USB Serial Stepper Motor Controller

USB Serial Stepper Motor Controller

SKU: KTA-290

Four axis stepper motor controller fitted with USB and RS-485 ports. Takes simple serial commands and produces ramped frequency profiles for stepper or servo motor control. 

New Version: Now with analog inputs and can be powered from 8 to 35 VDC.

Ocean Controls
  • Manufacturer: Ocean Controls
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The KTA-290 is a USB or RS-485 controller card that generates the pulses to feed to up to four axes of stepper or servo motor drivers. Simple commands allow the independent motion of the motors. The controller is an upgraded version of our popular KTA-190.

The step and direction outputs of the card can connect directly to almost any stepper or servo motor driver, including the full range of our Leadshine motor drives.

Once connected to a computer, the card appears as a virtual serial (COM) port. The card also acts as a USB to RS-485 serial converter, allowing you to multidrop up to 4 interface cards off the RS-485 serial line. This allows control of up to 16 axes of motors.

The KTA-290 is a major improvement over our KTA-190, featuring more accurate frequency generation, smoother ramping and USB communication. It uses many of the same simple ASCII commands.

The KTA-290 is also available in a DIN rail mount version.

Motors connected to the 290 are controlled using simple ASCII commands. Any terminal program (Hyperterm, TeraTerm, RealTerm etc.) or programming language capable of sending strings out a serial port can be used to generate the strings for the controller. We provide a free Windows example program with Visual Basic source code that allows a sequence of commands to be sent out the serial port.

Examples of the commands:

@01 AMOV 1000 2000 4000 do an absolute move of stepper 1,2 and 3 to positions 1000, 2000 and 4000
@01 AMOV 2000 do an absolute move of stepper 1 to position 2000
@02 RMOV -400 do a relative move of stepper 2 400 steps backwards
@03 POSN 10000 indicate stepper 3 is at position 1000
@04 STOP stop all motors connected to the card
@01 STAT card sends the status of motors 1 to 4 whether they are moving or not and status of limit switches.

Please note these are not G-Code commands and it will not accept G-Code

Positions are stored internally as signed, 32 bit integers allowing for a range of more than ±2 billion steps

The user can also set the acceleration and deceleration rates when starting and ending a sequence of steps. Limit switch inputs are available for each of the motors to prevent motors moving out of range.

The card also features 2 relays which can be switched on or off.

  • Power Supply: 8 to 35VDC
  • Power Consumption: ~1.5W + External 5V drain
  • Operating Temperature: 0 to 70°C
  • 2 x Analog Inputs: accept 0 to 32VDC
  • 2 x Limit Switch Inputs: for each motor
  • 2 x Auxiliary Input-Outputs: accept 0 to 2.048VDC
  • 2 x Relay Outputs: for controlling, SPST relays, switch to 5A and 30VDC
  • 4 x Step and Direction Outputs: 5 VDC signal levels
  • Controls 4 axes of stepper or servo motors simultaneously
  • Up to 40 kHz max stepping rate
  • Protocol: ASCII protocol
  • USB Virtual serial port or RS-­485 input
  • Easily connect multiple units by RS-­485 for up to 16 axes
  • Baud rate selectable
  • Parameters can be stored in non-volatile EEPROM
  • XOR checksum option
  • DIN rail mount
  • Dimensions: 92L × 78W × 25H (mm)
    • SKU
    • Weight
      0.08 kg
    • Dimensions (L x W x H)
      15 x 10 x 2 cm

Faulty Goods and Warranty

Where such goods have been supplied we undertake to repair or replace them as quickly as possible.Prior to returning faulty items, please contact us with a description of the fault as one of our engineers might be able to assist you by resolving the issue over the phone.
A Warranty form must be filled out and returned with any goods.

Our standard warranty period is 12 months from the date of purchase unless stated otherwise.

Other warranty periods:

Labjack Products: 5 Years
Atop Products: 3 Years
MeanWell Products: 3 Years
Terracom Products: 3 Years

Warranty is subject to us being satisfied that a defect was caused by defective workmanship or materials and was not caused by or was not substantially contributed to by other factors beyond our control including incorrect installation, alterations or modifications of the product not recommended by the manufacturer.

Returns Policy

If you are dissatisfied with our goods you may return them within 14 days of the dispatch date. Contact us for an authorisation and we will refund your purchase less shipping costs and restocking fees. All returned goods MUST be in AS NEW condition including ALL PACKAGING and DOCUMENTATION / MANUALS etc.

Please note:

  • The product returned will attract a 20% restocking fee.
  • The customer must pay the delivery costs.
  • Non standard, custom made or a specially manufactured or imported products are not returnable.
  • Semiconductors, books and software are not refundable

Full Terms and Conditions

By placing an order with Ocean Controls, you agree to be bound by our Terms and Conditions of Trade.

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