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Picture of Updated Bicycle mounted steadicam
This instructables project details the latest version of the bicycle mounted steadicam arm (constructed from hardware store and hobby shop parts) for a miniDV camera. I've used the video that I've captured to create DVDs for: a bicycle shop and for myself (as motivation for my indoor biking). The original article is titled: DIY: Bicycle - Steady Cam - mount
 
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Step 1: Picking up where I left off...

Picture of Picking up where I left off...
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The last version of the steadicam arm (from the previous project) looked like the image you see below. This version had two iso-elastic arms operating in different directions. One for up and down movement and the other one for side to side movement. However the need for the side to side arm wasn't as bad as the need for additional compensation in the up and down direction. In the new version I rotated the arm (shown directly under the camera) such that it provides isolation in the same direction as the first section (see second picture in this step).

Step 2: Other Changes

Picture of Other Changes
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Originally the assembly was mounted to the handlebars (see image), but there was a problem, I couldn't clamp it tight enough to prevent the arm assembly from rotating downward on the handlebar. So, I change the mounting bracket to clamp around the stem. This was done by rotating the L-angle bracket on the PVC assembly by 90 degrees and re-designing the clamp (see notes in the photo) as well as the drawing.


Step 3: Updated parts list and tools

Picture of Updated parts list and tools
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Most of the parts are available at a well stocked hardware store. The majority of them came from one of the following: The Home Depot, Ace Hardware or Blain's Farm & Fleet. The Hardware store parts totaled ~$40.00.

In this version I did add a professional tripod head as well as a set of RC shock absorbers, which added ~$35.00 to the total.

QTY - Description

Hardware Store List
8 - Stanley Strap hinges (this brand has plastic bushing that keep the hinge from wobbling)
1 - PKG Clear Bumpers
1 - PVC "T" - 1-5/16" Inside Dia.
1 - PVC "reducer" fitting 1-5/16" to 1"
2 - 4" x 4" "L" angle bracket
1 - EXT Spring 1/4"
1 - EXT Spring 3/8"
1 - 1-1/2" Dia. Hose Clamps
1 - PKG(2) Rubber Washers
2 - PKG(10) 1/4"-20 nuts
1 - PKG(4) 1/4"-20 lock nuts
1 - PKG(20) 1/4" lock washers
1 - PKG(10) 1/4" brass flat washers
1 - PKG(4) 1/4" flat (fender) washer O.D. 1"
2 - PKG(4) 1/4" Bolts (1/4" - 20 x 1")
2 - PKG(4) 1/4" - 20 x 3/4" countersunk bolts
1 - PKG(4) 1/4" - 20 x 1-1/2" machine bolt with flat allen head
1 - PKG(5) 10 - 32 x 1/2" machine bolts and nuts
1 - PKG(10) #10 lock washers
1 - PKG(10) #10 x 1/2" wood screws
2 - 10-32 FN Allen head cap screws
2 - 6MM right angle grease zerks
2 - 6MM nuts
1 - PKG screen door (plastic parts)
Misc Pipe fittings to use as counter weight (may not be needed if spring tension is correct for the weight of the assembly and camera).

Hobby Shop List
1 - pkg of 2 Radio Controlled Car Shock Absorbers
(Any brand should do as long as they'll provide a way to easily attach to the hinges)

Camera Store List
1 - Basic tripod head - your preference here, should be light weight)

As for tools, you'll need;
3/8" Electric Drill
Drill bits - 3/8", 1/4", 5/32", and 3/32"
Hammer
Center punch
Pliers
file
Hacksaw
4" Bench Vise
Assorted wrenches, 3/8" socket set and ratchet or adjustable wrenches.
A small "bubble" type level
a ruler (I used a small metal rule)

Step 4: Getting Re-started

First we'll lay out the 4 major sections of the steadicam arm.

1) The stem mount; all the PVC parts, the 2" x 2" L-angle brkt, 1 - 1/4"-20 x 1-1/2" bolt, 2 - 1/4" x 1" fender washers, 1 - rubber washer, 2 - #10 x 1/2" wood screws, 1/4" lock washer, 1/4" nut and hose clamp.

2) The 2 spring arms; 8 - strap hinges, 6 - 1/4"-20 x 3/4" counter sunk bolts, 8 - 1/4"-20-1" bolts, 14 - 1/4" lock washers, 14 - 1/4" nuts, 4 - 1/4" brass flat washers, 2 - 10 x 32 bolts, locks washers, nuts, clear bumper and springs)

3) The tripod head mount; 2" x 2" L-angle bracket, 2 - 1/4"-20 nuts, 2 - 1/4"-20 lock nuts, and the tripod head.

4) RC Shock Absorbers, 2 - grease zerks, 2 - 10-32 Allen head cap screws, 2 - 6-32 screws and 2 plastic bushings from the screen door parts pkg.

