Withdrawals will always process for the full available balance in your WePay account.
Once you request a bank withdrawal from WePay, automatic withdrawals will stay turned on in your WePay account. These withdrawals will send you all donations received since the last withdrawal. You can change your frequency to daily, weekly or monthly by following these steps:
1) Sign in to your WePay account here: www.wepay.com
2) Click the 'settings' tab. Here's a picture showing where that is: http://screencast.com/t/Ir9xDYkCNt
3) Click on 'Withdrawals' on the left hand menu
4) Click 'Change'
5) Select from the drop-down menu if you'd like daily, weekly or monthly
6) Hit 'Save
And that is it!
*Please note - if you're in the US and have set up automatic checks, you may choose weekly or monthly automatic checks. Daily checks are not available.