[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-399390-105":59,"doc-detail-399390-en":131},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":124,"head_meta":126,"extra_data":128,"updated_unix":130},105,"en","tachometer-selection-guide-tach-feedback-and-dc-tach-specifications","Tachometer Selection Guide - Tach Feedback and DC Tach Specifications","","Baldor Electric describes industrial tachometers for DC, AC, and digital output, used to provide precise motor speed and position feedback. The brochure explains why tach feedback improves drive regulation under changing speed and load, comparing armature-feedback-only accuracy with tachometer feedback performance. It includes application guidance for wiring, coupling, and enclosure suitability, plus catalog-based selection tables listing key electrical and mechanical specifications such as mounting, RPM limits, ripple, reversing error, temperature, and materials.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/tachometer-selection-guide-tach-feedback-and-dc-tach-specifications/399390/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/tachometer-selection-guide-tach-feedback-and-dc-tach-specifications/399390.png","ImageObject",300,407,{"name":92,"@type":93},"AfterMidnight","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-22","2026-09-27",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",12,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"Why is tach feedback used in motor drive regulation?","Question",{"text":113,"@type":114},"Tach feedback improves the drive’s regulation when speed and load vary. With tachometer feedback, regulation can be reduced to about 1% of set speed compared with 1% of base speed for SCR drives using armature feedback.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"Which DC tachometers are recommended for basic SCR motor feedback?",{"text":118,"@type":114},"For basic motor feedback to an SCR motor control, the brochure highlights the PTG50XP or PTG50XPS. These are rated 50 VDC/1000 RPM and can use tach adapters for compatibility across Baldor’s DC motor line.",{"name":120,"@type":111,"acceptedAnswer":121},"What installation practices does the brochure recommend for best tach performance?",{"text":122,"@type":114},"It recommends an anti-backlash type tach coupling and using shielded lead wire with the shield grounded only at the control. Tach leads should be routed in separate conduit from motor power leads.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},399390,1790744398,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":105,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":41},962090896061,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","Baldor Electric manufactures a wide variety of tachometers with DC, AC, and digital output. Tachs are available from basic low-cost speed indication to an encoder-based digital tach designed for use with the latest speed and position controls.  \n“Just close enough” isn’t adequate anymore! An increasing number of applications require feedback to indicate exactly how fast a motor is running. Accurate process control is possible by using one of Baldor’s industrial tachometer designs.  \nBaldor tachometers are used in elevators, plastic extruders, printing presses, antenna drives, and many other diverse applications.  \nTachs listed in this brochure with a catalog number are available from stock, or let Baldor design and manufacture a customized tach to your specifications.  \nWhy Use Tach Feedback?  \nThe purpose of tach feedback is to improve the drive’s regulation under varying speed and load conditions. Most SCR motor drives have a regulation spec of 1% of base speed with armature feedback. By adding a tachometer for feedback, regulation becomes 1% of set speed.  \n\n| Comparison of an 1800 RPM DC Motor Operated from an SCR Control |  |  |  |\n| --- | --- | --- | --- |\n| Armature Feedback (No tach) Regulation-1% of Base Speed |  | Tachometer Feedback\u003Cbr>Regulation-1% of Set Speed |  |\n| Set Speed\u003Cbr>1800\u003Cbr>1000\u003Cbr>500\u003Cbr>50 | Variation\u003Cbr>±18 RPM\u003Cbr>±18 RPM\u003Cbr>±18 RPM\u003Cbr>±18 RPM | Set Speed\u003Cbr>1800\u003Cbr>1000\u003Cbr>500\u003Cbr>50 | Variation\u003Cbr>±18 RPM\u003Cbr>±10 RPM\u003Cbr>±5 RPM\u003Cbr>±0.5 RPM |\n\nWhich tach should I specify?  \nFor basic motor feedback to an SCR motor control, our most popular DC tach is either the PTG50XP or  \nPTG50XPS. This tach is rated at 50 VDC/1000 RPM. Tach adapters are available for these tachs allowing use on most of Baldor’s DC motor line. Their industry-standard PY mounting flange makes them interchangeable with many other tachometers. Baldor’s new 60V DC metric tach matches the mounting and electrical specs of popular models from Europe. These tachs are available in the standard TENV enclosure or a Washdown IP65 enclosure, from stock. Baldor does not offer an Explosion Proof tach for hazardous locations.  \nFor best performance, the tach coupling should be an anti-backlash type. Shielded lead wire should be used with the shield, grounded only at the control (not at both ends) . Tach leads should be in separate conduit from motor power leads.  \n2  \nTachometer Selection Guide  \n\n| Catalog\u003Cbr>Number | Baldor\u003Cbr>Tach\u003Cbr>Type | Output\u003Cbr>Volt.\u003Cbr>V/1000\u003Cbr>RPM | Ripple\u003Cbr>Max.\u003Cbr>Speed | Max.\u003Cbr>RMS\u003Cbr>Ripple | Temp.\u003Cbr>Max.\u003Cbr>Current | Reversing\u003Cbr>Error | Cycles\u003Cbr>Per\u003Cbr>Rev. | Amb.\u003Cbr>Temp\u003Cbr>°C | Approx.\u003Cbr>Coefficient\u003Cbr>%Volt/°C | Temp.\u003Cbr>Compen. | Enclos. | Housing\u003Cbr>Material | Weight\u003Cbr>Lbs. | Inertia\u003Cbr>(lb-in2) |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n| PTG50XP\u003Cbr>PTG100XP | XPY | 50\u003Cbr>100\u003Cbr>200 | 5000\u003Cbr>2500\u003Cbr>1250 | 0.5% | 400 mA\u003Cbr>200 mA | 2% | 52 | 40 | 0.022 | No | TENV\u003Cbr>IP54 | Aluminum\u003Cbr>& Steel | 5 | 0.93 |\n| PTG50XPS\u003Cbr>PTG60XPS-M\u003Cbr>PTG100XPS | XPY-II | 50\u003Cbr>60\u003Cbr>100 | 5000\u003Cbr>4166\u003Cbr>2500 | 0.35 | 100 mA\u003Cbr>50 mA\u003Cbr>50 mA | 1% | 33 | 65 | 0.045 | No | TENV\u003Cbr>IP54 | Cast Iron | 19 | 0.54 |\n| PTGWD50XPS\u003Cbr>PTGWD100XPS | XPY-II | 50\u003Cbr>100 | 5000\u003Cbr>2500 | 0.35 | 100 mA\u003Cbr>50 mA | 1% | 33 | 65 | 0.045 | No | TENV\u003Cbr>IP65 | Cast Iron | 19 | 0.54 |\n| PFTG4250XC\u003Cbr>PTFG42100X | XC42 | 50\u003Cbr>100\u003Cbr>200 | 5000\u003Cbr>2500\u003Cbr>1250 | 0.5% | 1.0 A\u003Cbr>0.5 A | 2% | 48 | 65 | 0.012 | Yes | TENV\u003Cbr>IP54 | Cast Iron\u003Cbr>& Steel | 25 | 6.47 |\n| PFTG4650XC\u003Cbr>PFTG46100X | XC46 | 50\u003Cbr>100\u003Cbr>200 | 5000\u003Cbr>2500\u003Cbr>1250 | 0.5% | 2.0 A\u003Cbr>1.0 A | 2% | 48 | 65 | 0.012 | Yes | TENV\u003Cbr>IP54 | Cast Iron\u003Cbr>& Steel | 35 | 9.90 |\n| BTG1000 | 30-AFL-0 | 50 | 5000 | 8.0% |  | 2% | 24 | 40 | 0.2 | Yes | TENV\u003Cbr>IP54 | Aluminum | 6 |  |\n| PTG1024LD | DPY | 240 PPR\u003Cbr>500 PPR\u003Cbr>1000 PPR\u003Cbr>1024 PPR | 5000\u003Cbr>5000\u003Cbr>5000\u003Cbr>5000 |  |  |  |  |  |  |  | TENV\u003Cbr>IP54 | Aluminum | 1 ","cbCaipGKLaNlCUQi","https://ap.wps.com/l/cbCaipGKLaNlCUQi","pdf",644574,"English","# Why Use Tach Feedback?\n## Tach Feedback for Accurate Regulation\n# Which Tach Should I Specify?\n## Recommended Adapters and Mounting\n## Installation and Wiring Guidance\n# Tachometer Selection Guide\n## Catalog Number Specifications Table\n# XPY DC Tachometer Generator\n## Chart and Features","[{\"question\":\"Why is tach feedback used in motor drive regulation?\",\"answer\":\"Tach feedback improves the drive’s regulation when speed and load vary. With tachometer feedback, regulation can be reduced to about 1% of set speed compared with 1% of base speed for SCR drives using armature feedback.\"},{\"question\":\"Which DC tachometers are recommended for basic SCR motor feedback?\",\"answer\":\"For basic motor feedback to an SCR motor control, the brochure highlights the PTG50XP or PTG50XPS. These are rated 50 VDC/1000 RPM and can use tach adapters for compatibility across Baldor’s DC motor line.\"},{\"question\":\"What installation practices does the brochure recommend for best tach performance?\",\"answer\":\"It recommends an anti-backlash type tach coupling and using shielded lead wire with the shield grounded only at the control. Tach leads should be routed in separate conduit from motor power leads.\"}]","Tachometer Selection Guide - Tach Feedback and DC Tach Specifications | PDF",1790496656]