Turbomachinery Balancing Machine-Measuring Angle of Roating Shaft

Hi, I need help on the subject. We have a very old turbomachienery balancing machine, their is a round graduated strip on a machine which shows the angle. I need suggestions from the forum members how and what devices i required to display the angle of the shaft.

Example: 1- Shaft is stopped and its angle is set to ZERO. 2- Now shaft is rotated at about 1500 RPM and the machine is stopped. The machine tell us unbalance weight and the angle on an Analog dial. 3- Currently, we manually rotate the shaft and stop it at that angle using graduated strip. 4- Is it possible i have an LCD display that shows me exact angle +-1 degree.

I have little experience in Arduino Programming. LCD and Arduino is available. Do i need encoder? Anybody point me to the direction.

I can explain much better if above is not understandable. Regards

If you can get a suitable encoder connected to the shaft you can display the current angle (to the resolution of the encoder, which may not be +/- 1 degree). How is this any better than reading the position off a mechanical display?

I can see the point if the Arduino is also controlling the motor and moving the shaft to the correct position for you, but then that entails the Arduino working out what the required position is, which probably means interfacing with your balance machine, which is a whole other problem.

Thank you Peter for your words on the subject. What type of encoder i should use Absolute or Differential?... I have seen the encoder usage with the Arduino but never see any sketch which convert the count into Angle. I want it to show me 360 degree angle. I have 2000PPR encoder available and i will check what can i do with it..

Balancing Machine Specially for Turbocharger |500x358 1.Widely used in balancing turbocharger, turbocharger impellers,turbocharger compressors ,turbocharger turbines etc . 2.Auto-positioning bed,17inch LCD screen,large tool carriage structure 3.Dedicated bracket,driven by Nylon belt ,variable speed motor 230W

Balancing Machine Specially for Turbocharger

Technical data at a glance PHZY-1.6 PHZY-5 PHZY-16 Max Mass of Workpiece (kg) 1.6 5 16 Max Diameter of Workpiece (mm) Φ300 Φ300 Φ300 Distance between Two Support Bearings (mm) 60~400 60~400 60~400 Journal Diameter Scope of Workpiece (mm) Φ5~40 Φ5~40 Φ5~40 Diameter Scope of Driving Belt (mm) Φ15~150 Φ15~150 Φ15~150 Rotational Speed when the Diameter of Driving Belt is100mm(r/min) 570,12001) 570,12001) 570,12001) Motor Power (kw) 0.23DC 0.23DC 0.23DC Min Achievable Residual Unbalance Amount (emar) ≤0.3g· mm/kg ≤0.3g· mm/kg ≤0.3g· mm/kg

Shanghai Jianping Dynamic Balancing Machine Manufacturing Co., Ltd Add:NO.2151, Panchuan Road, Baoshan Industrial Park, Shanghai, China Tel:+86-21-39972151 Fax:+86-21-39972969 E-mail: jp004@jp-balancer.com WhatsApp: +86-13817256095 Skype: shjpphj Web:www.jp-balancer.com

Your 2000 ppr should be ok as it can give you a resolution of 0.18 deg. I would have thought absolute position encode is necessary as you are looking for an absolute position.

I too cant see the point in all the effort to simply replace an analogue gauge with a digital unless you are linking the reading to some other equipment.