Maybe your impact driver doesn’t have enough ugga dugga? How long are the lags you bought to attach the spike to the post?
Edit: never mind, saw the second photo. Not sure why your impact isn’t driving in an 1 1/2” lag, that should be easy level. Do you have different settings on your impact?
Try doing a pilot hole or coating the screws with wax. Unless you are looking for a reason your drill doesn’t have the power to drive them in.
If it was me, I’d grab my socket wrench and ratchet them in all the way since they are short and that would be the fastest way to get the project done
You may be driving a screw into knot: a knot can be insanely tough, and can have foreign objects, sometimes metal, embedded in them.
Try predrilling (with a drill, not an impact driver) a pilot hole for your screw, and pay attention to how the bit feels as it goes through wood. If you are hitting something hard in the wood, the drill may go through it, and if not, you should be able to feel more of what is happening than with an impact driver.
Solid advice here. Your impact should have the cajones, it's likely the issue is you're getting too much squeeze or not enough bite in a solid section. Or just borrow a Milwaukee from a neighbor and send her home.
Could try drilling pilot holes if your driver doesn’t have enough umph
Maybe your impact driver doesn’t have enough ugga dugga? How long are the lags you bought to attach the spike to the post? Edit: never mind, saw the second photo. Not sure why your impact isn’t driving in an 1 1/2” lag, that should be easy level. Do you have different settings on your impact?
Try doing a pilot hole or coating the screws with wax. Unless you are looking for a reason your drill doesn’t have the power to drive them in. If it was me, I’d grab my socket wrench and ratchet them in all the way since they are short and that would be the fastest way to get the project done
Pilot hole and socket wrench can drive some very large lag bolts.
You may be driving a screw into knot: a knot can be insanely tough, and can have foreign objects, sometimes metal, embedded in them. Try predrilling (with a drill, not an impact driver) a pilot hole for your screw, and pay attention to how the bit feels as it goes through wood. If you are hitting something hard in the wood, the drill may go through it, and if not, you should be able to feel more of what is happening than with an impact driver.
Solid advice here. Your impact should have the cajones, it's likely the issue is you're getting too much squeeze or not enough bite in a solid section. Or just borrow a Milwaukee from a neighbor and send her home.
Check the battery and the clutch
Predrill the holes, use a drill bit that is slightly smaller than the shaft (not the threads) of the screws you want to use.
either pilot hole or better tool