Intro: Bicycle Wheel Truing Stand With Digital Distance Senor
This Instructable should guide you though the building of a Non Welded Wheel Truing Stand.
This simple to use stand is constructed from standard Slotted Angle and Threaded Bar and can be adapted to fit a large verity of wheels.
I have included the tradition measuring instruments in the design as well as developing an Arduino laser distance senor to aid the process of truing your wheels.
I found the traditional measuring instruments apt at truing the wheel but the digital aspect of the design lacking the accuracy needed due to the sensors achievable tolerances.
There is some room for Improvement in the design and I welcome anybody helping build on and improve the design towards a fully automated system!
Step 1: Materials and Costs
1) 1½" Construction Angle 6'6" (2mtr) 40mm x 40mm slotted angle = (£8.70)
2) Corner Brackets SACPx8 - Pack of 8 Tension Plate = (£3.26)
3) M8 Threaded Rod Zinc-Plated Steel Studding - 8mm x 1m = (£4.00)
4) M8 Bolts, Nuts, Washers & Wing Nuts =
1) High Accuracy 0-10MM Precision Outer Measuring Metric = (£13.59)
Digital Measuring Instruments
!) POLOLU-2490 VL53L0X Time-of-Flight Distance Sensor Carrier with Voltage Reg /fba = (£12.68)
2) Arduino UNO A000066 ATMEGA328 Microcontroller Board = (£22.20)
3) Generic New 1602 LCD Board Keypad Shield Blue Backlight For Arduino = (£6.50)
The Materials & Costing section of this Instructable is a little detached from the actual design because I built the stand with materials I'd collected from leftovers from the construction job I work.
I will attach a CAD Schematic in the next section with a parts breakdown to aid your build
Step 2: CAD Design, Parts & Cutting List
Please find attached in this section the working drawings for the stand.
Use the PDF or Solidworks DXF to obtain the dimensions for cutting the slotted angle to length.
For cutting the Slotted Angle to size use a Hacksaw or Angle Grinder with metal cutting blade.
IMPORTANT (Cut the Slotted Angle on the half hole to allow the wheel to sit into the slots)
You can also view a 3D model and the parts on GrabCAD at (https://grabcad.com/library/diy-wheel-truing-stand...).
In the next section I will guide you though the build.
Step 4: Stand Base Assemble
Once The slotted angle is cut to size the project is just a case of assembling the parts.
The first step is to assemble the base as shown.
IMPORTANT (The CAD drawing uses wing nuts and washers as spacers).
Step 5: Upright Assemble
In this section you must first use the corner plates to attach the uprights.
Next add the bolts feet to the base.
After the frame is constructed use a wheel to check the dimensions.
Adjust the structure with a level and finally tighten the structure.
IMPORTANT (This process must be repeated every time a new wheel is trued)
Step 6: Adding the Measuring Equitment
The first step is to add the two long bolts which can be adjusted against the wheels deflection to aid truing.
The bolts can be solely used to help true the wheel, or you can add an instrument to visually read the deflection.
To do this
Create from the technical drawing the part that constrains the measuring gauge and attach it.
You can use washers or other spacers to obtain the correct distance for the gauge.
This should now allow you to true wheels to a fairly high degree. I also recommend you use in conjunction with a spoke tension gauge.
Step 7: Digital Distance Sensor
In this section ill wire the Adruino to an LCD and a LIDAR i2c laser distance sensor.
Step 1 is to solder the header pins onto the sensors circuit board.
Step 8: Wiring Schematic and Arduino Sketch
Using the attachments in this section you should be able to wire in and view the results.
Expect the results to be very jittery but I just thought I'd give it a try!