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Hello Frans, As I know the old ft encoder makes 75 pulses per revolution, as documented in the ft manuals. This was a bit scared! I immediately took new measurements with more revolutions. Because I have a visual homepoint on my encoder, I can easily see if there are 75 or 76 pulses per revolution....

Today I made a test to measure the accuracy of the FT encoder motor FT135484. This is an encoder motor that can only deliver pulses, but contains no direction. The TXT Controller has its own function to control the starting and stopping of the motor. We already know from other reports that this is n...

Running the previous test with the new software version V4.4.3 give the same timing results.
Until now, I don't see any problems with the new software.

Frans.

Additional test to measure the speed of the TXT Controller. One lamp output controls the next input. You can follow the timing on the Logic Analyser. Things are not going very fast. The TXT Controller has an internal multitasking system. Task switch seems to me to be somewhere around 4.78msec. He ne...

Deze dual kogelbaan is zo gemaakt dat de beide kleinkinderen de kogels kunnen inbrengen. De kogels worden verdeeld tussen de 2 zijden. Indien ze beiden evenveel kogels inbrengen blijven ze steeds rondlopen. Een centrale XM-motor met ketting en magneethouders brengt de kogels naar boven. Daar worden ...

Speed test fast input C1C of the TXT Controller. The aim is to determine the maximum pulse cycle that the controller can process. The documentation states that this type of input would work up to 1 Khz. I made a pulse generator with a 9V block wave and a 50% duty cycle. A small program counts the pu...

Test of the TXT Controller for making short pulses. This is not going very well at all. The specified pulse widths and times are incorrect. The Robo software always uses a PWM cycle with a minimum time of 4.78 msec. You can specify a pulse width with a resolution of 512 units. But he doesn't do it t...

The TCS34725 color I2C chip supports auto increment address mode. You can read all 4 color data registers at once without interruption. You only need 352 usec, otherwise this is 20 msec. To achieve this, you only need to leave the devices open as shown on the flow: https://farm2.staticflickr.com/176...

Test of the color sensor I2C module TCS34725 connected to the Fischertechnik TXT Controller. With the test program of Dirk Fox I was able to start very quickly. Everything works very well, now I can start a new project to sort colored pearls. The box contains 2300 pieces in 11 different colors. Idea...

The PCB has just been etched and the components have been soldered. Everything fits neatly in the Fischertechnik housing. A 10-pin cable is connected directly to the TXT controller. The sensor modules are also soldered and mounted. The power supply voltage has been tested. All modules are supplied w...

Today I designed the interface to test my I2C modules on the Fischertechnik TXT Controller. For this I made a simple interface box with Fischertechnik parts to fix the print. The PCB is a simple single side version for mounting and testing the I2C modules. Diagram, layout and installation plan are r...

The program for the matrix 8x8 robot has finally been put online on the download page, I had already done this 10 days ago, even twice, but because of this it is now double placed on the download page. If a moderator can take one back it would be nice! Today I expect the delivery of different I2C mo...

The project with the robot for the matrix 8x8 has been completed. The last difficulties have been solved, like the backlash and the slow positioning at the end. I have built these functions into the external hardware so that the TXT controller only has to give the command "go to the position". It is...

The new quadrature encoders are now also mounted on the x-axis of the robot. I use an additional reference detector for this. Together with the home signal and the direction on the encoder, I obtain an absolute position. Each time the robot moves in the right direction over the switch , and at the h...

I made an extra adjustment for the rotary encoders. The aim is to enable an auto calibration in which the position of the robot retains an absolute value. To do this, a one-time calibration procedure must be applied at start-up. An extra switch is needed on the robot arm. It is located in a unique p...

The assembly of the SPI 24 bit input box is finished. The box is connected to the external hardware and tested. I now have 24 additional digital inputs for my Fischertechnik projects. The status of these 24 inputs is also shown on the LCD display of the external controller. They can also be read via...

Today the material arrived (delrin) to make the rotary encoders. After previous tests, I decided to use only 10 magnets per encoder. If you are using a worm M1.5 this is still 0.12mm/pulse displacement. In this way, the maximum encoder diameter is limited to 30 mm, which is standard with Fischertech...

A small update: Because of problems with my mechanical rotary encoders, I started working on a design to make it myself. The purchased encoders were perfect until an axial pressure came up. As a result, there were internal deformations which resulted in malfunctioning. That's why I started my own de...

In order to provide the input with the steel balls, a transport of up to 64 balls had to be provided. Not so simple because the balls don't roll forward easily when they are lying still. However, I have provided a control sensor when picking up the ball. If there was no supply, I can intervene. A wa...

The additional XS motor has been added to the Robo TX to feed in the steel balls. I have taken some detail photos: https://farm1.staticflickr.com/886/42425629332_f4011e5b74_b.jpg Original HD: https: //www.flickr.com/photos/fotoopa_hs/42425629332 https://farm1.staticflickr.com/897/28603830098_6752ed9...