Servo drive with motor: when to take one over a stepper, and when a VFD is enough
We take a servo drive with a motor when you need 0.01° positioning accuracy and instant response to load change. A typical customer of ours this year: a CNC milling shop installs a Delta ASDA-A2 1 kW on the X/Y table feed, because a stepper drops steps at high speed. Budget: a 1 kW servo costs 3-5x more than a stepper of the same rating. If you have a rotating load with no precise stop (fan, pump), you do not need servo; take a VFD.
The bestseller from our stock is Delta ASDA-A2-1021-M (1 kW, analog plus pulse input, EtherCAT, 2500-3500 EUR with the ECMA-C20807RS motor). Budget tier: Veichi SD500-A (Chinese, but solid; ships into 3D printers, small machines). Premium tier: Yaskawa Sigma-7 SGD7S (Japan, 24-bit continuous resolution, picked for optics, electronics). Mitsubishi MR-J5 for shops that already run on a Mitsubishi PLC.
What we ask before sizing: torque, speed, inertia
One: shaft torque (Nm) at peak acceleration. We add a 30% margin, otherwise the motor overheats on cycles above 1000 starts/hour. Two: max rotational speed in your motion profile. Servo runs up to 5000-6000 rpm, but torque drops above 3000. Three: load inertia versus motor inertia. The classic rule: ratio no higher than 10:1 for a basic drive, up to 30:1 with adaptive control like ASDA-A3. Higher than that the servo will hum, you need a gearbox.
We keep four main brands: Delta Electronics (Taiwan, most popular, ASDA-A2/A3/B3, 5000+ models), Veichi (China, budget, SD500/SD700), Yaskawa Sigma-7 (Japan, premium for electronics), Mitsubishi MR-J5 (for the Mitsubishi PLC platform). Manufacturer warranty 1-3 years, delivery from our Kyiv warehouse 1-3 days. Customers often order them together with a Delta DVP PLC as a ready solution for SEMI machines or lathes.
| Model | Series | Power, kW | Supply | Protocol | Application |
|---|---|---|---|---|---|
| ASD-M-0723-L | ASD-M | 0.7 | 3-ph/220V | RS-232, RS-485 | Compact CNC machines, winding equipment |
| ASD-A2-0723-U | ASDA-A2 | 0.7 | 3-ph/220V | RS-485, E-Cam | Packaging machines with electronic cam |
| ASD-B2-0121-B | ASDA-B2 | 0.1 | 1-ph/220V | RS-232, RS-485 | Small mechanisms, laboratory equipment |
| ASD-M-1521-R | ASD-M | 1.5 | 3-ph/220V | RS-485, E-Cam, DMCNET | Multi-axis systems, conveyors |
| SD600A-T3-3R0 | SD600 | 3.0 | 3-ph/380V | RS-485 | Industrial presses, extruders |
Servo Driver Manufacturers
Our catalog features servo drivers from two brands with confirmed sales records in Ukraine:
- Delta Electronics — ASDA-A2 series (flagship with EtherCAT and E-Cam, 0.1-15 kW), ASD-M (compact models 0.7-2.0 kW, best-seller), ASDA-B2 (economy class 0.1-2.0 kW for basic tasks). Free ASDA-Soft software for configuration and diagnostics.
- Veichi — SD600 series (versatile, 0.2-7.5 kW, RS-485/CANopen) and SD700 (high-performance, 0.2-37 kW, EtherCAT support). Alternative to Delta for high-power systems above 15 kW.
Servo Drivers by Specifications
Select a servo driver by key parameters: 1-phase 220V supply for small mechanisms or 3-phase 220/380V for industrial equipment. By protocol: basic RS-485 for simple control, EtherCAT or DMCNET for high-speed multi-axis synchronization. Browse the full servo drive catalog for comprehensive selection.
Warranty and Support
All servo drivers carry official manufacturer warranty: Delta Electronics — 24 months, Veichi — 18 months. Technical support includes parameter configuration assistance, compatible servomotor selection and control system integration. Delivery across Ukraine via Nova Poshta, Ukrposhta. Payment options: bank transfer for legal entities with VAT, cash on delivery, card prepayment.
