Yes. Hi chalk around the bars. Commercial - High traffic area, low pile carpet. It is glued down. Is that uncommon to have carpet in the gym?
No... it's not uncommon... however... if I ever design a new gym... I will do it without carpet.
Use a shop vac like in the other thread for the bar and high chalk area. Any regular vacuum will destroy itself within a couple of uses if you run it though a high chalk area. The vacuum will continue to run... however... it will just not work as well. Usually it will sound different as well.
I am not a vacuum expert... so maybe take it in to the local vacuum store with pictures and videos of what it is doing?
Depending on your model... it may be slightly different... but you need to check to make sure it's not clogged... make sure the belt is good... make sure the roller spins freely with no hair on it (hair needs to be removed every single time the vacuum is used)...
Make sure it is not plugged in when working on it or removing hair from the roller.