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I'm attaching a photo of the turret nameplate. I'll look for the machine nameplate tonight. Thank you for your reply.

Hey guys, I've had this machine for about six years. It has run pretty good for me. Last week, the turret stopped aligning. I get a "Turret not rotating" alarm. But the turret does rotate about 5...

Hey guys, I have a 1996 Mighty Comet 500 with Mitsubishi 520 control. I bought it used and it has sat many years. Bringing it online, I noticed it has two lube pumps and it appears that one feeds the...

Hey guys,
Please message me if you know of a Hurco TM8 for sale that is not already on Ebay or machinetools.com

Regards,
David Reagan

Just a follow up. I purchased a realtime board from Ebay (3-424-2400A01) which appears to be a new part number in the past two years. It works great and now I still have my old realtime board so I...

Maverick,
I'm not sure why my messages would show full. I don't have any. Please email me at [email protected] I am about to send my RT board into Siemens for repair.

Regards,
David...

Thank you for your response Maverick. There is only one bank of about ten fuses in the entire control enclosure and I checked them all. Friday night, the control had been on for 24 hrs and the...

Gentlemen,
I own a Mighty vertical machining center model Mustang C-42, new in June 1999 with Vickers 2100 control, which I love except at times like this. I got a fault tonight that would...

I have a feeling your first endmill had a much better than average gash/center cutting feature which tolerated a really high plunge rate all this time. Also, 5% is low concentration for aluminum in...

That sounds like an odd failure mode. Is the screw well oiled when this happens? Are the rapids possibly exceeding the rating for that ballscrew?

I know you said same brand and mixture of coolant, but have you checked your coolant concentration with a refractometer? Are the endmills galling and then breaking or just snapping with no adhesion...

Ken,
I am interested in the ST-10 and ST-20 as well. I would like to know how the ST-10 did pushing the Komet 1.75" insert drill in 4140.

Regards,
David Reagan

David,
The speed charts you get with endmills and drills are good to study. Both vary with different materials. SFM is the "surface feet per minute" and I like to remember the base...

Hello,
I saw your post and no replies. I was wondering what you experience was 4 months ago with the A514 material. The Rockwell C hardness is 25-30, so that's reasonable to cut, but I have...

Hello,
I have a few thoughts. From my recall, your tap drills for 3/4"-10 and 7/9"-9 are small, which will make the tapping torque and stress go way up. 21/32" is the standard tap drill for...

Should be no problem. I don't know about your cam system, but you can just use normal G code as well. Your radius will be your major diameter minus the cutter diameter divided by 2. G3 is a...

Why take the spindle out? Just mount the laser a little below it and save a bunch of time and the machine can still cut later if you want. You could just unplug the coolant pump and look for the...

Ok, got the photos hosted. Here is a link to the album. You can see the original damage part and the new one coming into shape. It was run with soft jaws and has 30 teeth equally spaced. I went...

LOL. I'm not in the class. Is this a class only discussion? Looks like that link didn't work. I made this completely on a CNC mill, no lathe. I programmed it in basic G code at the panel.

http://tinypic.com/r/125jpr9/3I work with aluminum, mild steel and some alloy like 4140, 6150. Nothing nasty on a regular basis. I'm not sure I understand your question. What am I making this week...

Those slide rules are cool, but there are some basic numbers that cover most normal materials. 65 sfm for drilling steel, etc. The sfm formula isn't that hard to run. 3.82* sfm/diameter of cutter...

It's a pain until you know them without even hitting a calculator.

Those formulas are some of the most powerful I learned in engineering school. Notice the deflection being a function of the cube of the length. So for any given endmill, if you hang it out twice as...

Drill a starter hole. Even center cutting endmills are not happy plunging and the thrust is more than you'd expect. If you don't want to drill, try plunging at .0002" per revolution and see if you...

A36 is just mild steel, almost synonymous with 1018 hot rolled, but with a minimum yield tensile strength of 36,000 psi. One thing is that square and rectangular tubing made with it has a weld that...

This page has all you need. The Mobil Vactra #2 should be good for the ways and screws. I use Oakflo DSS800 in my CNC mill and it's great for all materials. I doubt you'd want 5 gallons of...

No spot drill. .261" Screw machine length drill can drill 1.1" and does not walk like a jobber drill. I'd go 400 rpm with cobalt split point drill, flood coolant with preferably soluble oil not...

That makes no sense. You are pushing a .242" drill just fine right? The difference between .242 and .261 is 8%. Do you have a split point .242 and only a chisel point old style .261"?

Why center drill, drill .242 and then drill .261? Drill right to .261 Real oil on the tap and the new speeds are much better.