{"id":996,"date":"2020-11-12T17:18:04","date_gmt":"2020-11-12T17:18:04","guid":{"rendered":"https:\/\/www.axcontrol.com\/blog\/?p=996"},"modified":"2021-05-19T11:42:59","modified_gmt":"2021-05-19T11:42:59","slug":"typical-repairs-on-motors-and-drives","status":"publish","type":"post","link":"https:\/\/www.axcontrol.com\/blog\/2020\/typical-repairs-on-motors-and-drives\/12\/11\/","title":{"rendered":"Motors and Drives: Typical Repairs"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"alignright size-large is-resized\"><img data-attachment-id=\"1398\" data-permalink=\"https:\/\/www.axcontrol.com\/blog\/2020\/typical-repairs-on-motors-and-drives\/12\/11\/pexels-rfstudio-3825584\/\" data-orig-file=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/05\/pexels-rfstudio-3825584-scaled.jpg\" data-orig-size=\"1828,2560\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"pexels-rfstudio-3825584\" data-image-description=\"&lt;p&gt;person working on an industrial drive &lt;\/p&gt;\n\" data-image-caption=\"\" data-medium-file=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/05\/pexels-rfstudio-3825584-214x300.jpg\" data-large-file=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/05\/pexels-rfstudio-3825584-731x1024.jpg\" decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/05\/pexels-rfstudio-3825584-731x1024.jpg\" alt=\"Close up image of a repair in process.  Motors and drives sometime need repairs. \" class=\"wp-image-1398\" width=\"273\" height=\"382\" srcset=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/05\/pexels-rfstudio-3825584-731x1024.jpg 731w, https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/05\/pexels-rfstudio-3825584-214x300.jpg 214w, https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/05\/pexels-rfstudio-3825584-768x1075.jpg 768w, https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/05\/pexels-rfstudio-3825584-1097x1536.jpg 1097w, https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/05\/pexels-rfstudio-3825584-1463x2048.jpg 1463w, https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/05\/pexels-rfstudio-3825584-1200x1680.jpg 1200w, https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/05\/pexels-rfstudio-3825584-scaled.jpg 1828w\" sizes=\"(max-width: 273px) 85vw, 273px\" \/><figcaption>Sometimes repairs are needed.  We can help. <\/figcaption><\/figure><\/div>\n\n\n\n<p>At AX Control we do a lot of repairs on motors and drives.&nbsp; Not only do we offer repair services for our customers, but we also examine every reconditioned part leaving our warehouse for defects and optimize its performance before it gets boxed up for transit.&nbsp; Our people get plenty of hands-on time with all sorts of drives and motors.&nbsp;<\/p>\n\n\n\n<p>Skilled technicians take care of all our repair work.   We back up that work with a 2-year warranty for AC\/DC and <a href=\"https:\/\/www.axcontrol.com\/automation\/reliance-electric\/electro-craft-bsa-series\">Servo Drives<\/a>, and a one-year warranty for Motors.\u00a0\u00a0<\/p>\n\n\n\n<p>But do you know what may lead to your components needing repair?&nbsp; We get there&#8217;s a lot to know about industrial automation equipment.   We thought we would offer up a list of the most common causes we\u2019ve noticed, partitioned by type of drive or motor.&nbsp;&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">AC Drives<\/h2>\n\n\n\n<p>There have been many technological advances in the field of <a href=\"https:\/\/www.axcontrol.com\/automation\/reliance-electric\/gv6000-drives\">AC Drives<\/a> that have brought more features to these drives even as they\u2019ve decreased in size and cost.\u00a0\u00a0<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img data-attachment-id=\"1114\" data-permalink=\"https:\/\/www.axcontrol.com\/blog\/2020\/typical-repairs-on-motors-and-drives\/12\/11\/15v4150-ac-drive\/\" data-orig-file=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/02\/15v4150-ac-drive.jpg\" data-orig-size=\"498,700\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"15v4150-ac-drive\" data-image-description=\"&lt;p&gt;AC drive provided by Reliance Electric&lt;\/p&gt;\n\" data-image-caption=\"\" data-medium-file=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/02\/15v4150-ac-drive-213x300.jpg\" data-large-file=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/02\/15v4150-ac-drive.jpg\" decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/02\/15v4150-ac-drive.jpg\" alt=\"AC