Step 5: Stem mount

Picture of Stem mount
1) Start by cutting the PVC "T" joint lengthwise through the middle (See the detailed diagram with the "cut line")

2) Place the PVC reducer fitting into the top of the T as tightly as you can.

3) Pre-drill two 3/32" holes through the T and adapter for the two screws and install the two screws.

4) Next place the 1/4" bolt through the L-angle bracket, rubber washer and through the neck of the T. This is to check the length of the bolt as it will need to be cut. See the notes in the diagram.

5) Once the bolt is cut to length, assemble the parts as follows (per the diagram).

6) First the bolt goes through the L-angle bracket, then the rubber washer and through the top of the PVC "T" and reducer.

7) Now from the bottom insert two (2) 1/4" x 1" fender washers against the lip of the reducer fitting and push the bolt through.

8) Now you can place the lock washer over the end of the bolt and start threading the 1/4" nut.

9) Tighten the nut and bolt until the bracket is snug against the PVC fitting.

10) Drill several small holes in the side of the upper section of the PVC just below the bottom of the 1/4" - 20 nut (see diagram).

11) Use a small file or hack saw blade to form a slot that will allow the hose clamp to pass through the PVC (just under the 1/4" nut).

12) Pass the hose clamp through the slots formed in the previous step and then set this part of the assembly aside until the final assembly.

Step 6: The iso-elastic arm

Picture of The iso-elastic arm
The arm mechanism is constructed from the eight (8) strap hinges. Each arm assembly is a set of four(4) hinges that form a basic parallelogram. The color diagram below shows the placement of the hinges.

Red hinges 1 & 2 - this is the outside end; #1 attaches to the stem mounted angle bracket and #2 attaches to Green #1
Green hinges 1 & 2 - outside end; of which #1 attaches to Red #2 and Green #2 will attach to the tripod mounting bracket.
The Light blue 1 & 2 upper hinges and the Dark blue 1 & 2 lower hinges (inner hinges) attached to the outer ones, which complete the parallelogram.

1) Use a hacksaw to cut one end of four (two per set) of the hinges (inner ones) to ~1-1/8" in length.

2) Once that's complete the short ends will be connected to the two outer hinges with brass washers separating the hinge straps (see notes in the picture). I used the countersunk bolts for this step as it helped to self center the bolts and prevented bolt heads from colliding when the arm moves through it's entire range of motion. Once this is done you should have two sets of hinges joined; the light blue and green pair and the dark blue and red hinge pair.

3) Next align one set (either the upper or lower hinges) of the long hinge straps (inner and outer) and secure with the short 1/4" bolts and nuts.

4) Now if you fold the straps around to form the rectangle you will notice the holes don't line up, because it's offset in the wrong direction for these hinges. But there's plenty of room to drill the required 2 hole, just mark and drill them out with a 1/4" drill bit. Then fold them back around and secure them as you did with the other straps.

5) Use the 10 - 32 x 1/2" bolts as the retainers for the ends of the springs (see picture) one of the bolts is in the upper left corner (here I used the existing 1/4" hole in the hinge strap). The other one is in the lower right corner (for this one I drilled a 5/32" hole, close to the hinge joint, to get the necessary spring tension). For now, just use a temporary spring or you can skip that step for now, until you put it all together.

6) For an initial calibration/alignment check, measure the distance (on both sides) between the center of the hinge pivot points. The distance between light blue and green hinges should equal the distance between the red and blue hinges. Likewise the distance between light blue and red hinges should equal the distance between the dark blue and green hinges. To adjust these distances just loosen the appropriate bolts and move the hinges and re-tighten, till the distances are correct.

Step 7: Tripod head mount

Picture of Tripod head mount
The attachment of the tripod head is pretty straight forward.

1) Drill two 1/4" holes in one side of the angle bracket to match the ones in the hinge bracket.

2) Drill one 1/4" hole in the other side to match the one on the tripod head.

NOTE: I had to attached a counter-weight on the camera end of the mount (using a couple of pipe fitting parts (an end cap and a reducer), but this will depend on how closely you match the spring tension to offset the weight. To attach the counter weight I drilled a 1/4" hole in the end cap fitting and attached it with a slightly longer hinge bolt.

Step 8: Adding shock absorbers

Picture of Adding shock absorbers
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This step required some drilling and tapping to allow both ends of the shock absorbers to be anchored to the existing steadicam arm assembly.

1) I drilled two #36 holes, one in each of the two hinge arm sections (see pictures).

2) Next, tap the holes for a 6-32 thread

3) Use one of the 6-32 x 1/2" screws and one of the plastic (screen door bushings) to secure one end of the shock absorber (see drawing of the shock absorber assembly).

