.0K
2.5K
2.0K
Phase B
Phase A
Stepper
Motor
- Reversing the connections
on one phase will reverse
motor direction
5350 Canotek Rd. Unit 13
Ottawa, Ontario, Canada, K1J-9E1
(613)-746-5970 Fax(613)-746-6451
www.LarkenCNC.com
Cobra drive connections and Signals
Connecting Step/Direction Output to a Stepper motor driver board
S
+ D
Stepper Driver Board
+
Direction
Opto Couplers
+
Step
Some Stepper drivers have both + inputs
connected internally
Output drive is from a 74HC573 chip.
Step and Direction waveforms created by Lcam software.
Step signal is normally high and pulses Low then high on each step
4 uSec Min
Varies on
Steprate
Step Signal
Direction Signal
2 uSec Min
5350 Canotek Rd. Unit 13
Ottawa, Ontario, Canada, K1J-9E1
(613)-746-5970 Fax(613)-746-6451
www.LarkenCNC.com
Larken Controller Rear Connectors
W-Hm Z-Hm
Y-Hm X-Hm
Stop
B
A
+15
Volts
Aux2
Out
Aux1
Out
Spindle 1
Out
Y axis motor
B
A
Chassis
Ground
W axis motor
A
X axis motor
A
B
Pin1
Z axis motor
B
Pin3
Signal
Common Gnd
Pin 27
Female 27 pin Cinch connector looking at back of controller (from outside)
X-Hm
Stepper
Motor
Phase A
Y-Hm
Permanent
magnet
armature
Phase B
Z-Hm
W-Hm/ Probe
Spindle Relay
+
-
Relay
Aux 2 out
+
Stop
-
Relay
Signal Ground
Signal Ground
+15
Router Inverter control output
9
Inverter on
Common
Relay
+
-
Aux 1 out
5
0-10 Volt Rpm
6
1
Note: Spindle 1 out and Aux2 out
can supply 20ma (max) to external relay
- Aux1 can sink 50ma (max) from the +15V supply
View looking at front
of male 27 pin Plug
Connect to input cable shield
W axis
Sp1 Aux1 Aux2 +15
Installation and Wiring notes:
- Use Separate (18 gauge) 4 conductor cables for each stepper motor.
- Keep home/limit wires in a separate shielded cable.
- Chassis ground is connected to controller case inside of case
- Connect shields on input cables to chassis ground.
- Do not connect stepper motor wire shield to chassis ground. You may ground these shields
to machine frame if necessary
- Do not connect controller Chassis ground or any controller wire to machine frame.
- Spindle power ground wire should be connected to machine frame.
- Signal ground comes from interface board and is common to all inputs.
- Do not short any motor output wires to each other or ground or driver damage will occur
- Connect one motor axis at a time and test before continuing. If motor runs wrong
direction switch wires on one phase.
- Be sure to turn off controller for at least 30 seconds to allow main capacitor to discharge
- The spindle control on the 27 pin plug is for driving solid-state relays
- The 9 Pin D connector is for driving a Perske type router running
from an variable frequency inverter drive
- The “AC-Tech” inverter is the one we recommend
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