I ordered a PM-940M-PDF

[Dan_S]

Have you modified your mill, other than the base? Thanks for the video, btw.

I just switched out the thumb screws that hold the dials, to some better ones.

 

[RonWB1957]

Thanks. I am Jonesin to order it, but need to finish a couple of pressing projects first. Making room for it is another story.

Another question. Have you checked for any run out / drop, when running the x axis all the way both directions? Thank you in advance.

 

[Dan_S]

Another question. Have you checked for any run out / drop, when running the x axis all the way both directions? Thank you in advance.

I did a quick test when I first set the machine up, and i didn't detect anything. Imo, a lot of people get drop because they run loose gibs, not because the table is actually flexing.

 

[RonWB1957]

Sorry for all the questions, but I am hoping this will be my last mill at this point. What kind of run out or back lash have you found with this machine, if any.

 

[Dan_S]

Sorry for all the questions, but I am hoping this will be my last mill at this point. What kind of run out or back lash have you found with this machine, if any.

for run-out on a spindle, it was maybe 2 tenths from what i can remember. Table backlash was maybe 10 thousands, but then i haven't taken the time to adjust the nuts.

 

[RonWB1957]

for run-out on a spindle, it was maybe 2 tenths from what i can remember. Table backlash was maybe 10 thousands, but then i haven't taken the time to adjust the nuts.

0.2" seems like a lot to me. Maybe I am not thinking correctly, but I was thinking maybe 0.02" or 0.002" run out. Are the hardened ways really worth the extra cost? Thanks, yet again.

 

[Muskt]

I probably shouldn't reply to someone else's statement; however, I will take a stab at it anyway.

Generally (not always, but) a non-machinist would refer to a "tenth" as 0.10 of an inch.
A machinist refers to a "tenth" as a tenth of a thousandth or 0.0001 of an inch.

If I messed that up, I shall crawl back under my rock.

Jerry in Delaware

 

[Dan_S]

A machinist refers to a "tenth" as a tenth of a thousandth or 0.0001 of an inch.

You are correct, this is what I meant!

Are the hardened ways really worth the extra cost? Thanks, yet again.

I think so, because they will wear slower, and thus extend the life/accuracy of the mill.

 

[RonWB1957]

Thank you. I am definitely not a machinist by trade and have more to learn than I will ever be able to. So thank you for answering my uneducated questions.

 

[Dan_S]

Thank you. I am definitely not a machinist by trade and have more to learn than I will ever be able to. So thank you for answering my uneducated questions.

No problem!