using masso spindle outputs to drive a closed loop stepper

[madscientist]

Hi All,

I want to wire the spindle outputs on the mass to drive a closed loop stepper on my lathe spindle. my aim is to have a C axis. the drivers are from steppers online and are CL86T digital drivers, driving a Nema 34 8.5NM closed loop stepper. any advice would be appreciated.



Thanks

 

[breezy]

Nathan,

I can't guarantee it but if the driver can accept 0-10v signal for speed and be switched forward and reverse by TTL CW/CCW signals it could work.

Regards,

Arie.

 

[madscientist]

Champion. To my rescue again. I'll go through the manual and post any info or methods here.



Thanks

 

[madscientist]

if I'm reading correctly I think it may be possible,

Control Signal Connector Screw Terminal
Pin	Name	I/O	Description
1	PUL+	I	Pulse Signal: In single pulse (pulse/direction) mode, this input represents pulse signal, each rising or falling edge active (software configurable, see Closed-loop Stepper Driver software manual for more detail); In double pulse mode (software configurable), this input represents clockwise (CW) pulse, active both at high level and low level. 4.5-24V when PUL-HIGH, 0-0.5V when PUL-LOW. For reliable response, pulse width should be longer than 2.5?s.
2	PUL-	I
3	DIR+	I	Direction Signal: In single-pulse mode, this signal has low/high voltage levels, representing two directions of motor rotation. In double-pulse mode (software configurable), this signal is counter-clock (CCW) pulse, active both at high level and low level. For reliable motion response, DIR signal should be ahead of PUL signal by 5?s at least. 4.5-24V when DIR-HIGH, 0-0.5V when DIR-LOW. Please note that rotation direction is also related to motor-driver- encoder wiring match. Exchanging both the connection of two wires for a coil and an encoder channel to the driver he connection will reverse motion direction. Or you can toggle the SW5 to reverse the motion direction.
4	DIR-	I
5	ENA+	I	Enable Signal: This signal is used for enabling/disabling the driver. In default, high level (NPN control signal) for enabling the driver and low level for disabling the driver. Usually left UNCONNECTED (ENABLED). Please note that PNP and Differential control signals are on the contrary, namely Low level for enabling. The active level of ENA signal is software configurable.
6	ENA-	I

Status Signal Connector Screw Terminal
Pin	Name	I/O	Description
1	Pend+	O	In-position Signal: OC output signal, active when the difference between the actual position and the command position is zero. This port can sink or source 20mA current at 24V. The resistance between Pend+ and Pend- is active at high impedance.
2	Pend-	O
3	ALM+	O	Alarm Signal: OC output signal, active when one of the following protection is activated: over-voltage, over current and position following error. This port can sink or source 20mA current at 24V. In default, the resistance between ALM+ and ALM- is low impedance in normal operation and become high when CL86T goes into error. The active level of alarm signal is software configurable. See Hybrid servo software operational manual for more detail.
4	ALM-	O

 

[madscientist]

Encoder Feedback Connector Screw Terminal
Pin	Name	I/O	Description
1	EB+	I	Encoder channel B+ input
2	EB-	I	Encoder channel B- input
3	EA+	I	Encoder channel A+ input
4	EA-	I	Encoder channel A- input
5	VCC	O	+5V @ 100 mA max.
6	EGND	GND	Signal ground

Power and Motor Connector Screw Terminal
Pin	Name	I/O	Description
1	A+	O	Motor Phase A+
2	A-	O	Motor Phase A-
3	B+	O	Motor Phase B+
4	B-	O	Motor Phase B-
5	+Vdc	I	Power Supply Input (Positive) 30-72VDC recommended, leaving rooms for voltage fluctuation and back-EMF.
6	GND	GND	Power Ground (Negative)

 

[breezy]

Nathan,

Hate to say it but that won't work!!!!

Those drivers are pure S&D.

Regards,

Arie.

 

[cncnutz]

Hi madscientist

Please be aware that Masso lathe does not support C axis at this time. The link below may help.
https://www.masso.com.au/forums/topic/c-axis-lathe/

Cheers
Peter

 

[madscientist]

Quote from Breezy on August 8, 2020, 4:05 pm

Nathan,

Hate to say it but that won't work!!!!

Those drivers are pure S&D.

Regards,

Arie.

haters gonna hate haha, I was hopeful. with the digital drivers I have, the software they come installed with is configurable to an extent. ill just bite the bullet and order a brushless with a VFD. ill play around with a few ideas and see if I have any success. I also added my name to the list of people wanting a true C axis for the lathe software.

thanks again guys.