Drive from Reliance Electric\" class=\"wp-image-1114\" width=\"368\" height=\"517\" srcset=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/02\/15v4150-ac-drive.jpg 498w, https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/02\/15v4150-ac-drive-213x300.jpg 213w\" sizes=\"(max-width: 368px) 85vw, 368px\" \/><figcaption>The<a href=\"https:\/\/www.axcontrol.com\/automation\/reliance-electric\/gv3000-drives\/15V4150\"> 15V4150 Reliance GV3000 15 HP AC Drive<\/a> is one AC drive in our stock. <\/figcaption><\/figure><\/div>\n\n\n\n<p>The primary driver of repairs in AC Drives, without a doubt,&nbsp; is heat. &nbsp; This may come from various sources, but when you get to the root of the problem heat is the cause of the damage.&nbsp;&nbsp;<\/p>\n\n\n\n<p>Here are a few of the most common ways heat strikes:&nbsp;<\/p>\n\n\n\n<ul><li><strong>A dusty environment.<\/strong>&nbsp; When fans aren\u2019t cleaned on a regular basis, the drive can\u2019t pull air through, and heat builds up.&nbsp; Protection is easy: maintain a regular maintenance schedule and keep fans and other heat dissipating equipment clean.&nbsp; Try to cut down on the amount of dust in your environment through mitigation.&nbsp;<\/li><li><strong>Power spikes.<\/strong>&nbsp; These can come from other machines, from lightning strikes, or from your main power line. &nbsp; You can often limit these problems by adding a line reactor in front of your drive system to protect from transients and power surges.&nbsp;<\/li><li><strong>Too much power draw<\/strong>.&nbsp; If a drive is attached to a poorly-maintained motor, such as one with ungreased bearings, too much bearing wear, or shaft imbalance, this can cause a mechanical overload that increases the motor\u2019s demand on the drive.&nbsp; Connected systems have to be maintained together or they will die together.&nbsp;<\/li><\/ul>\n\n\n\n<!--more-->\n\n\n\n<p>Age can also play a part in determining when an AC Drive requires repair.&nbsp; It\u2019s natural for things to move toward disorder; even the second law of thermodynamics says entropy always increases with time.&nbsp; Luckily, industrial parts are designed to last, and AC Drives typically have a decades-long mean time to failure rate.&nbsp; But drives are rather like older cars: preventive maintenance done before a problem occurs can be significantly less expensive and have a better return than repairs done after a problem has presented itself.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">DC Drives<\/h2>\n\n\n\n<p>The primary function of a DC drive is DC motor speed control. The rate of speed within the motor is proportional to the armature voltage and is inversely proportional to the field current.&nbsp;&nbsp;<\/p>\n\n\n\n<p><a href=\"https:\/\/www.axcontrol.com\/automation\/reliance-electric\/dc3-drives\">DC Drives<\/a> are typically Analog or Digital, with digital offering more parameter variations, and thus more options overall.\u00a0<\/p>\n\n\n\n<p>Repairs to DC Drives have the same root causes as AC Drives: most repairs are driven by heat and age.&nbsp; Direct current drives can be especially prone to damage at the point of entry for communication from a connected PLC, which may allow transients to damage the port or internal drive components. &nbsp; Additionally, DC Drives may need repair because of an internal short to ground in a connected motor.&nbsp;&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Variable Frequency Drives<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-attachment-id=\"997\" data-permalink=\"https:\/\/www.axcontrol.com\/blog\/2020\/typical-repairs-on-motors-and-drives\/12\/11\/800px-variable-frequency_drive_system\/\" data-orig-file=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2020\/11\/800px-Variable-frequency_Drive_System.png\" data-orig-size=\"800,419\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"800px Variable Frequency Drive System\" data-image-description=\"&lt;p&gt;Variable Frequency Drive System photo describing power conversion&lt;\/p&gt;\n\" data-image-caption=\"\" data-medium-file=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2020\/11\/800px-Variable-frequency_Drive_System-300x157.png\" data-large-file=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2020\/11\/800px-Variable-frequency_Drive_System.png\" decoding=\"async\" loading=\"lazy\" width=\"800\" height=\"419\" src=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2020\/11\/800px-Variable-frequency_Drive_System.png\" alt=\"Diagram