Drive Configuration

[arun4444]

I am a total noob at cnc, i am trying to configure emc2 with a compumotor zeta.

I have the following specs for zeta

STEP INPUT

For every step pulse it receives on its step input, the drive will commutate
the motor to increment rotor position. To send a step pulse to the drive,
apply a positive voltage to STEP+ with respect to STEP–. The drive registers
the pulse on the rising edge.
The input is optically isolated. It may also be differentially driven.
Step input specifications are:


Input Current: 6.5 mA minimum
15 mA maximum
Input Voltage: 3.5V minimum (min. required for on or high signal)
5.2V maximum*
Step Pulse: 200 nanosecond minimum pulse width
200 nanosecond minimum off time
2 MHz maximum pulse rate
Optically Isolated: Yes 


CLOCKWISE AND COUNTERCLOCKWISE (CW & CCW)

You can convert the ZETA drive’s step and direction inputs into clockwise
and counterclockwise inputs, for use with a CW/CCW indexer. To do so,
set DIP Switch 1 – #12 to the ON position. The following changes result:
Pin # SW1–#12 OFF SW1–#12 ON
1 Step+ Clockwise+ (CW+)
14 Step– Clockwise– (CW–)
2 Direction+ Counterclockwise+ (CCW+)
15 Direction– Counterclockwise– (CCW–)
Input specifications are the same as those listed above under Step Input
and Direction Input. Each positive voltage pulse applied to CW+ with respect
to CW– causes the drive to commutate the motor and increment
rotor position in the clockwise direction. Each positive voltage pulse
applied to CCW+ with respect to CCW– causes the drive to commutate the
motor and increment rotor position in the negative direction.

SHUTDOWN INPUT (SD+ & SD-)

You can use the shutdown input to shutdown, or disable, the ZETA drive.
To activate shutdown, apply a positive voltage to SD+ with respect to SD–
when the motor is not moving. During shutdown, the drive turns off
current to the motor. The current stays off as long as the voltage is maintained
on the shutdown input.
When you remove the voltage on the input, shutdown ends. The drive
restores current to the motor, in the same phase relationship that existed
before shutdown was invoked.
The shutdown input may also be differentially driven. Specifications are:
➁ Installation 19
Input Current: 2.5 mA minimum
30 mA maximum
Input Voltage: 3.5V minimum (min. required for on or high signal)
13V maximum
5V maximum reverse voltage
Active Level: While voltage is applied, current to motor is shut down.
When voltage is removed, normal operations resume.
Time: 250 nanosecond minimum width
Optically Isolated: Yes
FAULT OUTPUT (FLT C & FLT E)
The ZETA drive can signal, through its fault output, that it has detected a
fault. Internally, the terminals FLT C and FLT E connect to the open
collector and open emitter, respectively, of an optically isolated transistor.
The transistor acts like a switch: it conducts when the drive is functioning
normally; it does not conduct when any of the following conditions exist.
❏ No power is applied to the drive
❏ AC line voltage is too low (less than 95VAC)
❏ Drive temperature is higher than 55°C (131°F)
❏ Drive detects a short circuit in motor or motor cable
❏ Motor is not connected
❏ Continuity between interlock terminals is broken
❏ Shutdown input is active
Fault output specifications are:
VCE: 30VDC
VCESAT: 1 VDC
Collector Current: 40 mA minimum
Dissipation: 40 mW maximum
Optically Isolated: Yes

RESET INPUT

The reset input provides a means for you to reset the ZETA drive, without
actually cycling power. To activate the reset input, apply a positive voltage
to RESET+ with respect to RESET– when the motor is not moving. The reset
will not be complete until 0.7 seconds after the voltage is removed. A reset
has the same effect on the drive as cycling power:
❏ DIP switch settings are loaded into the drive for configuration.
❏ Existing faults are cleared.
❏ Current to the motor is turned off while voltage is applied to the reset input.
❏ After voltage is removed from the reset input, the drive’s soft start procedure
will ramp current up to the startup state. The motor will move to the nearest
pole position.
❏ After voltage is removed from the reset input, there will be a 0.7 second
delay before reset is complete, and normal operations can continue.
Reset input specifications are:
Input Current: 2.5 mA minimum
30 mA maximum
Input Voltage: 3.5V minimum (min. required for on or high signal)
13V maximum
5V maximum reverse voltage
Reset Voltage Pulse: 250 nanosecond minimum pulse width
Active Level: While voltage is applied, reset occurs.
When voltage is removed, normal operations resume.
Reset Delay: 0.7 second delay until reset is complete, after voltage is
removed from input.
Optically Isolated: Yes

From this i gather for EMC2:-

Axis Drive Type = Stepper
Step Time ns = 300
Step Space ns = 300
Direction Hold ns = 300
Direction Setup ns = 300

Is this correct

Thank you very much

Best,

arun

[Big John T]

I'm no expert but it looks like it should work if you have the jumper set for step/direction...

John

[arun4444]

Thank you very much john, i will try it out