Treadwell WED-15 .......the Rise of the Machine..... Part 29

Post started 4th September 2025 - into October.

Treadwell has taken a back seat for a while now, but I wanted to finish building him before our annual builders Christmas meet-up, so with renewed energy.

List of things to do is always a good start:

    1. New idler axles                x 6 off👍

        New drive axles                x 2 off👍

    2. New correct Wheel spacers x 6 off👍

    3. New motors                     x 2 off......................??? 👈

    4. Signal booster fix. 👈

    5. Mast box build - 3D printed parts etc. - click here to see Box Build Post.   

    6. Remove the original guide wedges from the tracks.👍

    7. 3D print more new round track guides. 👍

    8. Remove the paint from the drive wheels [sticky]👍

    9. New front 'tension' blocks. 👈

    10. Unexpected track repair......... but then a WIN!!! 👈

    11. Volume knob. 👈

    12. Fake antenna UPGRADE. 👍

    13. LED's fitting to 'eyes'.

    14. Constraining the ‘eyes’ to each other.

1. Starting with....new axles:

I bought an 8mm dia rod months back, but it was slightly over size so needed turning down on the lathe in work, to fit through the bearings etc.

First one turned out good [turned.....machined.....see what I did there 😂]. Only having lunchtimes to do this, drill a centre hole to then use a revolving centre so as to be able to machine the full length of the spindles. Next is to then thread the ends for the flanged M8 Nylock nuts.

I also needed to machine up two new longer drive axles, to allow for the wheel spacers. These are 10mm diameter, stepped down to 6mm dia for the shaft coupler. No reason really for the 10mm dia size, except that this was going to be the size for all the axles.

2. Wheel spacers:

On closer inspection of the alternative WED base droid, seen in Mos Eisley ally way, WED-9-M1 (Star Wars Fandom), you see that the tracks are spaced away from the body!

WED-9-M1 DROID

So I had drawn up and 3D print off spacers, to match. Not sure how, but I got the diameter different, so had to reprint these. Not sure yet if these will be free rotating or if I will glue them to the wheels.

Pic from July 2024:

3.New Motors:

A possibility......???

My thoughts were that perhaps they wouldn't be up to the power needed. Even though testing proved they are.

4. Signal boosters:

I found that when WED was fully assembled, I was having problems with controlling his arm and head. One possibility was that the battery was low. The second was that [with my first time sending a signal over this long length of cable] the signal was too weak. So I bought two sets of boosters fly-leads to try 👍.

servo signal booster

5. Mast box build:

I had already drawn up plans for this when I designed the head box. See independent post for more details.

6 & 7 Track guide wedges - DELETED:

The 'screen accurate' guide wedges, were unfortunately too stiff for the tracks, and weren't flexible enough. So had to remove them and replace them with the new 3D printed round track guides [POINT 7].

7. Track guides:

I tried a few different variables, one being a slightly tapered diameter, after my original 'cannon' style didn't work, I decided to try this [credit goes to Paul's Bots]. Link to Paul's tread/wheels build.

I need to narrow the wheels channel for better location of the guides. So more 3D CAD/printing required.

UPDATE: 16.9.25

The new inner wheel guides printed great on version 2. These were slightly modified for structural strength and because visually they don't need to have the slits in like the wheels themselves.

After testing, I will update the 3D wheel models to incorporate this addition.

Here are the new wheel inner track guides, in black, glued in.

idle wheel with inner track guides

Test first guide popped into place on the track.

 

As with Paul, I made a 3D printed drill template so that the holes would all be central on the track. I did have to modify mine from the one I created from my moulds as the teeth sizes were slightly narrower.

So a total of 140 were printed off. 80 off each for every other groove.

8. Drive wheels paint removal:

The paint reacted with the curing rubber had became sticky, sticking to the tracks. So using sand paper, I removed the thick paint from the outer diameter faces.

9. Front 'tension' blocks:

The axles for the two front wheels were long enough, so I just altered the [3D printed] inside face that has the nut recess, so that a Nylock nut can secure the axles in place.

The location on the base has to be repositioned as the original tracks were a bit too long, requiring some woodworking alterations.

10. Track repair/replacement:

It wasn't on my original list of things to do, but on removing one or two of the 'track guide wedges', on an early join [one NOT overlapping] the joint broke. So I ordered some more rubber mix, but repair work will be put on hold as....... 👇👇👇

New Tracks:

11.Sept.2025

I thought I'd have another search inline for the tracks [super-charger timing belts] and found some here in the UK [at last]. Decided to bite the bullet and purchase a pair.

Click picture for link to Bolton Engineering Products.

I have no affiliation with this company, am linking for future builders.

The calculated cost of me making my own tracks was over £100 in total, not including the time to design up and 3D print off the moulds etc. The fact that they are also NOT internally web meshed, didn't fill me with confidence on they're lasting performance. They would still be ok for 'display' purposes.