I used two right angle grease zerks too mount the other end of the shock.

1) Remove (unscrew) the part of the zerk that extended at the right angle from the two grease zerks.

2) Then drilled all the way through the head of the zerk ,where the right angle fitting was removed with a #21 drill bit.

3) Next tap the holes for the10-32 allen screws.

4) Then for each shock, pass the 10-32 Cap screw through the other end of the shock absorber and then then secure it into the threaded zerk.

5) The zerks can then be secures to the hinges through one of the spare holes in the hinges with the threaded base of the zerk and a #6MM nut.

Step 9: Putting it all together

Picture of Putting it all together
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Now we bring it all together, the arm assembly gets attached to the stem mount bracket with 2 - 1/4" x 1" bolts. I had to drill two holes in the L-angle bracket to match the holes in the hinge strap (see the picture). Two 1/4" bolts goes through the two hinge straps and a 1/4" holes drilled in the L-angle bracket on the stem mount. The tripod L-angle bracket gets attached to the other end of the arm assembly.

You'll need to check two basic functions of the spring arms;
1) Keep the camera in a neutral (balanced) position.
2) Make sure that as the tripod head moves up and down, it keeps the the camera level.

--Balancing procedure--

Place your camera in the tripod head and secure it. Now you may need to try several different springs or combinations of springs, as I did, to "equalize" the weight. Ideally it will require the same "pressure applied" to move the camera up or down when it is in the middle of the range of motion. I secured the ends of the springs with some brass washers and the #10-32 nuts and bolts.

--Level checking procedure--

To check the "level" of the arm place the entire assembly in a vise or mount it on your bike. Then put the small "bubble" level in the tripod in place of the camera and move the arm to the extreme top position. Now check the position of the bubble. NOTE: you may want to tweak the position of the assembly in the vise or on the bike to center the bubble and then re-tighten the clamp or the vise. Now move the arm to the extreme bottom of the range of motion and compare the bubble position. If it's off by more than a small amount, then you'll want check the measurements of the parallelogram (hinge corners) and re-align if necessary (see step 6).

Once you're satisfied with both of these requirements, you're ready for a road test, place the camera (mine is a JVC Mini DV GR-D250) in the tripod. Place the PVC "T" halves around your stem and use the hose clamp to secure the assembly. One note here, you may have to remove a little bit of additional material on one of the two halves, in order for it to clamp tightly enough.

Step 10: Road test

Here's a short clip of video from a weekend ride where i used the Steadicam mount. The new design seems to have made a big difference for the basic road conditions.


Light_Lab3 years ago
I noticed your video stopped fairly violently when you got to the railway crossing; that was the bit I wanted to see. Can I assume that despite the elaboration the mount is really only working on 'glass' smooth roads?
If so I can certainly sympathize, I am on about design Mk8 for videoing from my Van. I even have an anti-vibration plate I imported and I still get visible bumping from railway crossings and even a lot less.
I have tried virtually every simple design I can find on the net and nothing seems to make the grade for even ordinary road surfaces here in Oz. I should explain Oz. has a lot of clay and as a result the roads generally aren't autobahn smooth.
When (if) I get something that works I will post it on Instructables. I am going to try a design this morning the way to work. 

fireballxl5 (author)  Light_Lab3 years ago
Actually it had less to do with the bump of the railroad track than it did with showing us blowing thru the stop sign. The camera that I was using at the time was a Mini-DV tape unit that suffered from some video tearing when going over severe bumps even with the elaborate steadicam arm. The arm does a lot to reduce the moderate vibration on the chip and seal roads, and even small cracks, but railroad tracks and potholes were another matter. Good luck with your system. If I even get a new camera (using memory cards vs tape) I'm thinking there would be a big improvement or the older tape based recorder.
You should try attaching it to the body of the bike. It looks like when the handlebars get turned, the steadycam turns pretty sharply.

Otherwise, the footage looks amazing. Nice instructable.
good stuff sir!
Truehart4 years ago
How sturdy are your shock absorbers? What are they made out of? Could two of them hold up a person? How much pressure can they hold?
Papa G7 years ago
This is great. I can see huge improvements over the last version. I would love to see footage of this mounted on the frame rather than the handle bar. I think that'll make it near perfect as the handle bar wiggles a lot to keep the balance of the bicycle.
I'm using a digi stills camera, which shoots 1024/768 movies, fixed to a front mounted bag on a Brompton folding bike. I have no damping and it's not good on rough surfaces, but there is an advantage, as the bag it's fixed to is on the frame and not the handlebar. If you search dewexdewex berlin on youtube, you'll find an example of it in use. I'd like to build some simple steadying device as well, and I was thinking of incorporating the simple pendulum type steadicam with the central pivot constrained to limit yaw (vertical axis) and parrtially constrained with rubber to limit pitch (horiz left to right axis), so the cam would always shoot level,. I'm thinking that the joint could be inside a vertical helical spring running in a circumferentially tightenable shroud for damping with friction.
fireballxl5 (author)  dewexdewex5 years ago
You might want to take a look at the first version of this project; http://www.instructables.com/id/DIY%3a-Bicycle---Steady-Cam---mount/
I had initially tried a pivot/pendulum mounting, but had issues explained in the later steps of the projects. Good luck with your project.
Hey,

