Servo Drives Information Servo drives provide electrical outputs to servo motors in closed-loop motion control systems that use positional feedback and corrective signals to optimize position, speed, and accuracy. They control one or more axes, provide analog or digital control signals, and often feature integral motion controllers. Servo drives are used with many different types of motors. AC and DC motors feature brushed or brushless designs and are suitable for a variety of industrial...
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Q & A on Servo Drives

We asked our users for their input on Servo Drives. Here are the results of 45 users familiar with Servo Drives.

Who Took Our Poll? | Design Trends | Applications and Use | Features | Buying Advice |

Who Took Our Poll?Top

Design TrendsTop

Q:
What new technologies are influencing servo drive design?
5 answers
Answers:
Fast Feedback (Endat, BISS, etc); Improve Tuning algorithm, Fast control bus (e.g.: Ethercat, Synqnet, Sercos 3)
~Alaor Saccomano, Product Manager, Sao Paulo, Brazil
Miniaturization, non contact - low force high speed work - not new but still demanding.
~Dave H, Engineering Consultant, Melbourne, Australia
Decentralized Drives, IP65 class of protection, safety (Speed and Torque)
~Virupakshappa Hovale, General Management, Bangalore, India
Digital, naturally.
~K M, Engineering Consultant, Corona, CA
Integrated
~Huy viet Nguyen, Process Engineer, 12345, Vietnam

Q:
From your perspective, which companies are creating the most innovative servo drives?
5 answers
Answers:
Generally, all good that I have used, and other good servo companies have left the scene.
~Dave H, Engineering Consultant, Melbourne, Australia
1) Yaskawa 2) Fuji 3) Panasonic 4) Lenze
~Jim C, Engineer, Georgetown, Malaysia
Kollmorgen, Panasonic, AMK
~Alaor Saccomano, Product Manager, Sao Paulo, Brazil
Packing machine
~Huy viet Nguyen, Process Engineer, 12345, Vietnam
Rockwell
~Virupakshappa Hovale, General Management, Bangalore, India

Applications and UseTop

Q:
What are some of the applications you have used servo drives for?
17 answers
Answers:
1) XYZ cartesian robots. 2) Belt drive linear actuators. 3) Ballscrew drive linear actuators. 4) Direct drive rotary turn table. 5) Linear servo.
~Jim C, Engineer, Georgetown, Malaysia
Point to point motion, Interpolated applications, Pick and Place, Packaging, metal cutting, Assembly, ware housing, grinding,.... many more
~Virupakshappa Hovale, General Management, Bangalore, India
Slitter scores, rotary knife, fly sheer, tool machines, flow pack systems, pick n place, replace in Robots, etc
~Alaor Saccomano, Product Manager, Sao Paulo, Brazil
Packing machine, conveyor, machine screw cap bottle, sewing machines...
~Huy viet Nguyen, Process Engineer, 12345, Vietnam
For Loading and unloading of billets in/from Oil fired furnace.
~Maintenance/Facilities Management, PUNE, India
Siemens, Fanuc, Sanyo, Denki, Yaskawa, Baumuller
~Technical Support/Services, Petah Tikva, Israel
Hybrid Plastic extrusion, motion control
~Engineering, Consulting, Pune, India
CNC machine tools, materials handling
~Dave H, Engineering Consultant, Melbourne, Australia
Conveyor. bottling, baggage handling
~Tim Hedger, Marketing/Sales, Auckland, NZ
Printing and cuting machine
~Technical Support/Services, Beirut, Lebanon
Feed axis in cnc machine
~Manufacturing, Jbail, Saudi Arabia
Machinery, automotive
~Technical Support/Services, Brno, Czech Republic
Cnc machines drives
~Engineering, Design, Pune, India
Packaging Forming
~Marketing/Sales, Henrico, VA
MACHINE TOOLS
~Technical Support/Services, Grottammare, Italy
Positioning
~Engineering, Consulting, Devizes, Great Britain
Antennas
~K M, Engineering Consultant, Corona, CA

Q:
Please share with us any “non-standard” applications that servo drives have been used for.
1 answers
Answers:
Nothing out of the ordinary.
~Dave H, Engineering Consultant, Melbourne, Australia

