KitchenAid KSM150 bowl won't stay put

There is sod all difference except it comes with a glass bowl where the KSM150 is stainless steel bowl.. Motor is the same so not more powerful.

When you have the head lifted up the screw you can see in there from the front in the middle by the hinge is the head height adjuster. You need to set the height correctly now so that FLAT PADDLE just clears the bowl. Unscrew it anti clockwise to raise the head. Once that is done turn the machine upside down on a towel and check that the locking screw on the hinge pin is tight, it\'s right up inside the pedestal.

The screw under the head is for adjusting the head height for when the standard paddle and bowl are being used. First tip the whole machine upside down and tighten the hinge pin screw right up inside the pedestal post. Next reset the head height with flat paddle. Screw in is head down, screw out is head up. You want the paddle to just stop tinging the bowl on high speed.

The KSM5 and the KSM150 are different mixers. They are both 5 quart mixers and use the same gearing and motor. However the bowl design is different. The KSM5 is a 5 quart bowl lift, which means the bowl locks into the arms of the mixer and raises towards the head of the mixer, where the ksm150 mixer is a artisan mixer, which is also a 5quart mixer, but the head of the mixer tilts back and the bowl twists into the base ring to lock into place. These two mixers will take different bowls and beaters.
Thank you,
Colleen
Customer Service
MendingShed.com

I'd be looking at making sure the beater is not banging on the bowl and that the head hinge isn't loose. The bowl is secure on the base with this system that has been in use for decades so you are looking for a fault not a re-design of the system. The friction of the mix in the bowl should logically tend to tighten the bowl, not undo it. I have seen a malformed bowl once where the lugs weren't big enough and I suspect that it's possible for there to have been the odd malformed bottom plate with not big enough lugs.

Firstly, I think you mean "flour".
Put in your ingredients. Cover the mixer, head and bowl, with a dishtowel. Turn on mixer to "stir" (or lowest speed). But! Mix only for 1 or 2 seconds. Repeat this, with bowl covered, until flour is mixed in enough not to fly out.
Happy baking!

the solution to this is to tighten the screw visible through the base that intersects the pin. Turn the machine upside down and using a long flat screwdriver tighten the screw.

This may be explained with the bowl assembly. Being a bowl lift mixer, please follow the following steps to make sure the bowl is being secured before mixing:

There are the bowl-holding arms on the left and right hand side of the mixer. You will place the bowl on these arms, securing it onto the pegs.

Also, take your fingertips and press down firmly at the back of the bowl where it is resting against the base. You will hear an audible click as the bowl secures down into a spring latch mechanism on the stand mixer base, allowing the mixing bowl to sit flush and secure.

This may have a simple solution: This sounds like an issue of beater to bowl adjustment, which can come out of alignment naturally over time and with use of the machine.

If the flat beater is striking the bottom of your bowl, this may cause the locking mechanism to loosen and may cause the mixing head to "bounce" during use.

Your Use and Care Guide will cover the "beater to bowl adjustment," which you can do at home in a few minutes with a flathead screwdriver.

If the beater to bowl adjustment quickly comes out of alignment, you may need to seek service. You may find a Kitchenaid certified service location locally at the following website:

http://caservice.kitchenaid.com/

The solution provided by luannej is useful only if your mixing attachment is striking the surface of the bowl. By adjusting the screw located at the junction of the head and base, you are actually controlling how far the head is allowed to tilt forward and, thus, the height of the attachment above the bottom of the bowl. Although the attachment striking the bottom of the bowl will lead to wobble (and noise!), it isn't usually the root cause of the wobble. In fact, the wobble may be causing the bowl strikes and adjusting the head height only hides the problem.

The head of the mixer is secured to the base by a large steel pin. Any play between the head and base comes from this hinge and its resulting tolerances. To "tighten" the sloppy tolerances causing your wobble, follow these steps: 1) Lock the mixer's head down and turn the entire mixer upside down. 2) Looking deep into the hollow base, find the small slotted set screw. This screw actually presses against the pin and takes up the slop between the head and pin. Note that this screw is not the large slotted screw I mentioned earlier visible when you tilt the head back. 3)Tighten the small set screw as much as you can. Your wobble should be greatly reduced or eliminated now. 4) Lastly, you may want to readjust the large screw controlling the head's tilt to optimize the distance between attachment and bowl. Hope this helps.