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Gear box Design
Log from Low Cost 3D printed Robot Tail
Background Autodesk Inventor Parametric Design Cycloidal Gear (from my other project) N_ (number of rollers)= 21 ul number of teeth = number of rollers - 1 E_ (eccentricity) = 1 mm Rr_ (radius of rollers) = 2 mm R_ (radius of Rotor) = 25 mm x(t)...

Gearbox
Log from Braker One Robot
I made a gearbox with about 29:1 ratio that drives the spine shaft of the robot. It contains two 58:11 teeth gear sets reducing the RPM and increasing the torque. The gearbox has 3 3D printed axles supported by 6 ABEC-7 608zz bearings. ...

3. Test bench
Log from Automated Cigarette Non-Dispenser
The first tests proved to be very effective in crushing cigarettes but I saw very little use for it, so I removed this feature. The goal is to resist 10'000 cycles, which corresponds to about 9 years of operation. With a motor, it takes about thirty...

Rev 1. PCB Assembly!
Log from CRAPi2040
Alright here we go! In case you missed the last log, here it is! Check it out because what you're about to see will make a lot more sense. Just like the last log, this log is going to be a retrospective, but I promise that the next CRAPi2040 log to grace...

Time to mix two designs, A and B
Log from Low Resolution Programmable Matter
I finally 3D-printed it and put the motors and sensors, aka buttons and the scroll for mice, where they should be. I made two sides so I verify the design. Test the grabbing and movement, I did not print the female handle because I wanted to test the...

Project Log 64: DIY Linear Actuator.¹
Log from DIY Mech/Exoskeleton suit.
21/07/2023, Friday, 10:16. For some reason this last week got me too lazy to do anything at all... Well, I will just leave this here and see what I can think of... ----------------------------------------------------------------------------------------------------------...

Step 3: Board Layout Part 1
Log from Open Source Science Tricorder
A quick update after a weekend of marathon schematic creation and board design...Schematic and Initial Board LayoutI've completed the first revision of the schematic. The device is using a PIC32MX795F512L microcontroller, which should be plenty...

X, Y, Z Axis details - Part 1
Log from Monoprice Select Mini Electro-Mechanical Upgrades
Note 1: I capitalize "X-axis", "Z-height" and the like for legibility when scanning/skimming; pedants can hate me later. Note 2: This is part one where measurements and construction details of the mechanical structure are listed. Idealistic modifications...

Packet Stream
Log from Star Trek Communicator Badge
Finally! A reliable data stream! I decided to ditch the efforts I had given into a bit stream (i.e. infinite length packet) and tried to squeeze as much data into a stream of packets. The packet system in the RFM69HCW allows for a packet length of 64...

SPI Low Power Success
Log from Wireless BLE Kinesis Advantage (Custom Controller)
So everything went as planned, using SPI the whole loop executes in under 1ms (compared to 8ms with i2C at 400kHz). I didn't even have to set the SPI speed, the default for the nrf52 was plenty fast. Next, I added delay(17) at the end of the loop, so...

Flexible Suspension — Multi-material 3D Printed Wheel Assembly
Log from Robot Missions
In order to dampen the forces that are applied to the motor axel from the wheel, there needs to be a suspension system. During instances of forces that are applied quickly - the suspension system will reduce the 'shock' (mechanical shock) that would...

Gear trains
Log from Peace Clock
I've spent the last few weeks designing a new gear train for the rollers. Prototype 1 used a small motor with built in gearbox :37-1216RVFM Right Angled Motor and Gearbox 1:220£1.64This was mounted through the rear base part with the motor protruding...

What happened so far
Log from Otto LC
When we decided to do a Otto Bot workshop in early 2017 I drafted the chassis pretty quickly. Although the legs are a bit complicated - the body basically is just a hinged box I already had - it quickly looked like a robot. But only with the workshop...

Making it run quietly
Log from The Spice Must Flow Sand Table
I wanted to make the mechanism run quietly even as it ran fast.Tests showed that even at high microstepping ratios, speeds much over 100 mm/sec resulted in objectionable motor noise. Other sources of noise included the belt teeth hitting the smooth...

Day 3
Log from Air Cut Cutter
I'm three days into development and I can see the light at the end of the tunnel. I really didn't want to fall into this rabbit hole but I did. The gocde output by FlatCAM really needed this to be efficient. When milling circuit boards, bigger...

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