Q:
Do you know of any disastrous mistakes that occurred due to the incorrect usage of servo drives?
3 answers
Answers:
Problems can occur with guarding which inadvertently derates the motor, services which do not adequately house or move the cabling, inadequate high voltage segregation in cable ducting. In low cost DC units the builders must recognize servo run away as an ever present danger during commissioning and servicing. Especially on loss of velocity feedback. Observe safe work practice, keep others out of the machine area. When testing without a fully functional PLC or without CNC position protection, think through the consequences before starting, disconnect the load if necessary. When setting an axis up, run a program that adequately reflects the actual machine duty, eg don't continuously cycle a low duty axis. Before commencing movement check that prior tests are complete, eg servo dead-stops are present and working, lubrication is present and working. Always beneficial on a new machine if size and access allow to wind the axis by hand over the full travel to pick up any interference or change in load. If many are working on the project work from a document and review status each morning.
~Dave H, Engineering Consultant, Melbourne, Australia
1) Servo overload resulting in vertical axis falling down.
~Jim C, Engineer, Georgetown, Malaysia
Unfortunately yes, applied in a toy.
~Alaor Saccomano, Product Manager, Sao Paulo, Brazil

FeaturesTop

Q:
What would your design or feature "wish list" be for this product?
4 answers
Answers:
Best features - to be intrinsically safe, to work directly from mains voltage, to avoid heating the cabinet unduly, to stay leak proof and noise resistant, to fault without damage to the power stage - all pretty much standard but it keeps the cost of operating CNC down. If anything, cabling and connectors are the critical items in service. Also, minimum setup time before service is a must.
~Dave H, Engineering Consultant, Melbourne, Australia
1) Response time. 2) Easy tuning. 3) Easy parameter setting. 4) Able to save & backup parameters via communication port. 5) Able to command servo to move via communication port. 6) Able to read status of servo via communication port. 7) Compact size. 8) Single phase AC voltage input. 9) Able to control servo drives via USB/LAN connection.
~Jim C, Engineer, Georgetown, Malaysia
Robust control against great load variables, Self-backlash compensation, easy motion control programming
~Alaor Saccomano, Product Manager, Sao Paulo, Brazil
Accurate position control
~Huy viet Nguyen, Process Engineer, 12345, Vietnam

Buying AdviceTop

Q:
Do you have any advice for people relative to buying or using servo drives?
5 answers
Answers:
The main requirement is to understand the duty cycle and the operating conditions throughout the year. Allow enough from the project budget to run the cabling and services in a professional manner. It is generally difficult and labor intensive and, its useful to have people around with prior experience.
~Dave H, Engineering Consultant, Melbourne, Australia
First of all: study your mechanical system, and check if your servo choice matches in your case. After, if you are not an expert in servo systems and needs make a application...find an expert.
~Alaor Saccomano, Product Manager, Sao Paulo, Brazil
Look for tomorrow, total solutions, create infrastructure to share information across network / plant automation.
~Virupakshappa Hovale, General Management, Bangalore, India
Customers select the correct code, see carefully the characteristics of servo.
~Huy viet Nguyen, Process Engineer, 12345, Vietnam
1) Suppliers with good technical support.
~Jim C, Engineer, Georgetown, Malaysia

Q:
Is there any advice you want to share with users to help them avoid common errors in selection or usage of servo drives?
5 answers
Answers:
If in doubt, go one size up. Size the cabinet to accommodate the servo equipment and leave 30% free room if possible on project machines. Watch the motor to load inertia ratio. If its a product then test the prototype long enough to confirm your design. If you are short on experience, speak with service people to find out how others do it and what they have seen.
~Dave H, Engineering Consultant, Melbourne, Australia
Never apply a servo system without a power reserve; keep all original cables; avoid compliances and backlash.
~Alaor Saccomano, Product Manager, Sao Paulo, Brazil
When replacing servo should pay attention to the technical characteristics of servo.
~Huy viet Nguyen, Process Engineer, 12345, Vietnam
Make sure the whole loop can deliver the motion required, not just the servo specs.
~K M, Engineering Consultant, Corona, CA
1) Inertia selection for rotary applications.
~Jim C, Engineer, Georgetown, Malaysia

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