If you are unable to move your speed slider or the slider is not functioning properly, there are a few common causes.
If you are operating Motion Control v. 3.2.x using an iPad or iPhone, update your iOS and this should resolve the issue.
If operating a wired touchscreen monitor connection using Mozilla Firefox, install and use Brave Browser here.
Navigate to the wifi settings on the PC, turn off the hotspot, and connect to an internet connection
Copy the code right below "Install with one command"
Open the terminal and paste the code, then press Enter
Wait for the download and install to complete
Restart the system and run the GlambotĀ® Motion Control webapp using Brave