of a Variable Frequency Drive System \" class=\"wp-image-997\" srcset=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2020\/11\/800px-Variable-frequency_Drive_System.png 800w, https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2020\/11\/800px-Variable-frequency_Drive_System-300x157.png 300w, https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2020\/11\/800px-Variable-frequency_Drive_System-768x402.png 768w\" sizes=\"(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 61vw, (max-width: 1362px) 45vw, 600px\" \/><figcaption>Variable Frequency Drive System.  Used under CC 3.0.  Original uploader C J Cowie at en.wikipedia <\/figcaption><\/figure>\n\n\n\n<p>VFD drives take incoming fixed AC voltages and internally convert them to variable VAC outputs. &nbsp; They\u2019re capable of translating voltage and frequency to another V\/F in order to vary motor speed without a loss of torque.&nbsp;&nbsp; These drives come in three main types: <\/p>\n\n\n\n<ul><li><strong>variable torque<\/strong>, often used in pumps, blower systems, and centrifugal fans<\/li><li><strong>constant torque<\/strong>, typically used for positive displacement applications or conveyor systems<\/li><li><strong>constant power systems<\/strong>, used for traction applications and power tools. <\/li><\/ul>\n\n\n\n<p>Like other drives, VFD drives are susceptible to heat damage.&nbsp; Cooling fan failure is a primary issue resulting in increased heat and thus, damage.&nbsp; Make sure to inspect and clean cooling components on a regular basis. But other problems can occur, too, such as&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<ul><li><strong>Moisture infiltration in motors or drives<\/strong>. &nbsp; This can result in corrosive damage to internal circuitry.&nbsp; If your plant is damp, you may want to consider adding dehumidifiers.&nbsp; Additionally, sudden changes in temperature can also cause condensation to occur, so try to avoid sudden temperature changes.&nbsp;&nbsp;<\/li><li><strong>Loose connections in motors or drives<\/strong>. These can cause arcing and overcurrent faults. &nbsp; Correcting this sort of issue requires more than tightening down all screw connections.&nbsp; If you\u2019re having a problem with arcing, it may be time for a complete inspection of your drive by a qualified technician.&nbsp;<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Servo Motors &amp; Drives<\/h2>\n\n\n\n<p>Servo systems use a motor, a controller, a feedback unit, and a drive. &nbsp; These systems provide precise control adjusting for linear and angular position, velocity, torque, and acceleration. &nbsp; Servos are very small, showing up in everything from RC aircraft to robotics, as well as woodworking, printing, and conveyor belts.&nbsp;&nbsp;<\/p>\n\n\n\n<p>Servos are also prone to overheating, especially when the system must run for extended periods of time. &nbsp; Servo motors require a clean environment and proper airflow.&nbsp; Bearings sometimes go bad, or the motor axis may bind.&nbsp;&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">DC Motors<\/h2>\n\n\n\n<p>DC Motors are the workhorses of industrial automation.&nbsp; But it\u2019s important to give them proper maintenance to maintain their lifespan.&nbsp; Some of the most common issues we see with DC motors are:&nbsp;<\/p>\n\n\n\n<ul><li><strong>Maintenance of Brushes and Commutators<\/strong> <strong>not given proper attention<\/strong>.&nbsp; Check brushes for wear or chipping, and check the drive to make sure there\u2019s adequate spring tension. This keeps brushes against the commutator and properly aligned. Grooves or scratches on the commutator indicate brush sparking. Rough or blackened spots suggest the same.  The resulting carbon dust\/debris can excessively damage the commutator if left for too long.&nbsp;<\/li><li><strong>Bearings not properly lubricated.<\/strong> &nbsp; Some bearings in low horsepower motors never require lubrication.&nbsp; But for many motors, your lubrication schedule is critical.&nbsp; If your motor is hot to the touch or thumps or grinds when running, it may be beyond lubrication and into bearing failure.&nbsp; Check for worn bearings or rough races to determine your course of action.