help needed

[bant]

G day guys

I'll give this a forum thing a crack.

I have a MASSO G2 and almost finished the enclosure wiring I have a 2500 RPM 3.8 Kw AC servo belt driven to my own spindle.

Its a KRS Chinese jobbie with lots of functions parameters etc etc has braking resistor and coast down to stop at index [ I believe]

I would like to run this thing under as much control as possible ie CW and CCW and also stop at encoder "Z" pulse home for rigid tapping/thread milling and to help with clocking the tool holder/tool to spindle concentricity.

Also i think it has encoder freq/pulse divider parameter to output lower freq so I can use it on MASSO encoder feedback as it has 2500 PPR and also manual says [2500p/r,15 line increment model, differential output]???

I believe 2500 in quadrature X 2500 RPM's is way to much for the logic's so i'm hoping the freq divider can be used in speed mode? open to suggestions please????

I think it has logic input and collector inputs and what looks like 24v dc power to the input/control DB 25 plug, [I'll try and send the manual]

I did find a MASSO support response to a member regarding a very similar servo drive manual saying wiring up in Step/Dir + and - under 10v analogue control will do the trick but I'm not sure if it was for

Axis control or Constant/Variable spindle speed control, gets very confusing and nervy!!!

The control mode on the manual says "IBGT and PWM" does this mean I can utilize MASSO's PWM control to full advantage ?? Like TTL in the spindle control output terminal ??

Wondering whats the best way to wire/run it. If i need to make a relay flip flop and or freq divider Im up for it.

I have already pre wired the DB 25 plug for control [CN2 interface on the drive] with shielded twisted pairs but come to grinding halt with hook up!!!!!

So far I THINK....

MASSO pin 1 0-10v to pin 25 VREF at servo

MASSO -ve to pin 13 AGND st servo

Pin 1 and 13 on the servo seems to be logic GND as the DB 25 metal plug surround is at chassis GND/ earth.

PA+ PA PB+ PB PZ+ PZ which ones are used? or do I have to switch them for CW CCW???
OZ GND Do I need to power this to give encoder Z a better signal??

Could I use the CN1 port in RS 485 to do the control??

If anyone out there in MASSO land has had these issues love to hear from you's. Thanks to ARIE and STEVE FRISBY for your help/offers of help.

I'm not real good with this stuff so if any one can help It would be much appreciated.

Your's sincerly / frustrated

Bruno.

MACLEOD VICTORIA

 

[breezy]

@bant

Bruno,

A link to the manual will help us to understand what you are talking about.

It seems that it will take a PWM signal, then you only have to connect to pins 2&3 on the MASSO spindle connector, but to what terminals on the servo ?????

VREF is usually an voltage reference source, connecting that to pin 1 on MASSO will blow up the spindle circuitry for you.

Regards,

Arie.

 

[bant]

Hi Arie, thank you for the quick response. The manual should be the last bullet on the message under the photos.


So glad I asked the questions, I will stick the manual PDF onto this message and hope it works.

So if PWM control works, can I assume rigid tapping ie Z axis and thread pitch synchronizing may work?

BTW if it works im assuming the pulse width gives the motor speed?

Also im concerned about the encoder freq between MASSO and drive and visa versa may be incompatible

Maybe the freq divider Pn 016 on pg 56 - 57 could be utilized ?


Many thanks

Bruno

brunoa@bigpond.net.au in case the manual is to big.