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Lathe tool data, front edge angle?

March 18, 2019, 7:14 pm
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I'm trying to learn how to CNC, so bear with me.

Sandvik 124b f6m (DNMG)
Iscar MVJNL 12 3B K6M (VNMG)

This is what I can make out on this tooling. I can only find specs on the Iscar so far, but I don't know if it's the info I'm looking for.

It's got a -5.5 Rake angle axial and a -10.5 rake angle radial. (Don't know what these mean) In the tool setting file it ask for nose angle and front edge angle. The nose angle looks like the angle of the insert, so we got that and am having issues figuring out "Front edge angle" which in the little diagram shows the angle in between the back side of the insert I guess you can call it, and the part. Looking at the VNMG I would think it would be a lot more then 10 deg. Currently both are set to 1.0 and do work, but wonder what this really does.

Thanks,
Higgins909
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Modular short vises

March 18, 2019, 11:00 pm
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Looking to tool up a 4th axis rotary with some short in height around 2" or under modular vises.
The kurt serralock and versalock look pretty good. anyone using them how to they repeat? what about Jaw lift. jaws will be cut for the parts.

our parts are usually long and narrow and vari in widths from 1/2" to 3". most stock is ground to size and under 1" tall. we hold on anything from .050 thickness to .200

I am looking to mount them on 5.5" x 5.5" x 20" cubes length running the x axis supported via a A-frame I am thinking about 3-4 per per side on 2 sides(0º and 360º) and running the other 2 sides(90º and 270º) of the cube with 2 to 3 running the opposite way for machining end features.
I had made a few cubes way back when and only used one for a long running job I have like 4 or 5 more of them and got to thinking of mounting one with a few modular vise's. I also have a trunion to hold our 6" kurt double vise but most of the time we just use vises on the table cause running that on the 4th is a bunch of wasted space due to the length for 2-4 parts per operation

I like the fact that the movable and fixed Jaws are movable for different widths.
its there any other short modular vises like this?
I never used hydraulic vises do the repeat good also? as kurt has them in this style as well. can you get a very light grip on them so not to bend thin parts?

anyone got other ideas? we do use mitee bit clamps, but looking for a Vise/ Jaw system that I can move around with out re drilling and tapping holes for different sizes. parts are mostly alum and again mostly ground stock on 6 sides finished to outside dims. and I can always put on the other cubes for the mitee bite stuff.

Thanks
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machine input, leading edge industrial HX8610vmc Vertical Machining Center

March 18, 2019, 11:11 pm
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A friend of mine came across this converted mini mill from leading edge industrial, they want 4800$ it has the same weak motor , no ball screws and they claim 9000rpms on a spindle bearing that I believe is rated for 6500 or 7500 rpm. I thinks its too much for a machine that only has the enclosure going for it. Any thoughts? Leading Edge Industrial HX Series II - HX8610 Vertical Machining Center
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Finding chamfer diameter

March 18, 2019, 11:44 pm
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Hello just wondering if anyone can help me find the slip gauge diameter size and the trigonometry formula to work this out please, a chamfer angle of 34 degree going 2.5mm deep and the diameter of the bore is 12.1793mm. What size slip gauges should I use to check the overall chamfer diameter.a go and no go slip gauge.
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Hardinge VMC II with Geared Head - Shift Codes?

March 19, 2019, 7:15 am
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Running a job right now where it is shifting to low gear to drill a 7/16 hole in 1/8" alum, and then to high gear to run a 3/16 mill.
Taking too much time shifting gears when it's not needed, but I can't find the secret handshake to force it to stay in high.

Now I have the Siemens control, but if you have one with a Fanuc - it could possibly be the same M code?
So at least let me know what you use.

But hopefully someone has one with a Siemens.


