#ballbar testing

[samautomation]

Renishaw QC20 W Wireless Ballbar - A powerful tool for machine tool  performance diagnosis

[cnsyil]

Today we did accuracy compensation and ballbar test for SYIL 7 Epoxy Granite. The results are very good. After laser compensation the X axis repeatability at 0.001mm’position accuracy at 0.002mm! Y axis repeatability at 0.0008mm’position accuracy at 0.001mm! Z axis repeatability at 0.001mm’position accuracy at 0.002mm! Ball bar test at 6.4 μm. Whether you need a standard 3-axis CNC Milling Machine, a powerful Compact Vertical Machining Center, or a Small VMC for precision machining.The Syil 7 Personal CNC Mill (PCNC) is a new approach in Small CNC Milling Machines,4 and 5 axis function.An Affordable CNC Milling Machine designed for real machining work with the power to cut serious materials. #CNCmilling #CNCMills #Machining #CNCMachining #Machinist #Machinecenter #SmallCNC #Instamachinist #CNCMachiningparts #CNCMillingmachine #Machineshop #PersonalCNC #Workshop #SmallCNCMachine #CNCMachinecenter #Machiningcenter #Smallmachiningcenter #HobbyCNC #HobbyCNCmills #HomeCNC #EducationCNC #SYIL（在 SYIL - Affordable CNC Machine Tools） https://www.instagram.com/p/B-TvQU_J-aG/?igshid=1vp2qc5f87q8q

[chengcg888]

Skills of Keeping Strict Tolerance Requirements in CNC Precision Parts Machining

In CNC precision parts machining, there are 6 crafts that maintain strict requirements of the government. CNC machining machineries are quite fond of seeing such equipment: +/-0.005 “. Five thousandths of an inch is an exercise for any good mechanic – they might as well close their eyes and grind them. But those jobs are more demanding. Add another zero, and now you have: 0.0005 “. Holding five tenths of you is a totally different story. This is the difference between the thickness of human hair and white blood cells. When it comes to strict government service, here are some suggestions to maintain your spare parts specifications.

1. The spindle warms up to maintain critical tolerance

Running a Warm-up Program – Although this is a standard program for numerous CNC machines, there are some more troublesome things to study and run. A typical program will only preheat the spindle, which is critical for smoothing grease to prevent premature bearing wear. However, you also need to get the internal components to a stable working temperature to cope with thermal expansion. Now, if you only want to maintain strict government service on the Z axis, all of this is accurate, but if you combine the preheating of the spindle with the movement of the machine tool on the whole axis, it will help to go a step further. The machine is allowed to run for 10-20 minutes, and all parts are allowed to move to the desired temperature, which will help reduce the thermal expansion effect of milling time. In any case, at the end of the warm-up, ensure that all equipment is accurately measured and that strict military service is maintained.

Tool selection may be a factor in maintaining a strict bureaucracy. Rough processing equipment is used to carry out “rough processing” so as to reduce the wear of finishing tools and maintain accuracy.

2. Equipment Selection for Maintaining Tight Military Service

Choose your equipment carefully – when you deal with these intolerant ministries, be sure to fit your equipment. You need to ensure that you have specific equipment for roughing and finishing so that the roughing cutter can accept wear and tear, while the finishing cutter only saves one process, thus ensuring the repeatable process of creating accurate parts.

3. Strictly Tolerated Compensation

Compensation for your equipment – equipment manufacturers are not happy, so they design equipment a little tolerant. They know that if you use their equipment to do something, you’ll be even happier if its reduced performance comes out of too big a size instead of too big a size. It’s like shaving: you might as well take a rest, but you can’t put it away. Knowing this, you need to make sure that the first thing you do when configuring an accurate job is to dial your essential device diameter. You may as well finish it in a variety of ways, but my preferred way is to milling a feature, and then use accurate equipment to verify the size. Easy – If you insert a 0.236-inch tool into a 0.250-inch hole, only a 0.248-inch measuring pin can be inserted, then your tool size will be reduced by 0.001 inches (because the size of each side can not be small, so use half value).

4. Maintaining the Temperature of Tight Yards

Thermal stability – This is one of the most important things on the list, because it can make a huge difference and you may not even notice it. Please pay attention to the location of your mechanical location. Is it near the window, if so, at some time of the day, where is the sunlight mapped on it? Does the air conditioning system start in the afternoon and cool in the cabin? Does your raw material remain in a stuffy warehouse and then enter a cold 68 degree environment? It looks innocent, but it will be yours. Great difficulties have arisen in the process. The thermal expansion or contraction of milling machines or cutting materials may vary greatly during your processing. Put all of this in lock-in – maintain your machinery and materials in a temperature-controlled climate, free from sunlight, and you will reap rewards – universality in your process.

5. Maintaining the Calibration of

Tight Military Service

Calibrate your equipment – when you’ve done all of the above, but all you need is * that * more rigorous, research on phone calls from manufacturers. When a machine is built, transportation falls off the truck, moves, stabilizes, and uses thousands of hours, things will be transferred and handled. This is unpredictable. Fortunately, there are several pieces of equipment, whether granite blocks or Renishaw Ballbar, that can help to loosen the mechanical reins to help maintain the corvee. We like to have a club test and adjust it as part of our annual care so that you can maintain a close relationship with mechanical accuracy. Otherwise, the implementation of these annual services can ensure that the bearing is tightened and smooth, the belt is properly tightened, and the drive motor runs well – these are important factors for accurate processing machinery.

