Mark Jones, 45, of Cwmbran, Torfaen, has pleaded not guilty to murder at his trial at Newport Crown Court.
Continuing to give evidence in his defence, he said he checked for injuries "once or twice".
The court has heard Amelia died after suffering a "catastrophic" bleed to the brain and a fractured skull.
A man accused of murdering his five-week-old granddaughter has told a court he "thought the baby was alright" after dropping her on her head.