&nbsp;<\/li><li><strong>Failed field winding<\/strong>.&nbsp; This can also show up as brush sparking.&nbsp;&nbsp;<\/li><\/ul>\n\n\n\n<p>If you need help with any of these repairs, talk to the experts here at AX Control.\u00a0 We can help you with servo motor repairs, Variable Frequency Drive repairs, AC drive repairs, DC drive repairs, and DC motor repairs.\u00a0<\/p>\n\n\n\n<p> We\u2019re also capable of helping you with a number of other industrial automation repair services. Check our <a href=\"https:\/\/www.axcontrol.com\/repair\">repair page<\/a> for more details and a complete list of the products we service.\u00a0<\/p>\n\n\n\n<p class=\"has-text-align-center\">Looking to purchase motors and drives? We can help with that too. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>At AX Control we do a lot of repairs on motors and drives.&nbsp; Not only do we offer repair services for our customers, but we also examine every reconditioned part leaving our warehouse for defects and optimize its performance before it gets boxed up for transit.&nbsp; Our people get plenty of hands-on time with all &hellip; <a href=\"https:\/\/www.axcontrol.com\/blog\/2020\/typical-repairs-on-motors-and-drives\/12\/11\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Motors and Drives: Typical Repairs&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false},"categories":[10],"tags":[294,293,296,297,292,295],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Motors and Drives: Typical Repairs - AX Control, Inc.<\/title>\n<meta name=\"description\" content=\"Motors and drives can be damaged from heat, or from other problems like trapped moisture and dirt. We talk about the most common issues.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.axcontrol.com\/blog\/2020\/typical-repairs-on-motors-and-drives\/12\/11\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Motors and Drives: Typical Repairs - AX Control, Inc.\" \/>\n<meta property=\"og:description\" content=\"Motors and drives can be damaged from heat, or from other problems like trapped moisture and dirt. We talk about the most common issues.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.axcontrol.com\/blog\/2020\/typical-repairs-on-motors-and-drives\/12\/11\/\" \/>\n<meta property=\"og:site_name\" content=\"AX Control, Inc.\" \/>\n<meta property=\"article:published_time\" content=\"2020-11-12T17:18:04+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-05-19T11:42:59+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.axcontrol.com\/blog\/wp-content\/uploads\/2021\/05\/pexels-rfstudio-3825584-731x1024.jpg\" \/>\n<meta name=\"author\" content=\"axcontrol\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"axcontrol\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.axcontrol.com\/blog\/2020\/typical-repairs-on-motors-and-drives\/12\/11\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.axcontrol.com\/blog\/2020\/typical-repairs-on-motors-and-drives\/12\/11\/\"},\"author\":{\"name\":\"axcontrol\",\"@id\":\"https:\/\/www.axcontrol.com\/blog\/#\/schema\/person\/b19681ba5b3316e7f3357bba95aa697a\"},\"headline\":\"Motors and Drives: Typical Repairs\",\"datePublished\":\"2020-11-12T17:18:04+00:00\",\"dateModified\":\"2021-05-19T11:42:59+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.axcontrol.com\/blog\/2020\/typical-repairs-on-motors-and-drives\/12\/11\/\"},\"wordCount\":1242,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.axcontrol.com\/blog\/#organization\"},\"keywords\":[\"ac drive repair\",\"dc drive repair\",\"industrial automation repair\",\"servo drive repair\",\"servo motor repair\",\"VFD drive repair\"],\"articleSection\":[\"Manufacturing\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.axcontrol.com\/blog\/2020\/typical-repairs-on-motors-and-drives\/12\/11\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.axcontrol.com\/blog\/2020\/typical-repairs-on-motors-and-drives\/12\/11\/\",\"url\":\"https:\/\/www.axcontrol.com\/blog\/2020\/typical-repairs-on-motors-and-drives\/12\/11\/\",\"name\":\"Motors and Drives: Typical Repairs - AX Control, Inc.\",\"isPartOf\":{\"@id\":\"https:\/\/www.axcontrol.com\/blog\/#website\"},\"datePublished\":\"2020-11-12T17:18:04+00:00\",\"dateModified\":\"2021-05-19T11:42:59+00:00\",\"description\":\"Motors and drives can be damaged from heat, or from other problems like trapped moisture and dirt. 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