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Think Snow Eh!
Ox
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Mori Seiki MV JR MX2 Parameters reset

March 19, 2019, 11:36 am
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Greetings
I just experienced a power blip ( electrical) that happened during a tool offset measurement. I have had power blips before and it scrambled my parameters.
I have a home shop and make my 3 phase power with a TEMCO converter.
This time I went through reloading all the parameters again only to find that it is stuck in a #35 tool change not complete. That would not normally be a problem except this time I can not home the axis. The X moves but does not home. The Y and Z won't move at all. I manually returned the down pot to it's home position and that cleared my tool # 35 problem. My 7000 parameters all had a 2 4 2 4 2 4... setting. I manually reloaded /cleared all of them.
And after all that on power up I got a CPU error. Then next time I did not get that however the Y and Z still won't move. I have checked Relays,connectors,fuses, parameters again only to find that the #7000's have 2 4 2 4 2

Example
#7000 2
7001 4
7002 2
all through the #7000 series.
What I would like to do is wipe the parameters and start from scratch.
I have a set of spare boards with minor problems but they will work to power it up.

In the cabinet there is a rotary switch for writing parameters and I believe some where in the past I was told to set the switch to 9 and erase the whole set.

Thanks for any help.
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RS232 Cable Splitting

March 19, 2019, 1:57 pm
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I'm in the process of upgrading our CNC communications system which is pretty old and many of the serial cables are failing. I've got the Moxa W2250A units setup but I'd like to install them inside the controller to minimize exposed cables and also to be able to draw power from the Fanuc controller using pin 25 which supplies +24V. From what I've read, this seems doable.

I'd also like to leave the female DB25 RS232 at the side of the machine should there be an issue with the wifi so we could send/receive programs using the old method (I would just leave the existing rs232 cable in the machine area).

I was thinking about getting an internal board like the picture attached but the company that produces them sells them as a kit and manufactures them at low volume. They're well over $200 for the board and some cables.
Click image for larger version.  Name: InternalRS232-board.JPG  Views: 17  Size: 27.1 KB  ID: 252633

So to save an on costs, I'm trying to just wire it up myself. I'm wondering, does anyone know if I can just use split the RS232 connection inside the fanuc controller, connect the split ends to the MOXA unit and the other split end to the external DB25 rs232 port, allowing for someone to attach a cable to it? I'm thinking this would work as long as both lines aren't being used to send data to the CNC. We'd also only be using one end of the cable for reading at a time.
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Tips on 3D surfacing ABS-like plastic

March 19, 2019, 6:13 pm
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Hey,

Fairly new to the whole machining world but I can run my machine no problem. I come from a 3D printing background. Some time ago, I decided to mix 3D printing to CNC machining in order to create complex parts with nice finishes. The complex part side is OK, the nice finishes side is still in the progress. Looking to get tips on CAM programming and right tools

So the plastic I am machining is PETG ( Glycol-Modified Polyethylene Terephthalate (PETG, PET-G) :: MakeItFrom.com ) It's similar to ABS on many sides and it can definitely be machined to nice finishes. I'm able to get really great walls on 2D contours. Where i'm struggling is on 3D surfacing. I'm using F360 and a combination of parallel and scallop tool paths with really small stepovers. Running harvey's 1/4 ball end mill with recommended settings which is about 0.0065 IPT and 1200SFM. There's no roughing passes because the part is 3d printed with a small stock to leave of 1mm. Oh, and i'm using a CNC kit similar to CRP. Check the machine and there's almost no backlash and try little deflection... Anyway there's not much tool pressure cutting this.

Any advices would be appreciated. I can post settings when i get to my work computer.

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Semi-manual Milling

March 20, 2019, 7:59 am
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I'm a hobbyist working in a definitely non-production environment, and I'm considering a CNC conversion of a Bridgeport mill. I am comfortable with CNC, since I've built a fairly large CNC router before, and I am familiar with the control setup, mach3, mach 4, etc. I also have plenty of tools to pull it off without it being janky.

My plan is cnc control the X and Y with ball screws, and the knee as my Z axis. I know this won't result in very fast plunge or retract moves, but Again, I am doing low-volume, and mostly need the cnc capacity for handling complex curves and helical hole interpolation.

