Compatibility of Servo and Spindle Drives for Upgrade

D

debelln

debelln
We are in the process of preparing to upgrade one of our Hercus PC300 machining centres with the Masso CNC motion controller. Currently we are selecting the products for the axes and spindle. For the axes we are planning to use brushless DC servo motors. The servo drives we are considering are,
Leadshine ACS806 Digital AC Servo Drive

ElectroCraft CPP-A06V48A Universal Servo Drive

For the spindle we are planning to use a brushless AC servo motor powered via Australian three-phase supply, and need spindle orientation control for the tool changer. The spindle drive we are considering is,

ABB MotiFlex e180 Motion Control Drive

I have attached the user manuals with I/O information of these products within this post. Would anyone be able to confirm compatibility of these products and/or express any concerns? Kind regards.
 

Attachments

  • 198-0000019_003_CPP-x06V48A-SA-USB_UM.pdf
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  • ACS806hm.pdf
    931.1 KB · Views: 30
R

radiola

Radiola
I'm interested to know why the need to upgrade the axis servos? a Gecko G320x runs these well and they are perfectly suitable for these machines.
 
D

debelln

debelln
We are a precision repetition machine shop, so ideally we are running the machines all the time on metal with flood coolant. The PC300 design poorly guards the servo motors and periodically we have to dismantle and clean the motors due to metal chips, oil, and carbon accumulation from the brushes in the motor and encoder. This is quite an insidious issue as fault messages can sporadically appear, or part dimensions will start varying randomly, or the tool can collide with the part or a fixture. There can be many possible faults which produce these effects, so inevitably there are long down times required to correctly diagnose and resolve the fault. Recently one of our machines developed such issues during a rush repetition job; this prompted us to finally commit to upgrade the machines with a modern controller and components to resolve their shortcomings. The mechanical aspects of the PC300s are more reliable than the electrical aspects, so we believe that brushless servo motors with high ingress protection ratings will best resolve these particular issues. The Gecko drive you have identified is for brushed DC motors and will not suit the motor options we have identified. Additionally, within the constraints of the Hercus controller we have already had success in upgrading the spindle motor of two of our machines to, then Baldor, now ABB, BSM series AC servo motors. We would like to continue using these motors after upgrading to the Masso controller so a compatible AC servo drive for the spindle is also essential.
 
R

radiola

Radiola
Yes, I'm aware of their poor and dated electrical shortcomings. The drives i mentioned work with the original electrocraft servos already on the machines, hence my mentioning them. Your application (a production environment) isn't typical of the Hercus end user. The motors themselves are fairly reliable I've found, however the encoders are not. The AMT10x series of encoders are capacative and quite impervious to the contaminants you mention, the ingress of which has more to do with the machine design than the motor though i do understand where you're coming from. I've just twigged to who you are and agree an AC servo would work well in your hercus, though i'd think that eliminating the belts worthy of consideration to harness the full benefits of running infinitely more accurate motors? A sealed motor would certainly be ideal in your situation with an appropriate IP rating for flood coolant etc. Do you find your screws need regular cleaning also?

Cheers

Ant
 
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