Special dial indicators series 2 optional accessories. The primary parts of a dial indicator are the face or dial, the case, and the plunger. Shaft alignment is the process of aligning two or more shafts with each other to within a tolerated margin. Now that we know that soft foot is bad, we will discuss how to measure and correct it. Shaft alignment by dial test indicator dti horizontal alignment parallel shaft alignment by dial test indicator dti vertical alignment angular pump motor the indicators are zeroed on the top and read at the bottom record the indicator reading and consider the sag compensation by subtracting it from the recorded reading move the motor to. Sometimes by using the feeler gages alignments are also carried out. This course begins with the fundamental principles behind shaft to shaft alignment and concludes with students conducting a series of alignment exercises using conventional alignment tools.
True measurement dial reading x compensation value examples if a 0. Shaft alignment report measurement program horizontal operator user measurement unit mils temperature 80. Vemc presents pump motor alignment process with help of dial gauge method for accurate and smooth functioning of machines in your manufacturing units. This module covers the basic principles of lasers, as well as laser alignment, laserdetector operation.
If the shaft is misaligned, you must realign the unit to prevent shaft breakage and damage to bearings, pump casing wearing rings, and throat bushings. Face dial indicator readings and angular misalignment. Take the reading at each quarter revolution of hub by rotating one end. Maximize the sweep distance of the face dial indicator for the geometry of the machine being aligned. When the outside diameters of the coupling flanges are not the same, use a scale on the surface of the larger flange, and then use a thickness gauge between the surface of the smaller flange and the edge of the scale. For maintenance personnel in drinking water and wastewater. The plunger is a spring loaded part that can be depressed into the case causing the dials needle to move clockwise. Precision shaft alignment using dial indicators abstract even with the advent of new computerized dial indicator and laser alignment systems, knowledge of the basics of shaft alignment is a must. Face dial indicator readings and angular misalignment the face dial indicator is mounted parallel to the shafts with the plunger making axial contact on a coupling hub. The exapproved xt550 system is developed for hazardous areas and is easily operated through our xt alignment app.
The plunger is a spring loaded part that can be depressed into. Its flexible components are intended to cater for different shaft dimensions and coupling configurations. Step 4 precision alignment with a dial indicator youtube. Z to the current z shown in the software and type it in as the new position. This paper is written by a laser alignment iconoclast. The shaft alignment training course provides a highly practical knowledge of the use of dial gauge in coupling alignment. A practical guide to shaft alignment plant services. The procedure for doing reverse dial indicator alignment is not a difficult one. When using our laser alignment systems you measure and align the two centers of rotation so the standard is different. Combo beltsheave red laser la12000r and reverse dial indicator system. The capital cost outlay for a laser system versus a set.
With a loadonpad design, figure 1 the shaft is free to laterally within bearing clearance, and alignment data is difficult to obtain without temporary bearing shims to stabilize the sham with a loadbetweenpad design, figure 1 b, the shaft remains stable during the alignment procedure. The measurements obtained should be very nearly the same. When using this form, you may find it convenient to use mils instead of thousandths of an inch. Alignment report hung seng huat engineering product co. Dial indicators are an essential tool for maintenance pros. For those currently using dial indicators without the budget to throw down on a laser alignment system, the free lovejoy dials app will help provide some of the automated calculation benefits of using laser tool. Aim indicator stem directly toward center line of shaft.
Shaft laser alignment 3 benefits over dial indicators. The skf tksa 11 is the first instrument on the market that uses inductive proximity sensors, enabling accurate and reliable shaft alignment to be affordable for every budget. The skf tksa 11 is the first instrument on the market that uses inductive proximity sensors, enabling accurate and reliable shaft alignment to. There are many reasons why dial indicators are a viable option to measure alignment. Dial gauge this can be metric or imperial and should have at least an inch 25mm of travel. Therefore, less accurate methods can be used at slower shaft speed. Standards and equipment used must have a valid calibration certificate. Clean the dial indicators measuring surfaces and stand, the granite plate, an d the gauge blocks to be used. With different types of fixtures extended across the coupling, the shafts are rotated to. The plunger is a spring loaded part that can be depressed into the case causing the dial to move clockwise. Page 93 this mode is used to convert dial gauge readings into rotalign ultra is shaft values, hence verifying calculations and comparing measurement results with those obtained using rotalign ultra is shaft. Even if you have a laser alignment system, it is a good idea to have a couple of dial indicators, a good feeler gauge and a micrometer in your alignment kit. The xt alignment app runs on most ios and android units, as well as our own display unit xt11. Ritec alignment kit is a powerful tool to adjust shafts alignment using dial indicators accurately and easily.
Clamp the dial indicator at one end and rest the plunger on face of the hub. Dial indicators are subject to rod sag, enough to throw off the measurement results. Machine alignment for maintenance personnel in drinking water and wastewater facilities. Under the indicator position mark the point that is half the indicator reading. The angular misalignment x is half the total indicated reading tir shown on dial gauge. An important understanding required is the confident use of dial gauges. It is an absolute requirement for machinery before the machinery is put in service. The procedure for using a thickness gauge to check alignments is similar to that for a scale. Dial indicator calibration procedure memorial university. Using your own dial indicators, dial indicator we use is a ls starrett, 81141j. Vibration wear energy usage proper alignment increases reliability. The intricate description explains the working of a dial gauge and gives an indepth understanding of taking and interpreting readings for dial gauge alignment. This allows the use of whole numbers and avoids confusing decimals.
