{"id":2965,"date":"2020-10-14T17:56:08","date_gmt":"2020-10-14T17:56:08","guid":{"rendered":"https:\/\/aerotechinc.wpengine.com\/?p=2965"},"modified":"2024-08-20T10:25:36","modified_gmt":"2024-08-20T14:25:36","slug":"automation1-servo-drives-improve-in-position-stability","status":"publish","type":"post","link":"https:\/\/www.aerotech.com\/automation1-servo-drives-improve-in-position-stability\/","title":{"rendered":"Automation1 Servo Drives Improve In-Position Stability"},"content":{"rendered":"

When it comes to characterizing precision mechatronic systems, a meaningful system performance test is the measurement of in-position stability<\/em> or in-position jitter<\/em>. In this test, the axis is commanded to hold a target position and the small motion of the mechanical positioning axis is measured. Many applications require nanometer-level positioning and little-to-no motion when commanded to hold a position. The in-position jitter test quantifies the level of noise that can be expected in these applications.<\/p>

Aerotech’s Automation1 motion control platform offers significant in-position jitter improvements over our previous generation of control products. Figure 1 shows an image of Aerotech’s Automation1 software and some hardware products.<\/p>

\"\"
Figure 1. Aerotech’s Automation1 is a motion and machine control platform that encompasses software, motion controller and drive electronics.<\/figcaption><\/figure>
<\/div>

Air Bearing Stage Drive Performance Tests <\/h2>

An air bearing stage provides a great positioning system to measure in-position jitter induced by control and drive electronics due to the absence of mechanical friction in the positioning stage. Tests were conducted using an Aerotech ABL1500<\/a> air-bearing direct-drive linear stage. The stage, driven by an Aerotech BLMC series brushless linear motor, is mounted to a granite base on a passive air isolation system, supported by a steel weldment. The in-position stability was measured using the integral encoder feedback signal, a 1 Vpp amplified sine-wave encoder with a 4 \u03bcm encoder scale pitch. The stage was commanded to hold position and the in-position noise, as read by the encoder, was recorded and analyzed. <\/p>

Tests were performed on the Automation1 XR3<\/a> multi-axis drive rack with two different slice amplifiers. These tests were compared to the in-position jitter performance of a Npaq drive rack. In addition, the Automation1 XL5e<\/a>, Automation1-XC2e<\/a>, and Automation1-XL2e<\/a> servo motor drives were compared to the performance of the A3200 Ndrive HLe drive.<\/p>

Table 1. In-position jitter noise tests on an ABL1500 as measured by the stage encoder.<\/em><\/p>

\n \n \n \n \n \n \n <\/colgroup>\n \n\n \n\n \n \n \n \n \n \n \n
ABL1500 Air Bearing Tests<\/th><\/th><\/th><\/th><\/tr>\n<\/thead>\n
Automation1<\/strong><\/td><\/td>A3200<\/strong><\/td><\/td> <\/tr>\n
Amplifier<\/strong><\/td>In-position jitter<\/strong><\/td>Amplifier<\/strong><\/td>In-position jitter<\/strong><\/td> <\/tr>\n
XR3: XSP (PWM)<\/td>1.5 nm, rms<\/td>Npaq: DP32010e (PWM)<\/td>4.8 nm, rms<\/td> <\/tr>\n
XR3: XSL3 (Linear)<\/td>0.6 nm, rms<\/td>Npaq: DL4010 (Linear)<\/td>2.8 nm, rms<\/td> <\/tr>\n
XL5e (Linear)<\/td>0.8 nm, rms<\/td>Ndrive HLe (Linear)<\/td>3.3 nm, rms<\/td> <\/tr>\n
XL2e (Linear)<\/td>0.9 nm, rms<\/td><\/td><\/td> <\/tr>\n
XC2e (PWM)<\/span><\/td>1.2 nm, rms<\/span><\/td><\/td><\/td> <\/tr>\n <\/tbody>\n <\/table>\n \n \n \n<\/div>\n
<\/div>

Gantry Bridge-Axis Drive Performance Tests <\/h2>

Tests were conducted using the bridge axis of an Aerotech AGS10000<\/a> gantry. This axis was driven by an Aerotech BLM-264-A motor and carried an ATS150<\/a> Z-axis. The gantry was mounted on a passive isolation material supported by a steel weldment. The in-position stability was measured using the integral encoder feedback signal, a 1 Vpp amplified sine-wave encoder with a 20 \u03bcm encoder scale pitch. The stage was commanded to hold position and the in-position noise, as read by the encoder, was recorded and analyzed.<\/p>

The Automation1 XR3 PWM amplifier was tested against the A3200 Npaq PWM amplifier. The Automation1 XC4e<\/a> and Automation1 XC4<\/a> were tested compared to the Ndrive HPe and Ndrive CP drives, respectively. The results are shown in Table 2.<\/p>

Table 2. In-position jitter noise tests on an AGS10000 bridge-axis as measured by the stage encoder.<\/em><\/em><\/em><\/p>

