My first mill: induma 1s

[keen99]

You might be mistaking the clutch action as stripped gears and that is adjustable to an extent.

yes!



pulled the quill feed clutch apart after I found a spec for quill pressure (200lbs on the quill - measure it using the handwheel to feed the quill down to a scale). Adjusted it up from "unmeasurable" (kicked off with <5lbs) and got it to max out about 60-70lbs. that's with the spring fully compressed in coil bind, though.

teeth are a little beat up, but dont look horrible. I could do 200+ with the quill lever without issue, and I can see the clutch being the disengagement point.

any ideas?

 

[keen99]

I'm thinking it looks like clutch and gear time. I backed the spring out completely and shimmed the lever for testing, and was able to get the _occasional_ engagement around 220 (didnt try to adjust back down), with a lot more frequent releases at 60-100lbs.

update: after a bunch of fiddling (and remembering to engage the feed to test it) I managed to get it to be pretty consistent above 160lbs, and sometimes 260+ (my scale stops at 260). The induma manual specifies 350lbs now that I know where to look.

the bracket that holds the end of the of the arm (different than the built in bracket on the bridgeport cover) is pretty abused, and might be part of the problem. I might order a BP cover and arm assembly (different angles) at some point.....

 

[Provincial]

Is there a spec on the spring strength on the quill feed clutch? A weak spring would give the symptoms you describe. X number of pounds at a given extension length. Someone could have replaced the spring with a weaker one, too.

 

[Technical Ted]

If you do FaceBook, there is an Induma site for an additional resource:

Log into Facebook

Log into Facebook to start sharing and connecting with your friends, family, and people you know.

www.facebook.com

Ted

 

[keen99]

Is there a spec on the spring strength on the quill feed clutch? A weak spring would give the symptoms you describe. X number of pounds at a given extension length. Someone could have replaced the spring with a weaker one, too.

Not in any of the documentation I've found - best I have is this, which is worded similarly to the BP service manual:

Power feed should be used for boring and drilling up to 3/8" diameter drills.
Use manual feed for anything over 3/8".
Overload clutch is set at factory to hold up to 350 Lbs. down pressure on quill, which will accomodate drills up to 3/8" diameter.Caution: this clutch should not be tapered with in the field.

And thanks Ted - I'm a member, but it's a pretty small group.

 

[OTmachine]

Looks like the gear teeth could use a good cleaning & check for fit-up. The spacer may be too thick.

 

[keen99]

lets see - some catch up!

2 VFDs hooked up, controls built (added a slow/rapid to the power feed using the VFD), everything rewired.



tach sensor for the control box and for the DRO installed - sadly the one on the controls doesnt work, worked fine testing it unmounted, so it might be the VFD interfering? I dunno. happily the DRO tach works perfect.



x/y/z scales mounted for the DRO. the Z was particularly painful because there's nothing flat on the side of this machine. ended up taking a page from Ted on the Induma facebook group and mounting it to a piece of steel stock with 4 leveling bolts, indicating that in, then tweaking the scale.

I still have a quill scale to add at some point, but that's going to be a lot more work.



adjusted gibs.

power feed clutched out very easy (even with the gibs loose or even removed...), which lead down into that rabbit hole of previously damaged parts. picked up a bridgeport version of the clutch, which grabs _too_ much, tried and failed to cut a new key slot in the hardened shaft (for the clutch) because the old one will not come out and is sheared and lets the new clutch spin. all I can do is break and burn endmills on this (even a center drill will make a oil puddle then goes flat), so my milling experience is not leveling up.

 

[7milesup]

Is that a HSS endmill or carbide? It definitely needs carbide for that task.

 

[toprecyler]

How fast was were you turning the end mill? Slow it down as much as you can or in the 50-80 RPMS and try it again, especially with HSS.


Sent from my iPhone using Tapatalk

 

[keen99]

Is that a HSS endmill or carbide? It definitely needs carbide for that task.

HSS (2 flute center cutting). I'll try carbide, let me track something down - the lathe I picked up came up with around 100 mostly new old american HSS mills....but nothing I can identify as carbide.

How fast was were you turning the end mill? Slow it down as much as you can or in the 50-80 RPMS and try it again, especially with HSS.

I tried it all through the range (the last try was ~3k, which is about max after finding recommendations for very high rpm for this) - though I didnt get down below 100rpm I suppose. I could try - it's still setup.