The mixer rpm is too fast

There's a governor assembly inside that is bot working any more.

On low speed roughly 1 rotation of the planetary per second. On high speed it should be the maximum speed that motor can run at, too fast to count that's for sure.

The speed adjustment is defective. You will likely need a service centre if you cannot open it up and find the problem and change any defective parts etc.

You can get the high speed back if you want to play with those three screws. there is a timing scheme for your mixer and it is set and adjusted by manipulating those 3 screws. The bottom center screw is for speeds 6 8 and 10. The best choice is to replace this switch, about $10 bucks on ebay.

Tll,
It sounds like it could be an issue with the gear, the motor housing could have a crack in it. The problem could be much more involved as well. Put the unit on the slowest speed and see if you can stop the mixer from spinning. If it hiccups or stutters, that means you have a stripped gear. If you cannot stop the unit using your hand ON THE SLOWEST speed then there could be a problem with the motor housing or the motor itself not being held in place properly.

Get a Copy of the Repair Part List from Kitchenaid.com.
You need to adjust the mixer speeds:

Remove the screw holding the End Cover and locate the three screws from the Control Plate.
All three (2 top left and right, and 1 bottom) must be adjusted. Make sure that the Control
Plate is not damaged in any way, contacts are not charred or burnt,etc...

1. Loosen the lock nuts enough & Turn the 2 top screws clockwise until they cannot be turned
anymore. Leave the bottom screw alone for now.
2. Use a dab of white paint or paper whiteout to mark the positions of the Phillips screws.
3. Plug in your mixer and Set the speed selector to "Stir".
4. Turn each top screw One full turn couterclockwise (alternating between Left and Right)
Keep making one full turn at the time (for both left and right) until the motor starts running.
5. Put your hand near the Agitator shaft and allow it to brush your finger slightly. Use your
watch or clock and start counting the number of times the shaft touches your finger in
60 seconds. The correct count should be 60 RPM (Rounds Per Minute). If it is less
or more than 60, give each screw 1/4 turn counterclockwise or clockwise and start counting
again. Now tighten both lock nuts.
6. Set the speed selector to "6" and turn the bottom screw either clockwise or counterclockwise
to achieve a speed of 180 RPM.

For your reference, the planetary RPM's for the 5-qt. tilt-head Artisan Stand Mixer are as follows:
Stir speed - 60
Speed 2 - 95
Speed 4 - 135
Speed 6 - 180
Speed 8 - 225
Speed 10 - 280

Contact Kitchenaid Parts and order a new speed switch. Be prepared to wait a month for it to arrive. It's relatively easy to replace. Be sure to unplug the mixer first. Make note of which wire goes where! If the switch goes bad again in the future, buy a different brand of mixer. ricardok45

Do you find the motor running too fast at the lowest setting? Then you need to bring it to someone to adjust the low speed setting. If you are preparing double batches you are over loading the mixer and/or using too fast a speed setting to mix. Don't try to double recipes just because the bowl can handle the volume, the motor cannot and will not last very long if stressed mixing dough frequently.

Hiya,

Sorry to hear you are experiencing an issue with your appliance.
We have created some videos, that might help you resolve this issue. Please see one of the links below:

https://www.youtube.com/watch?v=bM3t46afGcc
https://www.kaparts.co.uk/Help/KitchenAidHelp/KitchenAidMixerHelp/KitchenAidSpeedSettings/tabid/615/Default.aspx

I have the same mixer and I believe your problem is the governor that is on the back of the motor. You can figure it out by downloading the repair manual here:http://store.mendingshed.com/kitaidparts.html The manual has all the info you need; including a troubleshooting section. The governor is availible from the the same site here:http://store.mendingshed.com/kagovernor.html What tipped me off on my K5SS was looking at the governor as it ran and I could see it moving back and forth; not steady like it should. Good luck!