Search found 199 matches

by choprboy
Mon Jan 21, 2019 10:42 pm
Forum: Milling Machines
Topic: What is this CAT40 tool?
Replies: 13
Views: 933

Re: What is this CAT40 tool?

Basing on what I have plans to make out of a morse taper stub... someone's custom spade drill bit holder? The screws being the alignment pins and the large hole for a set screw to lock it in place?
by choprboy
Mon Dec 24, 2018 8:14 pm
Forum: General Discussion
Topic: What are these kind of taps called?
Replies: 11
Views: 961

Re: What are these kind of taps called?

Well... the are 3 basic tap thread taper/chamfer: Taper, Plug, and Bottoming. The more taper the easier it is to cut (less cutting force on each tooth), but the longer it takes and less efficient the cut.The tap in your description is a bottoming tap. The number threads in the taper varies a bit man...
by choprboy
Mon Dec 10, 2018 10:49 pm
Forum: Home Shop CNC
Topic: How easy to add USB to a 1993 hass lathe?
Replies: 8
Views: 761

Re: How easy to add USB to a 1993 hass lathe?

I don't have a Haas, but at one point I had done some research when I was thinking about getting an old one to play around with (still don't have the time or space...). Apparently it is pretty easy to convert one, as long as the Haas had the floppy drive option installed. You just replace the floppy...
by choprboy
Sun Dec 09, 2018 8:27 pm
Forum: Milling Machines
Topic: Diagnosing a Milling Machine problem
Replies: 26
Views: 2473

Re: Diagnosing a Milling Machine problem

... I also notice that this cutter in this particular collet seems to be out of round. In other words, when I spin the tool in the collet (not in the machine) I feel alternating tightness and looseness between the two. This different than all the other collets and cutters. Maybe one is out of round...
by choprboy
Sun Dec 09, 2018 1:45 pm
Forum: Milling Machines
Topic: Diagnosing a Milling Machine problem
Replies: 26
Views: 2473

Re: Diagnosing a Milling Machie problem

1) Chip stuck in the collet gap?
2) Actually a 15mm endmill, or a 16/17mm collet?
by choprboy
Mon Nov 12, 2018 8:47 pm
Forum: General Discussion
Topic: Dykem Layout Fluid Issue
Replies: 5
Views: 1102

Re: Dykem Layout Fluid Issue

Interesting... Is the entire thing clear, or has the blue bunched up, like the surface had been waxed? Looking around, there are a couple reasons that could cause it... but they seem highly unlikely. The blue in Dykem is methyl blue, a pH indicator. It will turn yellow under strong acid conditions (...
by choprboy
Mon Nov 05, 2018 12:50 am
Forum: General Discussion
Topic: Shop realities
Replies: 68
Views: 6820

Re: Shop realities

I don't really know how CFM are measured. I never really thought about it. I guess it must be the pump output, not the flow at the hose end, since any pressurized container will release gas at the same rate through the same size nozzle. Compressor pump output is nominally measured at standard atmos...
by choprboy
Sun Oct 21, 2018 11:40 pm
Forum: Home Shop CNC
Topic: Anilam Crusader M 3 Axis Mill will not boot up.
Replies: 3
Views: 1003

Re: Anilam Crusader M 3 Axis Mill will not boot up.

No idea and a quick search shows lots of similar issues and not much debug information. It sounds like a power supply problem. Probably best to start with standard electronics debugging and identify/measure all of the individual power rails on each board.
by choprboy
Sat Sep 08, 2018 3:49 am
Forum: General Discussion
Topic: Can a delta-delta transformer be backfed
Replies: 8
Views: 942

Re: Can a delta-delta transformer be backfed

It depends... and would pretty hard for anyone to give you an answer without more specific information. A delta-wye transformer would generally not be corner grounded on the input (delta) side. The wye side, or basically any output configuration with a derived neutral, would require grounding on the...
by choprboy
Fri Sep 07, 2018 7:38 pm
Forum: General Discussion
Topic: Thru-Hole Tap for 316 SS
Replies: 4
Views: 629

Re: Thru-Hole Tap for 316 SS

For one, a good quality tap is miles ahead of a general hardware store hand tap. The cutting edge should be razor sharp. I like OSG as a manufacturer. Even better, spiral flute taps are amazing, lifting the cuttings right out of the hole as you tap. But spiral flute taps are more fragile than hand o...
by choprboy
Sat Sep 01, 2018 9:26 pm
Forum: General Discussion
Topic: unique water pump
Replies: 55
Views: 4445

Re: unique water pump

The skin effect is negligible up to a few hundred kHz or very large wire sizes. At 60Hz, the skin effect is roughly 8.5mm deep (1/3"), so there is negligible loss in conductor below 17mm (2/3") in diameter.
by choprboy
Fri Jun 22, 2018 9:13 pm
Forum: General Discussion
Topic: not how they teach you to do it in school
Replies: 11
Views: 2152

Re: not how they teach you to do it in school

Better than a spiral point (gun tap), is a spiral flute tap. I do 12mm power taps in the drill chuck of my mill all the time. Takes a bit of experience, but get everything lined up and make sure you have enough quill length for the hole, turn on the motor and let the tap gently drop into the workpie...