HELP-How to stop design from curling!!

I use Totally Stable 2085 cutaway from Gunold and a STIFF 2 oz tearaway.
I have a 17,000 stitch logo 3.5 inch diameter that is going on 6.8 oz pique polo

I am going to try the cutaway called allstitch also available at Gunold and other pellon suppliers. Then I am going to do a wash test.

I tell the customer not to overdry, turn inside out place a hankerchief over the back of the logo and iron with a medium heat

You have several things that you can do:

1) Lessen your fill density some and increase your underlay density.

2) Change stitch directions to compliment the fabric. My rule of thumb is to start with my stitch direction 45 degrees to the fabric weave.

3) Use a different backing, try a cutaway with a soft hand @ 2 to 3 oz.

4) Set your machine tensions as loose as you reliably can! Many shops run their tensions too tight!

5) Find out how the item is being laundered, luke warm wash to cold wash with very low temp drying provides the best world for embroidery, also turn item inside out during the process. If ironing do so on the inside with a light towel or layer of t-shirt.;)

I use medium to heavy cutaway. I also use tearaway with more stitch intensive designs because it improves registration. If you're having problems lightening the density may help. Changing the direction of a fill can make a difference.