Shaft alignment methods explained bright hub engineering. Using a square grid graph paper to illustrate the position. Calculate the vertical misalignment v m for each dial indicator using the following formulas. When using a reverse dial method, two measurements are taken on the rims of the couplings to determine shaft offset at two points. Dial indicator alignment procedure reliability direct. View the machine from the pump end, zero the indicators on the left, and then rotate and read on the right. If necessary, the dial reading can be compensated for the actual. I bought a cheepie and ground the shaft down to fit. Stan shows you how to perform an alignment in just one or two moves using dial indicators and the vertizontal compound move method.
Step 4 precision alignment with a dial indicator duration. It is not intended as a comprehensive guide to alignment of process machinery, nor is it a substitute for seeking professional advice or reference to the manufacturers of the machinery. Simple and more accurate method is use of dial gages. Always check the shaft alignment with all the piping in place. To calculate the amount of shim to add to com pensate for the short foot, the sum of the smaller. With feeler gauge find obvious gaps and fill them with shims, taking care of any rough soft foot condition. Notice the minus sign in the calculation of the vm, indicator 1. Reverse alignment annotated instructors guide module. This video gives a brief overview of how dials can be used to measure shaft alignment, and can ev. Jun 26, 2014 dial indicators are subject to rod sag, enough to throw off the measurement results. If they are not, shim or move the motor as necessary to satisfy the tolerance stated in your instruction manual for angular alignment. Bring a wire brush for cleaning shims and baseplates.
Dial indicator alignment basics alignment knowledge. Alignment of the shaft is necessary when the motor or driven machinery is new or when it is dismantled due to improper running. When a driver like an electric motor or a turbine is coupled to a pump, generator, or any other piece of equipment, it is essential that the shafts of the two pieces are aligned. The face indicator is used to measure coupling gap differences. It is not intended as a comprehensive guide to alignment of process machinery, nor is it a substitute for seeking professional advice or. Alignment kits alignment accessory kit, alignment computer. Dial gauge alignment procedure in covered with detailed animation. Those who purchase new alignment instruments and hand them out to field technicians who lack the knowledge of alignment fundamentals are often. Fixturlaser alignment systems calculate the angularity and offset between the two centers of rotation. To measure vertical misalignment, perform the following steps.
Prepare a ring gauge to use as a reference standard for setting the zeropoint. Alignment is important, but we can get away with the least accurate method. At this diameter the maximum allowable gap would be. When you install or assemble pumps driven by electric motors, make sure the unit is aligned properly.
It is an advanced measurement system for alignment of horizontal and verticalflange mounted rotating machinery. A detailed coverage on this topic is provided using dial gauge animation with step by step procedure. For those not doing shaft alignment at all, for the longevity and reliability of your equipment, we highly recommend that you start now. Measure shaft and coupling runout, using a dial indicator. If there is a difference from end to end, make it equal by shims. Dec 22, 2014 for those currently using dial indicators without the budget to throw down on a laser alignment system, the free lovejoy dials app will help provide some of the automated calculation benefits of using laser tool. Used with a magnetic base or indicator stand, this gauge will show the difference in position from a zero point set at a reference position. Aim to have all soft foot readings within 2 mils thou. Figure 46 shows the calculation using the cross dial alignment form. Shaft alignment industrial wiki odesie by tech transfer. Vemc presents pump motor alignment process with help of dial gauge method for accurate and smooth functioning of machines in your. A typical pump in an hvac application requires a fourpole motor 1,750 to 1,800 rpm, depending on slip. Then, check the height of pump shaft with the height gauge. Comparing parts to a master part during inspection.
The dial indicator case, stem, spindle, and contact point are to be examined forburrs andsharpedges. Instruction manual thank you for purchasing the niigata seiki dial gauge. An ebook reader can be a software application for use on a computer such as microsofts free reader application, or a booksized computer that is used solely as a reading device such as nuvomedias rocket ebook. Rod sag is one of the reasons you may observe differences between dial indicator readings and laser reading.
How to properly use the dial gauge to determine zposition. Xt550 intrinsically safe laser shaft alignment, exatex. The horizontal move is the part of the alignment process that aligns the shafts centerlines from side to side. This is the maximum distance, and at this point the dial indicator will read the minimum value.
In cross section perpendicular to the axis of the ring gauge, position the gauge along diameter. Dial indicators are measuring devices designed expressly to measure relative position. With spacer type couplings, a dial indicator should be used to obtain these readings. With the help of dial, mounted on a vertical stand generally refered as height gauge pick up the height of axis line of the motor. To determine vertical coupling gap difference, the face indicator is set to zero at a vertical position 12.
If the face dial contacts the coupling face directly, ensure the plunger of indicator contacts the coupling near its outer edge. Jul 26, 2014 ebook is an electronic version of a traditional print book that can be read by using a personal computer or by using an ebook reader. Care has been taken by the authors, pruftechnik ltd, in the preparation of this publication. Several equipment alignment methods, especially the reverse dial indicator method, which is the principle used in laser alignment is covered in explicit detail. Thank you for shopping with mitchell instrument company 2875 scott st. Ensure fixtures are mounted at a position where rotation is possible. Set the injection pump timing contributed by vince waldon wednesday, 01 october 2008. However, those are not allowed in potentially explosive areas, but makes for a perfect complement for use in other places.