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Depth measurement using a dumpy level.

How do you measure the depth of an excavation to a predetermined point just above the surface of the ground usinga dumpy level.

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  • Thomas F. Schneider May 11, 2010

    If I underastand you question correctly you want to know how to use you instrument to determan the depth of a hole,correct? Level instrument. place a stick into the ground just past the hole you wish to make or measure. Have someone else mark the spot that the instrument indicates. Measure with a tape down for there. or put two story sticks with a string on the mark between them if wish to measure closer to the bottom center.

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First level it up in all directions then take a shot of your tape measure or marker stick at the predetermined point, write this measurement down, then take a shot of your tapemeasure reaching down in the excavation and then subtract the predetermined measurment from the excavation measurment and this will tell you how much deeper your are than your predetermined mark.

Posted on Feb 13, 2009

  • Francis Nagel Oct 03, 2013

    Do i follow the same steps when i want to install a floor frame and level it

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I have a mitutoyo dial depth gauge. How do I use and read this?


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1 Answer

If we are excavating a drain and i have to level the drain how would i use dumpy level to know how much i have to excavate


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I am unable to raise or lower the cutting surface of my DW734 thickness planer. The turn handle is very hard to turn. Is there some kind of a locking mechanism ? If I had a manual I might be able to figure...


Follow this link: http://servicenet.dewalt.com/Products/Detail?productNumber=DW734

This will allow you to download the manual and exploded art for base, cutterhead and motor. You may also want to check the position of the turret stop. First of all, make sure the cutterhead lockdown lever is disengaged. Here is from the manual:

Your planer is equipped with a turret stop (M), shown in

Figure 11, for repetitive planing of pre-set depths. Stops are

set at 0", 1/4", 1/2" and 3/4". Use the 0" setting when planing

between 1/8" and 1/4".

TO SET A PLANING DEPTH

1. Be sure the carriage is set above 1-1/4" before trying to

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2. Turn the turret stop until the desired measurement

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3. Unlock the head lock lever (Fig. 8). Turn the depth

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increments, until it contacts the turret stop.

NOTE: DO NOT USE FORCE TO CRANK THE CARRIAGE

BELOW THE LEVEL THAT THE TURRET STOP INDICATES.

PERMANENT DAMAGE TO THE HEIGHT

ADJUSTMENT SYSTEM ON YOUR PLANER WILL

RESULT.

NOTE: The 3/4" turret stop can be adjusted for other planing

thicknesses. Adjusting the 3/4" turret stop does not affect the

other turret stop settings.

TO ADJUST THE 3/4" STOP FOR OTHER

THICKNESSES

1. Unlock the head lock lever (Fig. 8) and turn the adjustment

handle counterclockwise to raise the cutter head.

2. From the back of the tool, locate the turret adjustment

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to loosen the jam nut. Adjust the bolt up or down to
reach the desired planing depth.

3. Turn the depth adjustment crank, lowering the carriage by
the desired increments, until it contacts the turret stop.

Hope this helps.

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1 Answer

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http://www.mytoolstore.com/starrett/micro029.html

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1 Answer

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