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ROMER Absolute Arm with external scanner

ROMER Absolute Arm with external scanner

Modular high-end scanning platform.

The ROMER Absolute Arm with external scanner is designed for the high performance laser scanner CMS 108 from Hexagon Metrology. Third party scanners can also be connected.

7-axis Probing and Scanning Specifications – 73-series

Model³	Measuring Range	Probing Point Repeatability¹	Probing Volumetric Accuracy²	Scanning system accuracy SE⁴(with CMS 108)	Arm weights SE
7320SE	2.0 m / 6.6 ft.	± 0.044 mm / 0.0017 in.	± 0.061 mm / 0.0024 in.	0.075 mm / 0.0030 in.	7.9 kg / 17.4 lbs
7325SE	2.5 m / 8.2 ft.	± 0.049 mm / 0.0019 in.	± 0.069 mm / 0.0027 in.	0.080 mm / 0.0031 in.	8.2 kg / 18.1 lbs
7330SE	3.0 m / 9.8 ft.	± 0.079 mm / 0.0031 in.	± 0.100 mm / 0.0039 in.	0.113 mm / 0.0044 in.	8.5 kg / 18.7 lbs
7335SE	3.5 m / 11.5 ft.	± 0.099 mm / 0.0039 in.	± 0.125 mm / 0.0049 in.	0.140 mm / 0.0055 in.	8.8 kg / 19.4 lbs
7340SE	4.0 m / 13.1 ft.	± 0.115 mm / 0.0045 in.	± 0.151 mm / 0.0059 in.	0.172 mm / 0.0068 in.	9.1 kg / 20.1 lbs
7345SE	4.5 m / 14.8 ft.	± 0.141 mm / 0.0056 in.	± 0.179 mm / 0.0070 in.	0.203 mm / 0.0080 in.	9.4 kg / 20.7 lbs

7-axis Probing and Scanning Specifications – 75-series

Model³	Measuring Range	Probing Point Repeatability¹	Probing Volumetric Accuracy²	Scanning system accuracy SE⁴(with CMS 108)	Arm weights SE
7520SE	2.0 m / 6.6 ft.	± 0.023 mm / 0.0009 in.	± 0.033 mm / 0.0013 in.	0.053 mm / 0.0021 in.	8.2 kg / 18.1 lbs
7525SE	2.5 m / 8.2 ft.	± 0.027 mm / 0.0011 in.	± 0.038 mm / 0.0015 in.	0.058 mm / 0.0023 in.	8.5 kg / 18.7 lbs
7530SE	3.0 m / 9.8 ft.	± 0.042 mm / 0.0017 in.	± 0.058 mm / 0.0023 in.	0.078 mm / 0.0031 in.	8.8 kg / 19.4 lbs
7535SE	3.5 m / 11.5 ft.	± 0.055 mm / 0.0022 in.	± 0.081 mm / 0.0032 in.	0.096 mm / 0.0038 in.	9.1 kg / 20.1 lbs
7540SE	4.0 m / 13.1 ft.	± 0.067 mm / 0.0026 in.	± 0.098 mm / 0.0039 in.	0.114 mm / 0.0045 in.	9.4 kg / 20.7 lbs
7545SE	4.5 m / 14.8 ft.	± 0.084 mm / 0.0033 in.	± 0.119 mm / 0.0047 in.	0.133 mm / 0.0052 in.	9.7 kg / 21.4 lbs

Scanning Sensor Specifications

	Hexagon CMS 108
Point acquisition rate	30’000 Points/s
Points per line (max)	Max. 2000
Line frequency (max)	Max. 53 Hz
Line width (mid range)	124 mm / 60mm / 25 mm
Stand off (mid range)	180 mm ± 40 mm
Minimum point spacing (mid range)	0.025 mm
Laser power control	Automatic (per point)
Accuracy (2 sigma) ⁵	20 μm
Weight	398 g
Controller	Yes
Laser Safety	Class 2
Working temperature	10˚-42˚ C (50˚-108˚ F)

All specifications in relation to B89.4.22.

¹The Point Repeatability Test is the reference test to determine measurement arm repeatability with ball probe. The cone is in front of the machine. Points are measured from multiple approach directions. The average point and the deviation of each point to the average center are calculated. The result is the maximum range divided by two.

²The Volumetric Accuracy Test most accurately represents the reasonable expectations for machine performance in practical measuring applications since it involves measuring a certified length standard many times in several locations and orientations and compares the resultant measurements to the actual length. The Volumetric Length Accuracy Test is the most appropriate test for determining machine accuracy and repeatability. The result is the maximum deviation of the measuring distance less the theoretical length.

³SE designates the ROMER Absolute Arm with external scanner.

⁴The Scanning System Accuracy Test most accurately represents the reasonable expectations for machine performance in practical measuring applications while using the laser scanning method. The test consists of measuring a matte grey sphere with 5 different arm articulations. In each articulation of the arm the sphere is scanned from 5 different directions such that the majority of the sphere is scanned. The result is the maximum 3D center to center distance of the 5 spheres.

⁵The sensor accuracy is defined as the excursion of the XY location of a calibration artefact through the measuring range of the sensor.

All probing specifications are achieved with a ROMER Absolute Arm mounted on a ROMER base plate or magnetic base and using a 15 mm steel ball probe with a length of 50 mm under stable environmental conditions.

All CMS 108 scanning specifications are achieved with a ROMER Absolute Arm mounted on a ROMER base plate or magnetic base and using CMS 108 zoom setting 2A (mid range scan width 60mm and point spacing 0.03 mm) and a matte grey calibration sphere 25.4 mm diameter under stable environmental conditions.