Anyway, here's the real question: I am accustomed to using Fusion360 + Mach3 for my router, and on my router, I do manual tool changes. I know I can do the same things on the Bridgeport, but, because the bridgeport will be slower, and because my conversion leaves the quill unchanged, I was hoping that I could program in not just tool changes, but manual operations. So, if I have a CNC milling/drilling project, I could program a pre-drill location, have mach3 position the hole and then wait while I drill the hole, then put an end mill in, and then continue with a milling operation. I might also use this for tapping where it positions the XY, then I drill, hit continue, new XY, drill, etc. then the same with taps.

Has anyone else done this? what are the relevant G codes? would I just insert a "blank" tool change, perform the operation, and then a real tool change? could I write some kind of pre-canned routine for essentially going to a location and then doing nothing?

Has anyone ever managed to get Fusion360 to produce code like this?
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NM3 Meldas Lo Cycle Count

March 20, 2019, 9:42 am
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I work in a shop that owns a Tsugami NM3 NC machine with a Mitsubishi Meldas Lo system. Like the other CNCs I work with, it has a way to count the number of cycles that It has run. According to the manuals, there is a way to set the machine so that it stops after a preset number of cycles. I have not been able to figure out how to do that, and would appreciate any help on that.

What I need: Get the machine to stop after a set number of cycles

What I know:
1. The Meldas Lo system uses a "Cycle Count" switch in conjunction with an M30 in the code. If the switch is on, the M30 adds 1 to the cycle count and then repeats from the start of the program. If the switch is off, then the machine returns to the start of the program upon encountering the M30 and stops running.
2. After using the "Monitor" button and pressing the "Page FWD" button a couple of times, I can see the number of cycles under the line "REPEAT" which has two numbers formatted as such: [current cycle]/[set number]. Currently, when the numbers match such as 2/2 or 10/10, the machine keeps running and resets to 0/2 or 0/10.
3. I can change the number under repeat by pressing the "Set Up" button and using "Page FWD" I come to a field that allows me to change the number it uses for the repeat.
4. My code is set up as such at the end of the program:
M05;(stop spindle)
M09;(stop coolant)
M01;(optional stop)
M30;(end of program)

Again, any help is appreciated.
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Opinons wanted on Sharp Brand VMC's. Good, bad, ugly?

March 19, 2019, 4:10 pm
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A customer of mine asked for an opinion on this Sharp VMC SV-4328SX SV-4328SX | Sharp Industries.

I don't think I know anyone with one of these. I've seen Sharp brand bridgeports before. Anybody know anything about these CNC's? Good, bad or indifferent I appreciate the opinions.
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Fadal "R" Radius Rules

March 20, 2019, 1:02 pm
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I Have been looking in my manual and online (I could've sworn I saw it somewhere). What is the rule for using "R" in a G02 or G03 instead of "I & J". Is there a maximum and minimum degree for the "R"
Thanks
Kevin
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Fagor 8055T: Unexpected diameter change on second part

March 20, 2019, 2:32 pm
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Fagor 8055T on a cheesy Taiwanese flatbed lathe with Sauter turret. I run Gcode, not conversational.

Ran first part without issue.

Ran second part without issue except I noticed the initial cut on the OD and ID roughing tools seemed deeper than on the first part. Measured ODs and they were all .2" small. Measured IDs and they were .238" large. FWIW, finish OD 23.8, finish ID 19.0

Cog belt driven X axis screw. Belt jumped or servo motor mounted encoder malfunction??????

Manually brought tools to programed diameters as displayed on screen and the tools were out in the air, like they were where they were supposed to be.

I don't really know where to start looking.
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Smart lathe

March 20, 2019, 4:26 pm
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Has anyone heard anything or experience with the smart lathes thinking about one
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MP systems vr8 high pressure coolant.

