The 20 mm linear guide rails have a hole distance from center to center of 60 mm.
The 20 mm round rails have a hole distance from center to center of 150 mm.

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Can anyone tell my the exact center to center mounting hole distance on the 20mm linear guide rails? I have done some measuring but I am afraid they vary.

Yes, however, if you are needing a length of the HIWIN specification rail longer than our 78" max length, then you can abut more than one rail together to increase the length of the rail. We do this for our long X-Axis travels on our Fabricator pro machine.

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I would like some longer HIWIN rails and ballscrews for my x-axis, 9 feet or 108 inches. You list maximums as 78 inches.

The two main constraints on siting cellular base stations near residential areas are government exposure limits and local zoning ordinances. Various governments have limits for human exposure to radiofrequency (RF) energy that must be complied with in the siting of cellular base stations and other transmitters. In the United States, the relevant limits are those of the Federal Communications Commission (FCC). Cellular base stations use low-powered transmitters, and RF signal levels are invariably below FCC limits at any distance more than a few feet from the antennas. Thus it is entirely feasible to locate cellular base stations on rooftops of apartment buildings and to locate communications towers within residential areas and indeed these are both common practices. Local zoning ordinances are a different story. Local governments commonly restrict the location of communications towers through zoning ordinances, and they may have provisions that restrict cellular base stations in residential districts. Local attorneys or government officials should be consulted for advice about local requirements, which vary greatly among jurisdictions. Kenneth R. Foster Professor, Department of Bioengineering University of Pennsylvania

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THERE ANY STANDARD FOR A DISTANCE BETWEEN CELLULAR BASE STATION AND RESIDENTIAL AREA?

Yes, you can send your electronics to us for repair, or retrofit to work with either Mach3, Mach4 or LinuxCNC. You can send us an email at customerService@buildyourcnc.com to set up your appointment.

Some of the types of CNC electronics we will consider.

- We will work on electronics from other manufacturers as long as you are ok with the Mach3, Mach4 or LinuxCNC control software for your CNC machine or CNC router.

- We will repair or retrofit used CNC electronics.

- Some customers find that electronics are overwhelming to put together so we will finish these electronics wiring and assembly for you.

The cost for these includes labor cost for the time it takes to finish the CNC electronics repair or retrofit and for any parts that need to be replaced or added.

Here is an example of CNC electronics that we worked on for a customer:

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Can I send used CNC electronics to you for a retrofit?

Select the desired rail here:
https://buildyourcnc.com/Item/mechanical-rails-HIWIN-Linear

On the product page, enter the total "cut to order" length (in inches). Then call us to specify the cut lengths. Remember that our maximum length is 2000mm or 78.74 inches.

Our phone number is located at the top right of each web page by hovering over the "Need Help?".

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how do I order multiple lengths of HIWIN guide rail with blocks?

Absolutely. The working area can be as long as 12 feet.

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[288] Is it possible to get a longer working area?

Cellular phones are designed to be safe for both the user and anyone standing nearby. Cellular phones are actually small radios that transmit signals to and from base-station antennas located on towers or buildings in the nearby neighborhood. Cellular phones use low-power radio signals, even weaker than CB, police, or fire radios.

The American National Standards Institute (ANSI) sets safety standards for human exposure to radiofrequency (RF) electromagnetic energy in the United States. Government agencies such as the Federal Communications Commission (FCC), the Occupational Safety and Health Administration (OSHA), and many states recognize and accept the ANSI RF safety standard. Also, the United States standard for RF energy is comparable to those set in other countries.

Cellular phones and cellular-phone base stations have been shown to meet these RF safety standards. Safety standards for RF energy are threshold standards. Threshold standards define the level of RF energy above which there may be health or safety hazards and below which there have been no reported harmful effects. Unlike ionizing radiation, which many people believe to act cumulatively even at small exposure levels, RF energy at low levels is not considered a cumulative hazard. Therefore the consensus of scientific experts in this area is that RF exposure from cellular phones, meeting the threshold levels set in safety standards, is safe for all.

The specific answer to the question is that cellular phone technology is safe for all. There is no danger posed by either handheld phone units or by base-station antennas. In both cases, the radio signals transmitted from the antennas are required to meet the ANSI safety standard for RF safety as embodied in FCC regulations governing this technology. For more information:

The FCC has recently revised and reissued its Bulletin 56 on Questions and Answers about Biological Effects and Potential Hazards of Radiofrequency Electromagnetic Fields.

OSHA provides information and links to more sites on RF safety at its Web page, Radiofrequency/Microwave Radiation.

Gary Zeman, ScD, CHP Lawrence Berkeley National Laboratory

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IT MORE DANGEROUS STAY FOR ONE HOUR AT A TEN-METER DISTANCE FROM CELLULAR ANTENNA OR TALK INTO PHONE THE SAME AMOUNT OF TIME?

