I have several problems, anybody who knows the rotricsDexarm very well? First: after trying to update the firmware of the touchscreen ther are 3 dark lines on the screen, nothing else. So what happend and what can I do?
2nd: how can I teach the dexarm the movements without an record- knob in the rotric - studio-programm? In the touchscreen there ist a record knob and very easy to show hiim what he has to do…
Hi @cyberspider and welcome to the forum.
I haven’t used this robotic arm, but did you purchased it from RobotShop?
Also, did you try contacting Rotrics support?
Hi @cyberspider.
I had the same problem with the touchscreen and ignored it for years, because the buttons still worked, if you knew where they were. Recently I tried to find a solution and someone on the Rotrics Discord server got an older version of the firmware V1.1.1 for the touchscreen then the one on the Rotrics website. Installing that firmware worked for me.
You can get the screen to work normally if you follow the instructions of this troubleshooting post on the Rotrics knowledge base, but the arm does not react to any of the commands (this was at least the case for me). It reverts the touchscreen firmware to version V1.0.8.
Does anyone have the actualy file mentioned here? Its not on the site and there is no discord server anymore. I need that older touchscreen firmware. Anyone? 
Hello @DrEvilB.
This is the file I got from the Discord server:
touchscreen_firmware_sdcard_V1.1.1_20201027.zip (22.4 MB)
Just copy the content from the touchscreen folder to the sd card of the touchscreen and it should automatically update once connected to the arm.
I just tried it earlier by installing the faulty firmware version 1.1.1 and reinstalling the one uploaded here and everything worked fine.