When tapping a hole, you will get a lip of material around the hole. To stop this from happening, use a single flute countersink and bore out (you can do this by hand with aluminum) a small bit around your hole. You can do this post tapping if you want, but then you have to run the tap through again to make sure you did not screw up the thread.
The Single Flute Countersink set is next door above all the taps. 82deg for english, 90deg for metric.
Also, MANIFOLD...I never really knew what the definition was exactly. Maybe because it has multiple ones:
For basics, a manifold is "something having many different parts or features".
In Machinery, manifold means "a chamber having several outlets through which a liquid or gas is distributed or gathered".
Thursday, March 19, 2009
Tuesday, March 17, 2009
Tuesday, March 17, 2009
What Brad is looking for when he asks for mass properties of a system so that he can design isolation system:
If isolators are already in place, give locations of isolators relative to origin.
Clearly specify the coordinate system.
Give him the inertial properties as aligned with the output coordinate system, along with mass, distance from origin to COG, etc.
This should all be included in one easy to reference document!
If isolators are already in place, give locations of isolators relative to origin.
Clearly specify the coordinate system.
Give him the inertial properties as aligned with the output coordinate system, along with mass, distance from origin to COG, etc.
This should all be included in one easy to reference document!
Friday, March 13, 2009
Friday, March 13, 2009
Parasolid and Step Files:
These are kernels that communicate and migrate 3D surface or solid data - NONPROPRIETARY information . They do not communicate things like features or extrusions, or material content!
If you want to see for yourself, just open them up in text editor! They are saved in an ASCII format. All the numbers in this file only communicate 3D locations.
These are kernels that communicate and migrate 3D surface or solid data - NONPROPRIETARY information . They do not communicate things like features or extrusions, or material content!
If you want to see for yourself, just open them up in text editor! They are saved in an ASCII format. All the numbers in this file only communicate 3D locations.
Wednesday, March 4, 2009
Wednesday, March 4, 2009
OK...I need a way of remembering which is single-ended and which is differential.
Single-ended is when you have one wire and compare it to ground
Differential is when you have two wires and difference the two.
...now to remember this, only one of these has a "g" in it... sinGle-ended... and that's the one that references Ground.
ECTRON AMPLIFIERS (563H)
yes they are a pain to deal with.
To zero the bridge:
1. Short the input connection(pins B and C...pin layout can be found in schematic in back of manual).
2. Put gain to 1. Adjust RTO (referred-to-output) until output is zero.
3. Put gain at 1K. Adjust RTI (referred-to-input) until output is zero.
4. Put gain back to 1... if output is not zero, do steps 2 and 3 until it is.
Single-ended is when you have one wire and compare it to ground
Differential is when you have two wires and difference the two.
...now to remember this, only one of these has a "g" in it... sinGle-ended... and that's the one that references Ground.
ECTRON AMPLIFIERS (563H)
yes they are a pain to deal with.
To zero the bridge:
1. Short the input connection(pins B and C...pin layout can be found in schematic in back of manual).
2. Put gain to 1. Adjust RTO (referred-to-output) until output is zero.
3. Put gain at 1K. Adjust RTI (referred-to-input) until output is zero.
4. Put gain back to 1... if output is not zero, do steps 2 and 3 until it is.
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