Jack The Ripper Software
Part 1 introduced the project, part 2 covered the mechanics and part 3 the electronics. Part 4 covers the software side.
1. Maestro
Install the Pololu Maestro software and then connect the Maestro to your PC and start the software.
The microswitches should already be displaying their status. Press the switches and make sure they are working.
Enable the three servo channels and manually move each servo to make sure it works.
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- May 20, 2019 John the Ripper is free and Open Source software, distributed primarily in source code form. If you would rather use a commercial product tailored for your specific operating system, please.
Use the software to position the arm over the in tray, DVD drive and out tray. Make a note of the servo position values. Be careful not to go near the limits of the servo as it turns into a continuous rotation servo and loses position.
Use the software to work out a slow speed for raising and lowering the toolhead and also the value to make it stop without the servo making a buzzing sound. Make a note of these values.
John the Ripper 1.7 also improves on the use of MMX on x86 and starts to use AltiVec on PowerPC processors when cracking DES-based hashes (that is, both Unix crypt(3) and Windows LM hashes). To my knowledge, John 1.7 (or rather, one of the development snapshots leading to this release) is the first program to cross the 1 million Unix crypts per. Jack the CD Ripper is an extremely efficient ripping tool that enables the user to extract audio from a CD and export the music into either wav, wma, ogg or mp3. format. No need to run through and rename every track that you rip, with Jack once the.
Finally use the software to determine the servo values for the grippers being fully open and fully closed. Make a note of these values.
2. Tweaking
Open the DVD tray and put a DVD into it.
Use the two M8 nuts next to the hub to adjust the length of the arm so that the grippers are directly above the hole in the DVD.
Swing the arm over the in tray and check if the grippers are positioned over the center. If not swing the tray outwards slightly or add M8 washers as spacers between the tray and the tray anchor. If you move the tray then you will need to check again the servo value need for the in tray position.
Repeat this for the out tray.
3. Raspberry Pi Setup
Copy to the Raspberry Pi (RPi) the following:
- BotServer.exe
Edit config.xml in a text editor and insert the servo values you have worked out.
Free Jack The Ripper Software
Mono needs to be installed on the RPi but the version in the repositories does not work. Instead use the version found here.
Run the server with:
Open the DVD tray and put a DVD into the in tray.
Load a disc by visiting: http://192.168.1.70/botapi/?command=loaddisc
Replace the IP address with the address of your RPi. The disc should be loaded into the tray.
You may have to adjust the YAxisLowertoDriveTime in config.xml which is given in 1/1000th of a second and governs the time spent lowering the toolhead before dropping the disc into the drive tray.
Once the load disc function is working test the unloading with: http://192.168.1.70/botapi/?command=unloaddisc
The YAxisLowertoOutTrayDropTime in config.xml governs the time spent lowering the toolhead before dropping the disc into the out tray. It has to drop from low enough that it consistently goes into the tray, but high enough that when the stack in the out tray is full there is space to drop the last disc.
4. PC Setup
Copy the following files to your PC:
- JacktheRipperBot.exe
- Rip.bat
- ScanningFinished.bat
Make sure the full .NET Framework 4.0 is installed. If you need to install it then reboot before running JacktheRipperBot.exe.
Install DVDFab Passkey or AnyDVD. Both applications have the option to execute a command when scanning of a disc has completed. Set this up to run ScanningFinished.bat.
Install Handbrake and check the correct path to HandbrakeCLI.exe is used in Rip.bat.
Start JacktheRipperBot.exe and enter the IP address of your RPi.
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Go to the advanced tab and try the various operations individually.
Jack The Ripper Software
Once you are happy everything is working enter the number of discs in the in tray and click on Start to start ripping!