\n \n \n \n \n \n \n <\/colgroup>\n \n\n \n\n \n \n \n \n \n
Automation1<\/th><\/td>A3200<\/th><\/td><\/tr>\n<\/thead>\n
Automation1<\/strong><\/td><\/td>A3200<\/strong><\/td><\/td> <\/tr>\n
Amplifier<\/strong><\/td>In-position jitter<\/strong><\/td>Amplifier<\/strong><\/td>In-position jitter<\/strong><\/td> <\/tr>\n
XR3: XSP (PWM)<\/td>1.5 nm, rms<\/td>Npaq: DP321010e (PWM)<\/td>4.5 nm, rms<\/td> <\/tr>\n
XC4e (PWM)<\/td>0.9 nm, rms<\/td>Ndrive HPe (PWM)<\/td>1.3 nm, rms<\/td> <\/tr>\n
XC4 (PWM)<\/td>4.9 nm, rms<\/td>Ndrive CP (PWM)<\/td>7.9 nm, rms<\/td> <\/tr>\n <\/tbody>\n <\/table>\n \n \n \n<\/div>\n
<\/div>

Cross-Roller Bearing Stage Drive Performance Tests<\/h2>

Tests were conducted using a cross-roller bearing linear stage driven by an Aerotech linear motor. The stage was mounted to a granite table with passive air isolation supported by a steel weldment. The in-position stability was measured using the integral encoder feedback signal, a 1 Vpp amplified sine-wave encoder with a 4 \u03bcm encoder scale pitch. The stage was commanded to hold position and the in-position noise, as read by the encoder, was recorded and analyzed. <\/p>

The\u00a0Automation1 XR3<\/a>\u00a0linear and PWM amplifiers, as well as the\u00a0Automation1 XL2e<\/a>,\u00a0Automation1 XC2e<\/a> and\u00a0Automation1 XC2<\/a>\u00a0were tested on a common platform. They are each being compared to the A3200’s Ndrive MP, which was tested on a similar platform at an earlier date.\u00a0The results are shown in Table 3.<\/p>

<\/div>

Table 3. In-position jitter noise tests on a cross-roller bearing linear stage as measured by the stage encoder.<\/em><\/em><\/p>

\n \n \n \n \n \n \n <\/colgroup>\n \n\n \n\n \n \n \n \n \n \n \n
Cross Roller Bearing Stage Test<\/th><\/th><\/th><\/th><\/tr>\n<\/thead>\n
Automation1<\/strong><\/td><\/td>A3200<\/strong><\/td><\/td> <\/tr>\n
Amplifier<\/strong><\/td>In-position jitter<\/strong><\/td>Amplifier<\/strong><\/td>In-position jitter<\/strong><\/td> <\/tr>\n
XR3: XSL (Linear)<\/span><\/td>0.11 nm, rms<\/span><\/td>N\/A<\/span><\/td>-<\/span><\/td> <\/tr>\n
XR3: XSP (PWM)<\/span><\/td>0.20 nm, rms<\/span><\/td>N\/A<\/span><\/td>-<\/td> <\/tr>\n
XL2e (Linear)<\/span><\/td>0.12 nm, rms<\/span><\/td>N\/A<\/span><\/td>-<\/td> <\/tr>\n
XC2e (PWM)<\/td>0.18 nm, rms<\/span><\/td>N\/A<\/td>-<\/td> <\/tr>\n
XC2 (PWM)<\/td>0.20 nm, rms<\/span><\/td>Ndrive MP (PWM)<\/td>0.6 nm, rms<\/td> <\/tr>\n <\/tbody>\n <\/table>\n \n \n \n<\/div>\n

1.) Two significant digits are displayed in order to highlight the performance differences.<\/p>","protected":false},"excerpt":{"rendered":"

When it comes to characterizing precision mechatronic systems, a meaningful…<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","_searchwp_excluded":"","footnotes":""},"categories":[956,941,959,933,934,945,938,951,939,942,937,944,940],"tags":[],"content_type":[968],"industry":[973,974,975,978,979,980,981,982],"topic":[992,987,991],"class_list":["post-2965","post","type-post","status-publish","format-standard","hentry","category-3d-metrology-systems","category-aerospace-defense","category-application-note","category-data-storage","category-electronics","category-motion-control-platforms","category-optics-photonics","category-piezoelectric-nanopositioners","category-precision-manufacturing","category-science-research","category-semiconductor","category-stages-actuators","category-test-inspection","content_type-application-note","industry-aerospace-defense","industry-data-storage","industry-electronics","industry-optics-photonics","industry-precision-manufacturing","industry-science-research-institutions","industry-semiconductor","industry-test-inspection","topic-3d-metrology-systems","topic-motion-control-platforms","topic-stages-actuators"],"acf":[],"yoast_head":"\nAutomation1 Servo Drives | Application Note | Aerotech<\/title>\n<meta name=\"description\" content=\"Our Automation1 motion control platform offers significant in-position jitter improvements over our previous generation of control products. 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