March 20, 2019, 7:41 pm
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Does anyone have any experience with these units? I know absolutely nothing about them, but due to an ordering mixup looks like I'll be getting one.

We were supposed to get the Mikron unit that is designed for our 5 axis, however Mikron sent the 500psi unit instead of the 1000 as ordered. So my supplier decided to get us the MP system instead of waiting another 3 months for the Mikron unit. He said it's a far superior unit, but again I have no idea. I'm sure I can refuse and wait for the Mikron unit.

Any insight would be appreciated.
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Brother Speedio S300X1

March 20, 2019, 8:12 pm
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I'm considering buying a Brother Speedio S300X1 for small light prototype work. It just barely fits into the space I have available. Any feedback good or bad regarding this machine? Limitations? Concerns?
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Mori Seiki SL 300 Daikin Hydraulic power pack excessive overheating

March 21, 2019, 1:16 am
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Question Mori Seiki SL 300 Daikin Hydraulic power pack excessive overheating -
Hi Guys - It`s my first post hope someone has some experience of Daikin NDR 151 Hydaulic motor pack, running on a 1997 Mori Seiki SL 300 A.

Its overheating to a point where it`s melted the pressure gauge.
Had it stripped down, replace oil several times ran with & without new oil strainer, & deep cleaned heat exchanger. We`ve also checked external hydraulics & valves & no obvious obstructions, or underlying faults.
Ran it by linking hydraulic hose straight between Pump to tank & it runs fine. There`s no obvious wear on the swash plate & pistons.

Has anyone experience with these, is there any adjustments or checks we use to determine the problem.

any help really appreciated.
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Centroid X and Y Location issues

March 21, 2019, 8:48 am
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I recently obtained a Centroid CNC Milling machine, serial # is 20528, the machine model is M400S, it has a centroid M-series controller and the system ID is 1018051077. I've been working through programming my first part and established XYZ zero and when I go to run a program it runs shifted from where I established XYZ zero. I bought this machine used and I'm guessing it is a setting somewhere that causes it to offset but I'm not sure what would need to change to have this reference from the zero I establish.

I suspected that I may have incorrectly established XYZ zero and tried again while positioning the part on the opposite side of the vise. The program ran offset from what I established as XYZ zero by about the same amount as the first attempt. I look forward to your thoughts and help with this. Z zero seems to be correct, X and Y are off but it may just be a setting I'm not familiar with. Any direction or advice on overcoming this issue is greatly appreciated.
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Is anyone auto tapping in a Prototrak?

March 21, 2019, 10:46 am
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We want to try using a tapping head in a Prototrak bed mill with a AGE3 control. The control doesn't know the speed of the spindle so we'll have to estimate it and the feed accordingly and hope it matches. My proposal is to program conservatively on the feed with a boring cycle and adjust the spindle speed or the feed as necessary. We'd be changing tools and spindle speeds during the cycle, so it might be best to verify the spindle speed with an IR tach each time.

We've done it in the past using 2D programs and manually operating the quill. We'd like to power drill the hole operations using 3D, but trying to do that then manually operating the quill for the tapping head causes the control to error out as soon as the quill is moved - that's why we want to try powering the tapping head in and out. The tapping head is a CNC model with equal in and out speeds.

Or is there a way to interrupt a 3D program and manually tap each hole?

Anyone here done this already? Have any tips?
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Running a custom Mcode in the background?

March 21, 2019, 1:58 pm
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Hi all. so I'm fairly new to macro programming in general, but I find myself in need of some help. I'm trying to emulate the Haas spindle speed variation that they use on their lathes...but on a mill. I have a macro that works to vary the spindle speed and will run indefinitely, but I'm having a hard time figuring out how to make it run in the background while the main program code executes. I'm sure there must be a way to do this in a while loop, but for the life of me, I can't seem to think of a solution that works. Ideally I'd love to apply my program to a custom mcode (I know how to do that) so I can use it on a few different programs and have another mcode that cancels it.

Any thoughts or tips would be appreciated. Thanks.
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