Search found 1152 matches

by RSG
Fri Apr 03, 2020 6:32 am
Forum: Milling Machines
Topic: High frequency vibration on Y axis
Replies: 15
Views: 298

Re: High frequency vibration on Y axis

Very interesting Spro
by RSG
Fri Apr 03, 2020 6:30 am
Forum: Milling Machines
Topic: Leadscrew lubrication question
Replies: 6
Views: 263

Re: Leadscrew lubrication question

LOL, good idea actually
by RSG
Thu Apr 02, 2020 6:59 am
Forum: Milling Machines
Topic: High frequency vibration on Y axis
Replies: 15
Views: 298

Re: High frequency vibration on Y axis

This happens to be a resonant frequency of Ron's leadscrew when it's sticking out about 10". Yes, when the vibration is happening you can really feel the leadscrew vibrate at the end albeit microscopically (for lack of a better description). As soon as you touch it the vibration completely stops. C...
by RSG
Thu Apr 02, 2020 6:51 am
Forum: Milling Machines
Topic: Leadscrew lubrication question
Replies: 6
Views: 263

Re: Leadscrew lubrication question

Thanks Pete! I know what you mean by oil draining into the sump. At the moment I'm not using the coolant system so it's ok but if you look inside from the opening you can see just how much oil is in there already after one year. One I am diligent about is cleaning sown way surfaces and leas screws o...
by RSG
Wed Apr 01, 2020 9:40 am
Forum: Milling Machines
Topic: High frequency vibration on Y axis
Replies: 15
Views: 298

Re: High frequency vibration on Y axis

Thanks John,

Interestingly that's about the length that sticks out at the point it resonates. Knowing that RPMs cause this and being able to tweak them accordingly should suffice for now. I appreciate your and Spros help immensely.

Regards
Ron
by RSG
Wed Apr 01, 2020 6:35 am
Forum: Milling Machines
Topic: High frequency vibration on Y axis
Replies: 15
Views: 298

Re: High frequency vibration on Y axis

The fact that it affects only the Y axis at one spot while cranking in one direction leads me to suspect that the Y axis screw itself is vibrating. What are the dimensions of that screw? Does it have bearings at both ends? How many flutes does that endmill have? The screw dia is approx. 1.25" and i...
by RSG
Mon Mar 30, 2020 4:57 pm
Forum: Milling Machines
Topic: High frequency vibration on Y axis
Replies: 15
Views: 298

Re: High frequency vibration on Y axis

Your mill has found a "harmonic". The slide is resonating to the motor modulation and yes, the screw will turn easier. There could be a lot of things; unbalanced pulley, bad belt etc. You already distilled it down to the more esoteric reasons. Very interesting Spro! I was wondering if that could be...
by RSG
Mon Mar 30, 2020 4:53 pm
Forum: Milling Machines
Topic: High frequency vibration on Y axis
Replies: 15
Views: 298

Re: High frequency vibration on Y axis

These - With or without the endmill cutting, so even when just cranking the handle. - Only during a specific operation using a 3/16" endmill to cut a slot. seem contradictory. Explain? Sorry, - With or without the endmill cutting, so even when just cranking the handle. Yes, sometimes it happens whi...
by RSG
Mon Mar 30, 2020 9:48 am
Forum: Milling Machines
Topic: High frequency vibration on Y axis
Replies: 15
Views: 298

High frequency vibration on Y axis

This is further to the leadscrew lubrication issue I had earlier and the reason why I investigated it to begin with. I am getting a high frequency vibration on my "Y" axis intermittently which is annoying. It gets worse when cranking the handle faster. It's almost like it gets vibrating to such a hi...
by RSG
Sun Mar 29, 2020 7:59 am
Forum: General Discussion
Topic: Homemade indexing head
Replies: 6
Views: 357

Re: Homemade indexing head

Looks good so far!
by RSG
Fri Mar 27, 2020 6:21 am
Forum: Milling Machines
Topic: Leadscrew lubrication question
Replies: 6
Views: 263

Re: Leadscrew lubrication question

Thanks Harold, I looked at the screw closely last night after cleaning it and it appears to be good as far as I can tell. There is more backlash (especially now it's clean) so I'll look at tightening the nut a bit to see if I can reduce it. It's not bad IMO but I'll see if I can get it better becuae...
by RSG
Thu Mar 26, 2020 12:20 pm
Forum: Milling Machines
Topic: Leadscrew lubrication question
Replies: 6
Views: 263

Leadscrew lubrication question

Hey guys! I've been using my new mill for the last year now and have been lubing the leadscrews on the y and x axis with grease because upon examination that's what it was shipped with. Stupid me, never read the manual to see they need oil and are connected to the "one-shot lube". Now (for the lack ...