I had a look at your pendulum version, and, as I understand it, you were just letting the camera be a pendulum weight swinging from a pivot with no counterbalance. I think this would have worked better if you'd have tried the following:

Put the camera at the top of a vertical beam, put a counter weight at the bottom of the beam, make a pivot somewhere in the middle of the beam with an axis parallel to the camera shooting axis, and set up the balance between the weight and the camera, so the weight provides a marginally greater moment than the camera.

This is basically how the steadicam junior devices work, except they have a ball joint instead of a single axis one.

I'm guessing the main vibration problem with the mount is going to be along the vertical axis, and the others won't contribute much to the problem. I might test this thinking with an iphone or ipod touch strapped to my bike, as they have 3 axis live plots from the accelerometer to watch as I ride.

Basically, what I'm going to do with my scratchy thinking is build a mount like your first one with a damped/sprung unit (either like yours, or a more basic vertically mounted spring damper from an RC truck), and fix a counterballanced pendulum to this, which allows the camera to come to equilibrium pointing forward and level.

Let me know if you think this sounds more reasonable than my first ramblings.

Dave.
genenewyork5 years ago
Is there a newer version that you made? This is a really nice idea.. I am dying to see more footage or try making this device myself. But I have problems with patience though. Can you email me please. genenazarov@gmail.com
fireballxl5 (author)  genenewyork5 years ago
This is the latest version, I have really changed the design since posting this update. I do have other footage, just not anything I've posted. I've used some of it to make a DVD that I play while cycling indoors on my trainer. It helps get thru those boring rainy days or winter training days.
harigast6 years ago
duuuuuude. i will combine this steadycam with this http://www.yb2normal.com/DIYsteadicam.html and then it will be even closer to the real thing! i was looking at pics of real steadycams so i could try to replicate it. then i found your instructible. thank you!
jasdipBOY6 years ago
I'm about ready to embark on building your version 2. A few questions: - Where do I get the shock abosorbers. I don't see those in your parts list. - Do you have any recent upgrades or new discoveries to pass on? I'm going to use it on my mountain bike and possibly in my minivan dash. Thanks so much for this awesome project!
fireballxl5 (author)  jasdipBOY6 years ago
You should be able to get the the RC shock absorbers from any well stocked Hobby Shop that carries Radio Controlled cars. I just updated the parts list, but I didn't have a brand or model for the shock absorbers. As far as the pulley design, I abandoned that early on in the first prototype, so the only images are in that posting; http://www.instructables.com/id/DIY%3a-Bicycle---Steady-Cam---mount/
conradjacob7 years ago
The use of strap hinges is absolutely brilliant. I built one section and it worked great on / in cars. I used a bungy cord through double pulleys instead of a spring. My theory is that it is important to balance the rig as close to horizontal as possible and the bungy is easily adjusted. The doubling was so the bungy isn't near it's limit, maximizing float. On a bike I found lateral vibration/movement is still a problem. I am going to try simply hinging the rig so it can swing a bit side to side (going to be hard to control). I didn't use Stanley hinges - this could be exaggerating my issues.
Do you think you could post some images of your bungy/pully design? I'm about ready to build this and wandering if I should go your route. Thanks!
I am away from my stead-thing and will be for a month. I'll post then. I did add a second hinged arm for side to side float. Made it all pretty ungainly and only able to balance an HV20 weight camera. Even though it has been a year, I haven't tried it on a bike yet.
zzpza6 years ago
very impressive work :D
flee20107 years ago
Yes much better bump absorption. Looking for something like this to be used on bikes and in car setups. Nice.
theking8 years ago
iloveyourvids
laernmoer8 years ago
This version looks better than the previous version. I do see a lot of horizontal shake produced when you move your handlebars to steer.. Do you think maybe you could try mounting it onto your frame (just below the neck) to help stop that shake? the handlebars seem to be just too much movement for a video camera.
fireballxl5 (author)  laernmoer8 years ago
I'll have to see, I might have to try a different bike, my Tarmac is almost entirely Carbon Fiber and I didn't want to clamp the camera mount to anything but the stem for fear of crushing a CF part. Thanks. This project has been a true collaboration, the suggestion for the RC shock absorbers cam from comments on the initial project.