Purchase the total length of the product that interests you (i.e. the linear bearing guide) and call us to inform us how you would like it cut. The phone number is located at the top right of each web page by hovering over the "Need Help?" message.

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How do I specify multiple quantities of custom cut lengths of the linear bearing guide?

Yes, you can order replacement wooden parts, but since we don't have them as products on the website, you will need to call us directly using the number at the top right corner of the website by hovering over "need help?"

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Is there any way i can order replacement wooden parts for a cnc machine

Yes, you can use these flexible strip brushes and create a mount for the contour that you need:

https://www.buildyourcnc.com/item/strip-brush

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Are there contour type brushes available for leadscrews and round rails

An end mill smaller than 1.5mm or 1/6" is too small a diameter for end mills to cut through materials that are thick. A good rule of thumb is if the end mill has a cutting length that is more than what you want to cut, that diameter will be acceptable.

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CAN .7MM END MILL BE USED TO CUT THROUGH 15MM MDF?

The HIWIN rail we stock are part number HGR20 series. 20mm guide length.

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What are the Part numbers / specs for the HIWIN Rails? HG series? RG Series?

Yes, we can provide tube fittings for a water cooled spindle. Call us between 9:00am to 5:00pm Cental time and we will help you get this product.

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I need a water connection fitting for 2.2 water cooled router can you help me

There may be many ways to do this. My recommendation would be is to add an encoder to the shaft of the existing motor and connect that to a servo controller so you have closed loop control. This way, you have the torque from the pulleys in the top of the drill press.

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how can I convert my orinary drill press to a servo drill press?

To use a touch plate on any controller, all you need is a conductive flat material with a known thickness and some wire and alligator clips. Solder a wire to the touch plate and connect the other end of the wire to the free input terminal of the controller. Connect a wire with an alligator clip to the ground of the controller (on the Mach3 USB controller, this ground is the DCM terminal, or the digital gnd on the 24VDC power supply). Connect the alligator clip to the end mill.

You can either use a script to serve as the probe, or you can use the ref all home button and setup the touch plate as a home switch.

Additional Information:
I connect wire to cmd- and to in2. I cant getbit to work, what arecthe corresponding ports and pins to usenin mach3? Please help.

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Hello, Can I hook up a Z axis touch plate to the usb controller?

An end mill smaller than 1.5mm or 1/6" is too small a diameter for end mills to cut through materials that are thick. A good rule of thumb is if the end mill has a cutting length that is more than what you want to cut, that diameter will be acceptable.

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CAN .7MM END MILL BE USE TO CUT 15MM MDF?

I like to use a 3/8" drill bit to create the holes on a table to mount the rails to give the rails a bit of wiggle room to adjust the alignment of the rail.

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Attaching the aluminum rails to the table. Do you use a 1/4" or 5/16" drill bit?

CP+ to COM
CP- to STEP
CP+ to CW+ (small jumper wire)
CW- to DIR

Additional Information:
If the driver does not have CP or CW labels, the CP is Step and the CW is Direction or DIR. If you connect the 5v to CP+ (or Step+) and CW+ (or DIR+) and the pin to CP- (or Step-) and another pin to CW- (or DIR-), then in software, the configuration for the step on that axis must be active low. Otherwise, if you connect the GND to CP- (or Step-) and CW- (or DIR-) and the pin to CP+ (or Step+) and another pin to CW+ (or DIR+), then in software, the configuration for the step on that axis must be active high.

Additional Information:
If you have a driver that is labeled pul, dir and ena: Pul+ is the Step+ and Pul- is the Step-. Pul is short for pulse. A pulse will create a step. Don't worry about the enable terminals.

On the x-axis, pin #2 can go to pul- and pin #3 can go to dir-. The 5v will go to pul+ and dir+. The configuration for each axis for step will be active low and toggle active low for the dir on each axis to make it go in the direction desired.

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I am looking for a schematic to wire a C10 BoB to a KL430 driver.

To select a 4 axis NEMA 17 motor and driver combination, you will need the following:

- Four (4) NEMA 17 motors: https://buildyourcnc.com/item/electronicsAndMotors-nema17-62ozin-NEWBIEHACK-motors-stepping_motor-62_ozin

- Four (4) drivers, either the 2.5A: https://buildyourcnc.com/item/motion%20electronics-steppermotordriver-newbiehack-Motor_Drivers-2!5_Amp_modular or the 3.0A: https://buildyourcnc.com/item/electronicsAndMotors-stepper-driver-3!0a

- One (1) Power supply, either the 24V or 36V (recommended): https://buildyourcnc.com/item/electronicsAndMotors-power-supply

- Finally, an interface is needed, either parallel, or USB. The USB works with planet-cnc software only. The parallel interface works with all major CNC control software: https://buildyourcnc.com/category/breakout

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Can you supply a quote for a 4 axis combo kit with NEMA 17 Motors