It uses two dial indicators, one on each shaft, to measure the parallel and angular misalignment as shown in figure 21. Dial gauge alignment method pdf download linkmilcho. A practical guide to shaft alignment plant services. Many different variations of the rimface method are used, including straight edge and feeler gauge methods, single dial rimface, two dial rimface, trial and error.
The vblock mounting clamps are 78 wide and supplied with chain to accommodate shafts from. It can also be used to convert rotalign ultra is shaft alignment results into the commensurate dial gauge readings. True measurement dial reading x compensation value examples if a 0. While the dials may seem confusing at first, theyre easy to read once you understand what. The plunger is a spring loaded part that can be depressed into the case causing the dials needle to move clockwise. All our alignment systems allow to perform the alignment with two methods. Fast way to align machinery shafts vibralign is committed to helping businesses use their resources more efficiently and effectively. This is because in areas such as machine parts, an incorrect measurement by even a. The primary parts of a dial indicator are the face or dial, the case, and the plunger. Lovejoy does not sell laser alignment tools, but we do sell a dial indicator kit. In this method, enter the radius of the axial gauge from the shaft. Pdf a laser shaft alignment by ipspsds for rotary machine. Although it is not any more accurate, it is a much faster method of alignment. Apr, 2014 shaft alignment training with vibralign professional trainer stan riddle.
Benefits of laser alignment systems over dial indicators. The traditional precise shaft alignment method is dial. 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. Compensate for sag by dialing in the amount of indicator bar sag as a positive value at 12. For example, a machine running at 1800 rpm with 12 inch of spacer shaft length would allow a maximum offset of. The rim and face method can be used with the simplest of installations. They should be used only if no other tolerances are prescribed by existing inhouse standards. Its flexible components are intended to cater for different shaft dimensions and coupling configurations. Dial indicators are an essential tool for maintenance pros. The rim indicator is used to measure offset misalignment. Instruction manual thank you for purchasing the niigata seiki dial gauge.
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. Several equipment alignment methods, especially the reverse dial indicator method, which is the principle used in laser alignment is covered in explicit detail. Comparing parts to a master part during inspection. Dial gauge shaft alignment, electronic mechanical alignment. The procedure for doing reverse dial indicator alignment is not a difficult one. Shaft alignment industrial wiki odesie by tech transfer. Reverse dial indicator alignment procedure machines. Those who purchase new alignment instruments and hand them out to field technicians who lack the knowledge of alignment fundamentals are. To determine vertical offset misalignment, the rim indicator is set to zero at a vertical position. When using a rimface method, one measurement is taken on the rim of the coupling to determine shaft offset. The shaft alignment training course provides a highly practical knowledge of the use of dial gauge in coupling alignment. Sag does not effect the accuracy of horizontal rim readings. 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.
Dial indicators are measuring instruments that consist of a pointer on a dial that moves based on whatever the dial is measuring. Dec 22, 2014 while dial indicators offer an excellent shaft alignment solution for many applications, for those looking for a best in class solution, laser shaft alignment tools are available. Dial indicators are measuring devices designed expressly to measure relative position. The traditional precise shaft alignment method is dial indicator alignment piotrowski, 1995, and the two most popular methods are the rim and face method and the reverse. Rim dial indicator readings and offset misalignment the rim dial indicator is mounted perpendicular to the shafts with the plunger making radial contact on a coupling hub. Dial indicator series 2 standard one revolution type for errorfree reading unlike many other dial indicators, the onerevolution dial indicator literally shows the entire spindle travel or range as one sweep of the hand, eliminating the possibility of reading errors due to miscounting multiple revolutions. All measurements are taken on the rim of the coupling hubs. Clean the dial indicators measuring surfaces and stand, the granite plate, an d the gauge blocks to be used. Reverse indicator method alignment and couplings 3 the reverse indicator method is another shaft alignment method. Reverse dial indicator alignment procedure free download as pdf file. Plane a is the position of indicator tip at adjustable machine while plane s is at stationary machine. This video gives a brief overview of how dials can be used to measure shaft.