UPDATE: 16.9.25

Belts arrived and I couldn't be more happier 😊😊😊😊😊

It may sound strange, but there are certain things that, for reliability, need to be sound. The fact that Tread needs the tracks to be 100% dependable/straight/strong, means that driving him with confidence is now a guarantee.

11. Volume Knob:

Still not as loud as R5, plus it does need to have a noise suppressor fitted. So whilst searching for ideas, I found this for drone fpv video feed interference suppression.

I fitted it, after some testing to find the cause, inline with the mini 'step down voltage regulator.'

And of course, I had to CAD up a bracket for it to be mounted onto the control board. The volume still isn't up to the loudness of R5......

12. Fake Antenna base:    [6.10.25]

I wasn't really happy with the fact that the fake rear antenna, was made out of a steel piece of bar, no flexibility and defo safety concerns lol.

So drew up an adaptor in TPU that fits between the two parts as a test. This then fits onto the original base part. The upper section is also now a found piece of leftover carbon tube.

13. LED's fitting to 'eyes':    [8.10.25]

This had been on my to-do list to bring some 'life' to Tread. Recently got hold of some large blue bulbs and sockets for them off eBay. Drew up a holder in CAD and 3D printed off some test versions, figuring out along the way how best to install them.

Originally it was going to be on the inside base of the head units.

Idea no2 was to mount the LED brackets to the rear of the lens window frames.

Tested the LED bulb behind the acrylic and it looks good, but needs to be diffused more????

14. Constraining the ‘Eyes’: (16.10.25)

The single-servo’d ‘Eye’, wasn’t very well linked/connected to the other. This bugged me!

So I needed a better way to constrain its movements.

I came up with the idea of installing the geared parts from a broken servo, into the unservo’d housing. So I re-designed the fake piston and connected both servo horn arms to it. Making the second ‘eye’ constrained with the servo controlled one.

UPDATE POST WITH picture(s)..........

Almost the end of November, and still have a few last things to get ready before the annual Droid Builders Christmas get-together....

A weekend blitz on the to-do list including the mast box build, and the final piece was to open up the slot for the front wheel axle, and some new location plate holes.

All (99%) complete, ready for next Saturday…… display and testing lol.

This Build has reached 29 stages, so to round off, I'll post one last Blog update with loads of photos lol, to make it a nice round 30.

#treadwelldroid #droidbuilders #rebeldroidsnet #3dprinting

R5’s Bad Motivator 2025

 February 2025.....

Back on it again these last few months, waiting for delivery of different components to get R5’s bad motivator setup all working from one switch off the RC transmitter.

A new receiver paired to use a different channel not used on main body, worked when bench testing, but didn't work when both receivers were powered up. So it's back to the drawing board on this.....

An Adafruit sound board, mini amplifier, voltage regulator and utilising a speaker out of my parts bin lol.

Then 3D printing of brackets to mount these parts.

Then one new momentary servo controlled switch to control the adafruit sound board, and one on/off switch for the ‘Bad Motivator smoke setup’.

‘Trading Card Dispenser’ control box - servo switch controlled [Part 2]

Back in 2022, I posted up about the electronics

for the TCD Control Box.

This was supposed to be THE new RC switch controlled unit, see picture.

Wrong RC switch [not a momentary one]

.....rather than the previous (and very successful it was too) remote controlled version picture here below.

original remote controlled fob version

The new RC switch that I thought was the correct one, wasn't a momentary version, but an on/off one.

Momentary RC switch

So I had to get a new RC switch, from Model Radio Workshop.

The above switch then links to a (original design) micro voltage regulator (seen in next image) and an adjustable automotive timer (orange)

• The single relay controller (from model radio workshop) has been designed to allow modellers to switch one item on and off (max current 1 amp).
• The unit also allows the user to select latching or non latching mode, so in latching once switched on it stays on until you trigger it to un-latch.

These have gone up in price so had to find another (cost effective) type of adjustable timer, (The timer unit is the orange relay in below picture).

Components List for a RC Transmitter switch version:

• Momentary RC switch from/or similar link to Model Radio Workshop: MRW06 Single Relay Controller Switch
• Adjustable relay timer: example here.

Components List for a Remote control relay switch version:

• Remote control relay: example here.
• Adjustable relay timer: example here.
• Voltage regulator, 12v stepdown version: example here.

The above two versions have different 3D housings (If you'd like this), these can be found on my Prusa account page, FREE to download and print.

I have now created a Facebook page,

dedicated for the

Trading Card Dispenser.

To help and for others to share their builds and modifications etc.

R4-D4 dome - life form scanner update 2024 (not completed)

Original post - July 2024:

It’s been a few years now since I last worked on the lift setup. So decided I needed to get back on it again.

