It depends on the configuration of the bow. Generally speaking, for bows with standard risers, I position the bow so that the top roller is near the end of the riser above the limb pocket. The other roller is places under the limb as close to the eccentrics as possible without causing contact when the bow is compressed.
For Hoyt 'Tec' bows both rollers need to be placed on the limbs, one near the riser and the other near the eccentrics. It also helps prevents unnecessary stress to your riser and limbs if you turn down the poundage of your bow before you position it in the press. This is especially important for higher poundage bows.
For Hoyt 'Tec' bows both rollers need to be placed on the limbs, one near the riser and the other near the eccentrics. It also helps prevents unnecessary stress to your riser and limbs if you turn down the poundage of your bow before you position it in the press. This is especially important for higher poundage bows.