CNC control system for press brakes: synchronised Y1–Y2 beam, back gauge axes and valve outputs

01

Count the axes: the synchronised Y1–Y2 beam plus back gauge axes

Delem's DA-53T is a compact touch control for synchronised press brakes that controls up to 4 axes as standard, described as Y1, Y2 plus 2 auxiliary axes; its standard machine functions are Y1-Y2, X, R-axis and crowning, and the second back gauge axis can be set as a Z axis. [1] Cybelec's CybTouch 12 PS is likewise designed for synchronised press brakes with 4 axes, with six ±10 VDC analog outputs assigned to Y1-Y2-X-R, pressure and crowning. [3]

At the upper end, Cybelec's ModEva 19T controls high-end synchronised press brakes with up to 18 axes, of which 2 are synchronised hydraulic axes. Its datasheet names the axes: Y1-Y2 for the beam; X, X1, X2, X5 and X6 as main back gauge axes; Z, Z2, Z5 and Z6 for left/right movement of the back gauge; R, R2, R5 and R6 for back gauge height; M1 and M2 for die movement; and, as software options, front gauge axes, sheet support axes and tandem operation of two or more coupled press brakes. [4]

The ModEva CNC rack sets the axis count by size and board type: the compact rack with NMX and NSX analog boards controls 2, 4 or 6 axes (Y1, Y2 and 2 or 4 electrical axes); the medium rack controls 4 to 12 axes; with the NCX CANopen axis board either rack reaches 18 axes (Y1, Y2 and 16 electrical axes). Each NMX or NSX board drives 2 analog axes with a ±10 VDC speed command and reads an incremental encoder; an NCX board controls up to 8 axes over a CAN bus. [4]

Editorial note: list the axes your press brake has or needs (for example Y1, Y2, X, R, Z1, Z2 and crowning) before comparing controls; a 4-axis control such as the DA-53T or CybTouch 12 PS covers Y1, Y2 and two back gauge axes, not a six-axis back gauge. [1] [3]

Give the supplier the press brake type (hydraulic synchronised, tandem), beam valve type, list of axes and their drives, crowning type, safety system and safety PLC, required bending functions (automatic sequence, angle measurement, hemming), console mounting, and the languages needed.

02

Match the control outputs to the machine's valves and drives

Delem's DA-66T lists servo or 2-speed AC control, unipolar or frequency inverter control, direct pressure valve control, direct proportional valve control of Y1 and Y2, direct crowning control, multiple digital function outputs and tandem operation; it runs on a 24 V supply and links to Delem's Modusys modules over an HSB bus, with SafetyPLC, protractor and angle control interfacing. [2] The DA-53T integrates the valve amplifier for Y1, Y2 and pressure, and takes single-ended or differential 5 V or 12 V encoder inputs. [1]

Cybelec specifies its analog outputs as ±10 VDC, output impedance under 100 Ω, load at least 2 kΩ (max 15 mA). Where a valve needs current rather than voltage, it lists conversion modules fitted in the electrical cabinet: MSV-402 converts ±10 V to ±50 mA or ±300 mA for servo-valves, and MVP-100 converts 0–10 V to current for pressure and crowning valves; an interface card is offered for HOERBIGER proportional valves. [3] [4]

Encoder requirements differ between the two Cybelec controls: CybTouch 12 PS accepts encoders with or without complementary signals and supplies 5 VDC at up to 250 mA per encoder, while the ModEva CNC requires 5 V DC line-driver encoders with complementary signals. [3] [4]

Editorial calculation: the ModEva CNC power supply is listed as 24 VDC at up to 4 A, so the rack draws up to about 96 W; CybTouch 12 PS lists 30 W at 24 VDC. [4] [3]

03

Compare control formats

The reviewed datasheets describe these formats, from a compact panel to a console with a separate CNC rack.

04

Console, controller and axis boards that drive beam, back gauge and valves

05

Axes, accuracy and screen of the press brake controller

Beam axes, back gauge axes and the valves and drives on the machine decide which control outputs are needed.

06

Send the machine, axis and interface data together

Paste it into your enquiry below or into an email to a maker, then replace every bracket.

Machine: [press brake type; tonnage; length; tandem or single]
Beam: [Y1-Y2 valve type; signal; crowning type]
Axes: [list of back gauge and auxiliary axes; drive type; encoder type]
Interfaces: [safety PLC; angle measurement; protractor; network]
Console: [screen size; mounting; IP rating; languages]
Software: [2D or 3D; automatic bend sequence; offline software]
Environment: [cabinet temperature; humidity]

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