pmarc's latest activity

I assume you noticed that pretty much same conclusion (regarding the effect of the usage of the translation modifier on the hole) was...

The hole may not and will not exactly be round so the nominal sides may not be the actual sides. If the tertiary hole is referenced...

I don't have an opinion here and, to be honest, it is a difficult question to answer. It's like asking whether it is good or not that...

3DDave, I don't understand what component of a tertiary hole for a spot weld directly controls rotation. It's the hole, as a feature...

greenimi, In the newest version of the ISO standard for datums, ISO 5459:2024, they have not changed their default to basic orientation...

The tertiary hole could be there to enable spot welding and as such could have pretty generous position tolerance relative to A|B. But...

"May be aligned" in the text refers to the datum feature in nominal condition, not to the TGC of the datum feature - at least that's how...

The rule in 4.5.3(d) says the tertiary simulator must merely be oriented to the primary and secondary datums. Fig. 4-15, however, shows...

We can call it "undefined", if you prefer, even though para. 4.5.3(d) seemed to provide the default. Unfortunately, in the figure...

greenimi, I don't think C at MMB would make sense in this case. In my opinion, if it was secondary or tertiary (with A and/or B being...

Burunduk, The intent behind the introduction of the translation modifier in the 2009 standard was... well, to have a way to define what...

mhorbacz, In this case the primary datum is not only used to orient the hole but also to locate it from. Despite that most figures in...

greenimi, Burunduk said that only one of your statements was true. In my opinion, both are true (if we take them as general statements).

As far as I can tell, one situation when the exact same condition for both DRFs could be obtained would be when the center plane of the...

Burunduk, Are you sure about your assessment of greenimi's statements? Imagine the pink center marks in greenimi's sketch representing...