The unique features of the E-models
Dual mode for gap and force adjustment
- The EXAKT electronic models use two adjustment modes to control the roller nips (and thus also the dispersion performance):
- Gap mode -- setting of a defined gap between the rollers (display in µm)
- Force mode -- setting of a defined line pressure between the rollers (display of the specific line pressure in N/mm) The set operating parameters for the line pressure in force mode are monitored and regulated constantly - The roller nips can be set independently of one another in gap or force mode
- During operation, the operator can change the selected mode of the roller gap
Automatic roller adjustment for the highest reproducibility
The unique calibration system re-adjusts the rollers with respect to one another each time the machine is switched on. If required, this re-adjustment can also take place after heating of the rollers. In this way, the precise gap size, parallelism of the rollers to one another, and highest reproducibility are guaranteed. Force sensors on the roller axes coupled with precise servo motors keep the roller alignment constant.
Programmability and scale-up
- All operating parameters can be stored in a total of 99 program spaces; this also applies for products that require several passes
- The current operating parameters can be changed and saved during operation; and protection against programme changes can be set up to safeguard production
- Adjustable parameters include the gap size, roller force, and speed, among others
- After calibration, the EXAKT electronic models return automatically to the last set operating parameters
- The controller displays current operating data on the graphic display in both operating modes; this data can be used as the basic for larger production machines (scale-up)
– In gap mode, the gap target values and the currentline pressure between the rollers are displayed
– In force mode, the target and actual values of the line pressure between the rollers as well as the current actual value of the gap are displayed - DataLog for recording of the process parameters is availale as an option
Safety
The EXAKT electronic models unite unique safety functions for table and upright units:
- Cleaning mode: automatic setting to a medium roller gap and limitation of the drive torque to a minimum
- Reverse mode: reverse operation via inching pushbutton - in order to remove foreign objects accidentally pulled into the gap
- Electrical overload protection
- Emergency off switch: on actuation the rollers automatically move apart to the largest possible roller gap (fitted on both sides of 120 EH-450)
- Additional off switch in antenna form near the rear roller gap (for operation without hopper), optional
- Drip tray with integrated hand guard and safety switch, removable for easy cleaning
- Hopper with hand guard
- Draw-in guard (Nip Guard), optional

- Interlocked scraper socket
- Electronic brake
- CE mark
