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ECG Centerless Series

Computer Numerical Control Centerless Grinder

CNC Control Axis Diagram

1 Axis
Z Axis: Upper or lower slide movement
2 Axes
X Axis: Grinding wheel dressing
Z Axis: Lower slide movement
3 Axes
X, Y Axis: Grinding wheel dressing with interpolation
Z: Lower slide movement
4 Axes
X, Y Axis: Grinding wheel dressing (Profile dressing)
Z Axis: Lower slide movement
Z1 Axis: Upper slide movement
5 Axes
X1, Y1 Axis: Regulating wheel with interpolation
X Axis: Grinding wheel dressing
Z Axis: Lower slide movement
Z1 Axis: Upper slide movement
6 Axes
X, Y Axis: Grinding wheel dressing with interpolation
X1, Y1 Axis: Regulating wheel dressing with interpolation
Z Axis: Lower slide movement
Z1 Axis: Upper slide movement

Machine Design Feature

Specification
  ECG-18CNC ECG-20CNC ECG-24CNC
Grinding Capacity Work diameter (w/standard workrest) mm Ø1-60 Ø1-60 Ø1-80
Work diameter (w/special workrest) mm Ø60-100 Ø60-120 Ø80-150
Auto infeed min. increment mm 0.0001 0.0001 0.0001
Grinding Wheel Wheel size (OD x Width x ID) mm φ455x205xφ228.6 φ510x205xφ304.8 φ610x205xφ304.8
Wheel size (OD x Width x ID) 10type mm φ455x255xφ228.6 φ510x255xφ304.8 φ610x255xφ304.8
Wheel size (OD x Width x ID) 12type mm φ455x305xφ228.6 φ510x305xφ304.8 φ610x305xφ304.8
Motor rated power /  max. torque kw/Nm 11/71(Opt. 15/97) 15/97(Opt. 18.75/120) 15/97(Opt. 22.5/143)
Spindle speed  rpm 1520 1350 1050
Dressing infeed servo motor (X, opt) kw/Nm 0.4 / 2.5 0.4 / 2.5 0.4 / 2.5
Dressing traverse servo motor (Y, opt) kw/Nm 0.75 / 4.9 0.75 / 4.9 0.75 / 4.9
Regulating Wheel Wheel size (OD x Width x ID) 08 type mm φ255x205xφ111.2 φ305x205xφ127 φ355x205xφ152.4
Wheel size (OD x Width x ID) 10 type mm φ255x255xφ111.2 φ305x255xφ127 φ355x255xφ152.4
Wheel size (OD x Width x ID) 12 type mm φ255x305xφ111.2 φ305x305xφ127 φ355x305xφ152.4
Regulating wheel motor kw 3 3 5
Spindle speed (infinite variable) rpm 15-310  15-310 15-310
Dressing infeed servo motor (X1, opt) kw 0.4 0.4 0.4
Dressing traverse servo motor (Y1, opt) kw 0.75 0.75 0.75
Regulating wheel infeed servo motor (Z1, opt) mm 0.05 / 3.5 0.05 / 3.5 0.05 / 3.5
Lower slide infeed servo motor (Z, opt) mm 0.001 / 0.02 0.001 / 0.02 0.001 / 0.02
Swivelling angle (L/R) deg ±5˚ ±5˚ ±5˚
Inclining angle (F/R) mm 0.001 0.001 0.001
Min. infeed unit deg +5˚ ~ -3˚ +5˚ ~ -3˚ +5˚ ~ -3˚
Motor Hydraulic motor kw 0.75 0.75 0.75
Machine Net Weight kg 3300 3400 6100
Gross Weight kg 3600 3700 6600
Packing size (Length x Width x Height ) mm 2700x2240x1850  2700x2240x1850  3580x2240x2070 
Standard accessories
Spindle lubrication system w/ cooling fan
Levelling bolts and blocks
Grinding wheel with flange
Regulating wheel with flange
Manual lubricator for guide ways (S model)
Operation manual and part lists
Thrufeed workrest
Infeed workrest
Control panel (S model)
PLC controller + touch screen + control panel (NC model)
FANUC 0i-TF CNC controller (CNC model)
Tools and tool box
Standard coolant tank
Wheel extractor
Diamond dresser
Optional accessories
Special workrest (for large dia. Workpiece)
Minor diameter workrest (dia. 0.7~8mm)
Vibration feeder auto. loading system
Thrufeed blade (various sizes)
Infeed blade (various sizes)
Hydraulic forming attachment
Forming attachment (forming plates)
Coolant system with magnetic separator
Coolant system with paper filter
Input rail & output rail
Auto. loading system for thrufeed grinding (Φ5~25mm, L 50~600mm)
Hopper type auto. loading system for thrufeed grinding (Φ2~8mm, L 50~180mm)
Infeed grinding workpiece eject attachment (hydraulic / pneumatic / electrical )
Auto. unloading system for thrufeed grinding
Balancing stand/ arbor
Balancing stand/ arbor
Spare grinding wheel flange
CE standard electrical cabinet
EGM350 series CNC control systems are available for MITSUBISHI or FANUC control. It also can operate with graphic conversational programming as optional accessory. With this option, the operator don’t need to use G / M code to edit the programs. Therefore, it is easy to learn and use for grinding operation even for beginners.
EGM350 series CNC control systems are available for MITSUBISHI or FANUC control. It also can operate with graphic conversational programming as optional accessory. With this option, the operator don’t need to use G / M code to edit the programs. Therefore, it is easy to learn and use for grinding operation even for beginners.
EGM350 series CNC control systems are available for MITSUBISHI or FANUC control. It also can operate with graphic conversational programming as optional accessory. With this option, the operator don’t need to use G / M code to edit the programs. Therefore, it is easy to learn and use for grinding operation even for beginners.
A hydraulic dressing unit on both the grinding and regulating wheels provides better dressing effects. Various types of form dressing can be achieved with optional templates. CNC models with two axes servo control and the automatic compensation system can precisely dress forms with complicated shapes.
The machine base is made of Meehanite castings designed to reduce vibration. The machine base provides stable support to the grinding wheel and regulating wheel assemblies to ensure a rigid machine foundation and better accuracy.
A double inverted “V” slideway with optimum spacing for the regulating wheel assembly provides smooth movement and stable grinding operation.
Both grinding & regulating wheel spindles are made of Ni-Cr-Mo alloy steel, which is normalized, carbonized, hardened and grounded.
The regulating wheel utilizes a servo motor which provides infinitely variable speeds. The speed can be set digitally to reach constant surface speeds even when the diameter of the regulating wheel changes. Consequently, better surface finishes and roundness of the workpiece can be achieved. A belt-driven transmission system is also adopted for the regulating wheel for less vibration and noise compare to traditional chain-driven system.
Automatic infeed models (NC) are equipped with a PLC touch screen control with easy learning conversational software. An infeed grinding cycle can be completed by simply choosing the grinding cycle mode (single or automatic), inputting grinding data and then pressing cycle start.