Another measurement is taken on the face of the coupling to determine shaft angularity. Vemc presents pump motor alignment process with help of dial gauge method for accurate and smooth functioning of machines in your manufacturing units. Pre alignment checks and corrections are performed to either improve machinery reliability or to facilitate the alignment process. The use of dial indicators for the vast majority of shaft alignment tasks where a flexible. Pruftechnik rotalign ultra is operating handbook pdf download. Standards and equipment used must have a valid calibration certificate.
There are two commonly use methods to align rotating machine shafts using dial indicators. Explain how the cross and reverse dial method is used to calculate misalignment. Rotate the couplings so that the dial indicator 1 is at the 12 oclock position and the dial indicator 2 is at the 6 oclock position. Jul 26, 2014 alignment procedure taking alignment readings step no. The plunger is a spring loaded part that can be depressed into the case causing the dial to move clockwise. In pursuit of that goal, vibralign invented its own method of correcting misalignment called vertizontal which allows for the vertical and horizontal adjustments to be made together in. Shaft aligning techniques shaft alignment by conventional method shaft alignment by dial test indicator dti shaft alignment by using laser equipment shaft alignment by using computer. Table of contents the importance of shaft alignment 1 shaft alignment. All types of machines having shafts as an integral part of their structure, experience problems related to shaft alignment. To read a dial indicator, start by mounting it on a stand to stabilize it and calibrating the dial by turning the outer face until the hand points to 0.
Explain how graphs are used in conjunction with the cross and reverse dial methods. For maintenance personnel in drinking water and wastewater. Alignment kits alignment accessory kit, alignment computer. It can measure errors and display resolution less than 2% 10 m 0.
The primary parts of a dial indicator are the face or dial, the case, and the. Rim dial indicator readings and offset misalignment. There are several steps which need to be taken for a successful alignment job. Step 4 precision alignment with a dial indicator youtube. Reverse indicator method 8 alignment and couplings figure 23. Shaft alignment training course ppt presentation and machine. Dial indicators often measure in small increments, so its important to know how to read them correctly. The other offset point is derived from the face dial indicator dif reading and the. Cross dial cross dial alignment is another method of achieving the same results as the rim and face method.
In this method two dial indicator rim and face dial are used to determine the relative position of movable shaft with respect to stationary shaft. Stan shows you how to perform an alignment in just one or two moves using dial indicators and the vertizontal compound. Shaft alignment is a method or procedure by which shafts of machines such as motors and turbines are connected to a generator or pump in proper alignment. One is the offset measured in the plane of the rim dial indicator dir. If necessary, the dial reading can be compensated for the actual. 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. Dial indicators can be used to check round parts like wheels for straightness and are commonly used in machine shops. Dial indicator alignment basics alignment knowledge. How to properly use the dial gauge to determine zposition. A major advantage of laser alignment tools is their accuracy. Make sure the probe of the dial indicators touch a smooth surface on the rim.
Oct 21, 2016 vemc presents pump motor alignment process with help of dial gauge method for accurate and smooth functioning of machines in your manufacturing units. The suggested tolerances shown on the following pages are general values based upon over 20 years of shaft alignment experience at. The goal of this method is to provide the technician with the recommended approach for the quickest way with quality alignment. In extreme cases the bending stresses applied to the shaft will cause the shaft to fracture and break.
The reason for this is that both angular and parallel misalignment can both be corrected for at the same time. Dial indicator calibration procedure memorial university. In either case, pre alignment is a very important phase of the alignment process. Thank you for shopping with mitchell instrument company 2875 scott st. Once the dial indicator is calibrated, press the spindle on the bottom. The rim dial indicator is used to measure offset in one plane along the shaft length and face dial indicator is used to measure angularity or slope between the shaft. Pump alignment report format free download as word doc. Pdf laseroptical alignment of shafts in rotating machinery is simple and more accurate. Shaft laser alignment 3 benefits over dial indicators. The alignment training is suitable for technicians undertaking machine alignment, coupling alignment, motor alignmnet, pump alignment, etc. Install coupling and check for rotational freedom of drive train if possible. Describe the cross and reverse dial alignment methods. Ritealign dial indicator alignment kit ritec alignment kit is a powerful tool to adjust shafts alignment using dial indicators accurately and easily. At this diameter the maximum allowable gap would be.
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