Hello, I'm trying to make sense of one of the specs called out in the rheometer standard. Section 6.4 talks about the specs of the piston. The part I'm having trouble with is:
It's the last part I'm having trouble with. It says the length should be "at least" 6.35. If it's "at least", how can...
Hello, I was wondering something regarding Handbook 44.
Table 4 lists the ranges to verify for scales depending on their capacity. (Up to 150kg, test 100% of capacity. 151 to 1500kg, test at least 25% of capacity, etc.)
Also, Section S.1.7 says that a scale should not give a numeric readout if...
Hello, I don't use the melt indexers in out lab, but I work closely with the people that do. I'm trying to correct some information in our database, and I want to be sure I'm understanding things correctly.
Regarding section 5.4.3, "The combined weight of piston and load shall be within a...
So, we also have some Eurotherm temp controllers. They have an accuracy listed as:
0.25% of reading, ±1 LSD, ±1°C/F
I'm at a loss as to how to interpret this. 0.25% of reading, additionally ±1 LSD, additionally ±1 °C/F?
Hello, we have a new single-screw melt extruder that we bought a little while back. I have to enter all of the data about the various gauges into a database: Model #, Serial #, Manufacturer's range and tolerances, etc.
I've seen this on some temperature controllers, where the accuracy is listed...
Do you happen know what XDR and caddr_t are? (This is why I hate excessive typedef-ing. All it does is disguise what it's base-type truly is, which is not something you want to disguise anyway!)
It also looks like very old code. It's using the old-school function prototype.
We have a Wenzel CMM in our shop. I started training on it a few months ago. Also a few months ago, the tool was having some problems such that we had to call in a vendor. While he was on site he gave my coworker and me some training. A the time, the training was very basic because I was just...
That actually does help. Thank you.
Understood. I was not trying to imply that GD&T standards should bend to my whimsy. My apologies if I did that. I only meant to express my consternation.
Thank you all for your help.
I do get how perpendicularity has no bearing on position. For me, the un-intuitive thing is that position encompasses perpendicularity.
Given that I'm working as an inspector, I want explicitness as to what exactly I'm supposed to check. Location is important? Show me the position symbol...
My apologies if this is grossly insufficient, but, I'm still relatively new to this stuff.
I've been using a lot of statistics to verify my measurements. I would use a height gauge to measure various points. Use a statistics-capable calculator, then compare x-bar to the nominal height, and use...
Thank you for responding. I can definitely see how perpendicularity would be an important aspect, but if that's the case, why not use the perpendicularity symbol?? GD&T has one. Use it!
Likewise, if parallelism is an important factor, use the parallel symbol on a callout for the faces!
One of...
Hello, so I recently got my first job in a machine shop. I'm not new to the work foce by any means - just new to machining.
A brief bit of background: I worked for about ten years in the semiconductor industry (manufacturing). The factory closed. A while later I happen to run into an old...