The problem I had was being able to set up the Pololu control board.

October 2024: didn't get around to following up on this......

R5’s bad motivator smoke system PAGE

Just remembered I hadn’t uploaded the page that documents my R5’s bad motivator smoke system.

It has links yo my YouTube channel for the videos on there, including the latest test design.

This was the current setup, before I redesigned the electronics/electrical and motivator activation system.

Battery Packs: salvaged from skip

A storage unit was being renovated, and the skip is right outside my office window, so every morning, lunchtime and evening I check to see what’s gone in lol 😄.

I saw some electrical boxes and picked two out to see what was inside, if anything could be salvaged. To my surprise, one was a home made 12v power pack with rechargeable battery and the other was a charger (home made parts).

Gave the power pack a switch on and they lit up.

Tried the charger and it also worked.

Hooked them up and it charges the power pack!

They will need new connectors to be fitted, so that they can be utilised properly.

These will come in handy at events.

Treadwell WED-15-77: Part 26 - The last pieces

 

March into April into May 2024

Final pieces………??? :

The second mix of rubber for the tracks was ordered and arrived in a few days.

I poured the remaining tracks and then it came time to join the first complete track together.

Because of the flex, I had to hold the joining ends in place with two metal ‘V’ blocks, above picture.

Teeth moulding attempt No1:

I printed a larger version of this mould (above picture) with more recesses, so one mix could do loads in one go. I didn’t use it though.

I tested the loctite 480 glue again and although it held, it didn’t last long though.

Then I remembered Sikoflex! This is similar to silicon sealant, but is stronger for bonding. I bought some to test on a sample piece of track.

Before I used the Sikoflex, I attempted to bond the ‘teeth’ onto the track using some of the rubber mix. This time I didn’t press down too hard, just held it gently in place. Two test pieces later and they were on solid….. but again it didn’t last long. Tried to fix in place with a pop rivet, but that didn't work.

NOTE: I think the main problem is that the 85 shore hardness is too hard when poured to the thickness required. It's ok (flexible) when poured at the track thickness. May need to look at using the softer shore hardness that I had a sample mix of previously.

Ordered some 60 shore rubber (sample bottles I had previously purchased and tested) to test in the newer mould. These should be a lot softer but still retain some rigidity due to the height.

As for fixing them onto the track, think this will require a definite mechanical process.

Teeth moulding attempt No2:

Here is the second attempt at moulding the tread teeth. The mould was dimensioned to the unofficial blueprints, they are longer than my mould version 1.

** pic **

These came out great, though some of the mix did leak out of the bottom of the mould. They will flex, but still have rigidity.

After more YouTube research, I noticed that the surface needed to be 'roughed up' before bonding to help give the glue something better to 'key' with. On the first test 'tooth', using loctite 480 glue, this worked to help bond it to the track!

Track Fitting:

Next up, test fit of the assembled track No1, onto the wheels.

Track mouldings No2:

Here are pictures of the last section of track being moulded.

Still managed to have some problems with bonding these together. Patience is definitely a requirement lol.

May

Saw the completion of the tracks.

I found that the faces of the track and teeth, needed to be really roughed up! So dug out a wire wheel and attached it to a drill.

Once done the teeth bonded much better to the track. Wire wheel on drill.

Track one was complete,[May 7th], time to fit it onto the wheels.

🛞🛞🛞🛞

Front Wheels location:

Before I could work out the length for the last section of track. I needed to fix a few things. The exterior plate needed to be modified slightly, to allow locking nuts and washers to be used.

The plate was increased in thickness to locate the nylock nuts in place (along with a recess for a washer).

This worked great and made locking the front wheels in place even easier. This upgrade did through up a slight hole alignment issue, requiring two to be drilled slightly larger and straighter lol.

[April]: The next issue though was that there wasn't enough movement to pull the track tight. So after measuring the possible distance needed, I modified the inner and outer locking and location plates to be able to accommodate.

These were re-printed again and helped with keeping the track 'tight'……but the next issue was…..

Wheel alignment: [April]

When tightening the track on the front wheel, the axil would 'bend' (not actually). I would that the 'washers' I had 3D printed were flexing under the tension of the wheel. I swapped them over so the metal washer was next to the bodywork and then the 'plastic washer' between it and the wheel hub. This improved the alignment.

**pics of new brackets**

Speaker:

Didn’t get this far….

Battery brackets: [April/May]

Was thinking about repositioning the battery and combining the brackets into the mast base bracket. Didn’t get much further done either lol.

Servo leads: [May]

New servo wires were made to connect the Sabertooth speed controller to the RC receiver. Then the servo leads from the mast socket were connected to the receiver.

Not in correct slots yet!

