LMS 850- 2C+3A/2C+10A Automatic Calibration and Polishing Lines for Marble Strips,Tiles

FEATURES
BASE
Monolithic high-thickness steel base electro-welded with rectified sliding surface.
INTERCHANGEABLE WEAR-PROOF SURFACES
Made with special steel (UBNW.1.446), thickness 3 mm, to guarantee planarity over time and facilitate maintenance.
SURFACE TREATMENT
All parts are treated inside our Company, with hand sand-blasting, cold galvanising and coating with bi-component epoxy base. On request, base and shoulders can be treated with Cataphoresis or hot dip galvanising. All screws are stainless steel.
3-BELT CONVEYOR
Driven by two large-diameter drums and inverter adjustable speed. Unique system to clean and lubricate the belt to ensure uniform sliding. The drive drum is coated with vulcanised rubber to prevent slipping and ensure flow smoothly.
SPINDLE HOLDER BEAM
Sliding on the shoulders fitted with roller cage in oil bath, protected by sealed stainless steel telescopic guards. Hardened steel sliding elements interchangeable and installed on the shoulders and bridge. The spindles are housed in the centre of the beam to ensure complete stability and eliminate any possibility of vibration.
BRIDGE TRANSLATION
With pinion and rack. Central gearmotor and antirotation bar with large diameter. Shifting speed controlled from inverter).
CALIBRATION UNITS
- Calibrator spindle made with heavy steel metalwork with rectified chromeplated sleeve, that slides through cast iron bushing to absorb vibrations during processing. On the spindle plate where it serves as a flywheel and is dynamically balanced, there are calibrator rings with diamond sectors installed on them (Ø 670-870-1050 mm). Electric drive can be 22 or 30 kW.
- An automatic system combined with motor absorption acts on conveyor speed, slowing it in case of excessive overload, making the spindle stop and automatically lift. The spindle is automatically repositioned with absolute precision when the operating cycle starts back up again. The calibrator is managed from the touch screen for all of its automatic and manual functions. Automatic positioning at the pre-selected height with centesimal precision.
POLISHING UNITS
- Cast iron polishing spindles, installed in the centre of the beam, with thick and rectified chrome-plated steel shaft, sliding on bronze bushing, complete with pneumatic cylinder for lifting abrasive carrier plate.
Each spindle is fitted with a pressure gauge to control pressure and counter-pressure to balance the head during the work.
- Motors. 7.5 or 11 kW motors with single or sequential start-up. Drive transmission through high-output pulleys and belts.
- Ø 470/510 aluminium alloy polishing plates complete with Frankfurt fittings for seven abrasives. They are equipped with a multidirectional shock absorbing system to ensure maximum operating homogeneity and efficiency of the abrasive.
- Automatic centralised lubrication system of the spindles with the possibility of setting quantities and intervention.
- Abrasive finished. The machine is equipped with a system to set the thickness of the piece being processed based on which, a sensor installed on each head, calls the attention of the operator to replace the abrasive, when finished.
- Slab-guide supports with screw movement through flywheel from a unique station, complete with stainless steel slab-guide.
- Material presence detection unit to control the automatic up/down movement of heads in case of discontinuity between pieces.
SAFETY AND PROTECTIONS
- Front PLT doors with interlocking limit switch to avoid opening before the spindles stop. Side and rear stainless steel guards, easy to inspect.
ELECTRONICS: THE "THINKING HEART" OF LMS
- Reliable. After careful testing, the parts are chosen from the leading companies in the specific sectors. To minimise the probability of failure or interference, a modern “can open” network system is installed on board, which drastically reduces the number of cables between sections.
- Software developed entirely by GMM, guaranteed over time, improvable and most of all customizable according to customer requirements.
- 12" Touch Screen. Interactive graphics for complete machine cycle management with start-up in sequence of spindles, conveyor motor and bridge motor. To manage spindle down/up based on piece presence.
To view the abrasive consumption status for each head.
- Data base. Broad possibility to store large amounts of information about work done or in process.

Parameters	Unit	2C+3A	2C+4A	2C+6A	2C+8A	2C+10A
Calibrating spindle power	kw	22	22	22	22	22
Slabs min. processable width	mm	300	300	300	300	300
Calibrating plate diameter	mm	850	850	850	850	850
N° Calibrators	nr	2	2	2	2	2
Slabs max. processable width	mm	800	800	800	800	800
Bridge travel power	kw	1.5	1.5	2.2	3	3
Polishing plates diameter	mm	470	470	470	470	470
N° Frankfurt	nr	7	7	7	7	7
Slabs min. processable thickness	mm	10	10	10	10	10
Slab polishing speed	m/min	0.7/7 (min/max)	0.7/7 (min/max)	0.7/7 (min/max)	0.7/7 (min/max)	0.7/7 (min/max)
Conveyor system forward speed	m/min	0.7/7 (min/max)	0.7/7 (min/max)	0.7/7 (min/max)	0.7/7 (min/max)	0.7/7 (min/max)
Number of polishing heads/honing units	nr	3	4	6	8	10
Machine overall length	mm	6900	7450	8550	9650	10750
Total installed electrical power	kw	70	78	94	110	126
Cooling water requirement	L/min	140	160	200	240	280
Polishing heads/honing units motor power	kw	7,5	7,5	7,5	7,5	7,5
Approx. Weight	Kg	8360	9180	10820	12460	14100
Machine overall width	mm	2300	2300	2300	2300	2300
Slabs max. processable thickness	mm	100	100	100	100	100
Machine overall height	mm	2400	2400	2400	2400	2400
Beam crosswise movement speed	m/min	5/18 (min/max)	5/18 (min/max)	5/18 (min/max)	5/18 (min/max)	5/18 (min/max)
Belt advancement motor power	kw	2,2	2,2	3	3	4