6. Linear scales for maintaining tight government service

If all fails, scales! – If you’re still doing all the work on this list and trying, it might be time to study using linear scales to get machinery. Your typical CNC machine tool will use the drive motor encoder as the key way to track its absolute position, but this may be due to the shortcomings of ball screw or temperature difference. Linear rulers change all of this – usually installed in the factory, they consist of two key parts – rulers and reading heads. In short – scales are like machines that can read with high accuracy.

[eurekamfg]

Tolerances In CNC Machines

Holding High Tolerances in best CNC Machines:There are couple of things that a mechanical engineer loves more than when they get a print and see this: +/ – 0.005″. Holding five thousandths of an inch is a piece of cake for any great mechanic – they should process the part with their eyes shut. In any case, at that point there are those employments that are more requesting. Include another zero, and now you have: 0.0005″. Holding five tenths of a thou is an entire distinctive story. It’s the contrast between the thickness of a human hair and a white platelet. 

With regards to holding tight resiliences, here’s a couple of proposals that can keep your parts in spec.

1. Axle Warm Up for Holding Tight TolerancesRun a warmup routine – While this is standard method with most CNC machines, consider running something more strenuous. A commonplace technique will just warm up the shaft, which is basic for spreading oil to avert untimely bearing wear. Be that as it may, you additionally need to enable the inside segments to achieve an unfaltering working temperature to represent warm extension. Presently, the majority of this is fine in case you’re just hoping to hold tight resiliences in your Z pivot, yet in the event that you consolidate the axle warm up with machine development in all hub, this will help significantly further. Enabling the machine to keep running for 10-20 minutes with all segments moving considers the parts to achieve a perfect temperature, and will help moderate the impacts of warm extension amid processing. Regardless, toward the finish of your warmup, try to quantify every one of your devices for outright exactness and holding tight resistances.

2. Apparatus Selection for Holding Tight TolerancesPick your apparatuses painstakingly – When you’re managing these unforgiving resiliences, make sure to be obliging with your tooling. You’ll need to make a point to have particular instruments for roughing and wrapping up, the roughing apparatus to take the brunt of the wear, while the completing device is put something aside for just the last passes, will guarantee a repeatable procedure for making exact parts.

3. Pay for Holding Tight TolerancesRepay your devices – Tool makers aren’t impeccable, so they design their instruments to be a bit of pardoning. They realize that in case you will make something utilizing their instruments, you’ll be a ton more joyful if the component it removes goes under dimensioned rather than over-dimensioned. Much the same as a hair style: you can take more off, however you can’t return it on. Knowing this, you’ll need to ensure the principal thing you make when setting up an exact showing with regards to will be to dial in your genuine device distance across. You can do this few ways, yet my favored technique is to process an element and after that utilization exact apparatuses to confirm the measurement – gage sticks or pieces function admirably for this. It’s simple – in the event that you insert a 0.250″ gap with a 0.236″ apparatus and just a 0.248″ gage stick will fit, at that point your instrument is undersized by 0.001″ (utilize half of the incentive since it is undersized on each side). You would repay your size to 0.235″ now, either through your CAM programming or using Tool Comp charges in your cut document.

4. Temperature for Holding Tight TolerancesThermally Stabilize – This is a standout amongst the most imperative things on this rundown for holding tight resistances since it can have an immense effect and you may not see it. Focus on where your machine is found. Is it almost a window, provided that this is true, does the sun sparkle on it amid parts of the day? Does the AC kick on toward the evening and blow chilly air on the machine lodge? Is your material kept a sweltering distribution center, at that point brought into a crisp 68° condition? These all appear to be blameless however can make a tremendous cerebral pain in your procedure. Warm extension or compression of the processing machine or the material you cut can make huge differences in your procedure. Put these all on lockdown – keep your machine and material in a temperature controlled atmosphere, unaffected by daylight, and you will receive the benefits – consistency in your procedure.

5. Alignment for Holding Tight TolerancesAlign your gear – When you’ve done the greater part of the above however you require it to be simply *that* considerably more tightly, consider bringing in the maker. After a machine has been assembled, sent, dropped off a truck, moved around, leveled, and utilized for a great many hours, things will move and settle. It’s unavoidable. Fortunately, there are a few bits of hardware, be it stone squares or the Renishaw Ballbar, that can help pull the reins in on your extricated up machine to help in holding tight resiliences. We get a kick out of the chance to play out a ballbar test and make modifications as a component of a yearly support, that way you can keep a tight chain on your machine exactness. Additionally, playing out these yearly administrations guarantees that course are tight and greased up, belts are legitimately tensioned, and drive engines are sound – immensely imperative factors in having an exact machine.

6. Direct Scales for Holding Tight Tolerances As a last resort, scales! – If you have done everything on this rundown, regardless you battle, it might be a great opportunity to consider getting a machine with straight scales. Your run of the mill CNC machine will utilize the drive engine encoder as the essential strategy for monitoring its outright position, however this can be defective because of flaws in the ball screw or warm errors. Direct scales change all that – commonly introduced at the industrial facility, they comprise of two primary parts – the scale, and the read head. Put just – the scale resembles a profoundly exact ruler that the machine can read, always contrasting and altering for deviations. On our M10Pro, this takes into account a 25% more tightly situating resistance, a 20% change in repeatability, and a 85% lessening in kickback.

[rajero-blog]

The one major issue I had with the oldest machine in my line up was the coolant the previous owner used. Yes it was good for brass and the materials he machines but horrible for corrosion.. these four bolts held the Y axis onto the linear bearing block. Originally I thought I would only be able to get a couple out without completely taking the machine apart.. As you see in the picture I was able to get all 4!!!!! Time to reassemble. While we had it all apart we ran a few test.... BallBar results in future post!!!! With 10,000 hours what is your guess at the results ??? (at Columbus, Ohio)