Additional arms:

As I mentioned in Blog post (part no.) I had painted up left over arms that I was thinking about using. I then had a thought about actuating the gripper tool, which led on to actuating the whole arm, like the claw one.

This I completed, and will share the files on my Prusa account, but for actually using it on WED, it wasn’t till I’d made a new bracket that I realised that there wouldn’t be enough room for the servos etc.

**picture**

April/May:

After being paid I was able to purchase the (hopefully) last mix for the rubber tracks.

I made tracks to gets these finished as I NEED to get him ready for the South West Droid Builder’s day here in Bristol, Sunday July 7th 2024.

Last few pieces to fit together for WED to be done.

Powering everything up…..

Testing of the motors, servos etc and the transmitter….. in next post!

Treadwell WED-15-77: Part 25

 March 2024

I started this build back in November 2021:

Link to part 1 and now it’s coming to be completed this year 2024.

I will be creating a page viewable via the top tabs (PC) or via the drop down menu on your phones which will have links and photos to these posts.

This month:

• Spray Painting
• 3D printing
• Rubber track moulding (YouTube)
• Re-assembling
• Electrical installation and testing

Painting the base:

I stripped the base of everything not made of wood lol, a pain, but it means I don't have extra weight and also I don't have to worry about something getting knocked by accident.

I then masked off the paint I wanted to keep and sprayed the bare wood with primer.

Some of the area's not sprayed are because these are going to have panels covering them, as painting neatly wouldn't of been easy. Here’s the masked off areas, spray primer work.

Once happy with the primer, I applied the blue paint.

A clear coat was going to be applied once dried, but the order didn't arrive, so this will have to be done at a later date.

Painting extras:

The one remaining wheel, plus the front wheel brackets and the lid supports, all got a coat of silver (not Plasti-kote) paint.

Also sprayed up were these missed wheel bushes and the mast base support.

Servo connections: block plug or just loose.

(Planned work, now next month’s schedule)

Tracks:

Ordered a single batch of two part mix of the mould mixture, to create the tracks with. I thought, if I need more, I can buy more.

The new track mould I printed last month didn’t print out very good (lifted off bed so not flat). Later, after a few failed prints, I found that the nozzle wasn’t as clean inside as I had thought, even with hot and cold pulls. So I didn’t reprint it as I already had two moulds anyway.

I used my original moulds (green filament) ones. Dusted with talcum powder as a release agent. I had seen this done, but don't think it works too well in this application lol. Read on for what I eventually used.

Here are the track moulding in progress. I made a video of this now up on my YouTube channel.

In the video, the track that couldn’t come out of the end of the mould was due to the filament that didn’t have support and had sagged, so the fluid mix was absorbed into it, bonding it together.

This part of the mould has been removed (cut out) and sealed with superglue.

Only one of the two mouldings poured, cured, bit disappointing really and don’t know why?? = after a few more attempts, I figured out that the mixture wasn't mixed properly and so hadn't cured properly.

Here is the joining plate with two ends, of already moulded track in position. Mixing up and pouring into this, joining plate, joins these together.

The poured join. Inside doesn't look great, but that's not important.

This was another poured moulded section.

Here is all the track made so far, these will all be joined when the second delivery of mix arrives.

The mixing and moulding process improved as I went along. I now have enough moulded to complete one full set of tracks, but will have to order a second batch of mixture.

Guide teeth:

I did have a go at moulding a ‘guide tooth’ onto a piece of track.

This first attempt, didn't work. The rubber didn't bond to the back of the track like it does with the joining sections, as I had expected. Once released from it's mould, the thickness (height) effected it's ability to flex with the thinner track when moving over (around) the drive wheels at both ends. So am going to have to look at something else or another mould idea.

Glue:

I did find and test out some special loctite glue which can be used on rubber.

This seems to work, still testing, but this could be what I need.

Mould Release:

Here’s the mould release agent I used, found a can in work:

The following picture was the last of the mix I had to bond together two pieces of the track. The rest went into one and a half track mould.

Video of the track coming out of the mould on my YouTube channel.

Test laying the track on the wheels:

Re-assembly:

As the build progressed, little snags appeared. One being my choice to use nylock nuts and washers to secure the front wheel brackets. The protrusion restricted the required clearance and they would catch on the inside face of the wheel.

Plus i needed to trim the bolts down in length, and use normal nuts with thread lock.

Not to waste the nylock’s, these were swapped over on the mast base support bracket.

Electrical:

I needed to move the power switch to the outside panel for ease access. This meant unsoldering the switch on the panel, adding a new plug connection and fitting the switch into its new location.

I drilled a dia 20 hole and fitted the switch just behind the mesh panel.

I finished off adding the power cable from the battery to the board, via the switch. And (test) connected up to the battery……

…..we have lights on the components.

Will the next Blog post be the final one…..????