CROMA

All aluminium structure 
Robust frame with hard anodised aerometal beam and Z-axis offers temperature consistency as well as a reduced mass of moving parts and force of inertia to ensure high accuracy during high-speed movement.

Patented triangular beam
The triangular beam design offers a lower centre of gravity, better stiffness and more reliable motion compared to rectangular and cross beams.

Integral dovetail guide way
Integral dovetail guide way on Y-axis reduces the machine weight and helps prevent motional swings during the inspection process to ensure measuring accuracy and stability.

Self-cleaning air bearings
All three axes run on high-precision self-cleaning air bearings, providing smooth movement that reduces wear on the guide ways to maximise equipment durability and minimise repair costs.

High-precision optical scales
European-import, high-precision optical scales installed with one end fixed and the other freely extensible ensures linear expansion and contraction with temperature changes to mitigate the impact of thermal deformation.

DC servo motors
All three axes are driven by DC servo motors, providing stable movement and exact positioning to support accurate probe location and overall measurement.

Specially-designed control system
The IDC-I control system, designed by Hexagon Metrology specifically for the CROMA range, improves the dynamic performance and measuring capabilities of the machine.

Machine Type		CROMA 564	CROMA 686	CROMA 8106	CROMA 8126
Strokes (mm)	X	500	600	800	800
	Y	600	800	1000	1200
	Z	400	600	600	600
Measuring range (mm)	Dx	634	734	934	934
	Dz	144	144	144	144
	Dz1	594	794	794	794
Working plate (mm)	Ph	783	783	805	805
	Py	1155	1355	1555	1755
Support (mm)	Sy	824	978	1178	1378
	Sy1	356	379	379	379
Overall size (mm)	Lx	1050	1150	1350	1350
	Ly	1535	1735	1935	2135
	Lz	2247	2647	2729	2729
Max. part weight		300	300	300	300
Machine wieght (kg)		590	730	1074	1196
MPEe (μm)		2.8 + L / 300	2.8 + L / 300	3.0 + L / 300	3.0 + L / 300
Probe/Sensor	Manual or automatic
Scales resolution μm		0.078	0.078	0.078	0.078
Max. 3D speed (mm/s)		520	520	520	520
Max. 3D acceleration (mm/s2)		1730	1730	1730	1730
Air pressure		120 Nl / min, 0.45 Mpa	120 Nl / min, 0.45 Mpa	120 Nl / min, 0.45 Mpa	120 Nl / min, 0.45 Mpa
Operating temperature		20±2°C	20±2°C	20±2°C	20±2°C
Temperature gradients:
Air temperature variation		1°C / h - 2°C / 24h	1°C / h - 2°C / 24h	1°C / h - 2°C / 24h	1°C / h - 2°C / 24h
Air temperature gradient		1°C / m	1°C / m	1°C / m	1°C / m
HumidityOMA		45% - 75%	45% - 75%	45% - 75%	45% - 75%