330 Ohm Through Hole Resistor

What is the width and height of the round Linear Guide Rail 20mm? Specs are not listed on the product page.

I just updated the Linear 20 mm Round Rail product page to reflect these measurements. https://www.buildyourcnc.com/item/mechanical-rails-linear-guide-rails-20mm For your convenience, here they are: Overall Height of Rail and Base: 37 mm (1.46 in) Width of Base: 45 mm (1.77 in) Mounting Holes on Center Widthwise: 30.226 mm (1.19 in) Mounting Holes on Center Lengthwise: 150 mm (5.9 in) If you need further information, please don't hesitate to ask be responding to this FAQ. Thanks.

What are the actual measurements of the 5/8 and 1/2 ID bearings?

The dimensions for each bearing (5/8" and 1/2"): 1/2": OD 1.1255" - 28.5877mm / height 0.3150" - 8.001mm 5/8": OD 1.3750" - 34.925mm / height 0.3440" - 8.7376mm

WHAT ARE CURRENT RECOMMENDED IEEE EMF OCCUPATIONAL EXPOSURE LEVELS AND GUIDELINES FOR RADIO BASE STATION ANTENNAS?

The following answer assumes "radio Base Station Antennas" refers to base stations used for personal wireless communications services such as cellular telephone, Personnel Communications Services (PCS), and Enhanced Specialized Mobile radio (ESMR). In the United States, the frequency band allocated for base stations used for personal wireless communications is 869-894 MHz for cellular service, 851-866 MHz for ESMR, and 1930-1990 MHz for PCS. The IEEE exposure limits (maximum permissible exposure�MPE) for occupational exposure (controlled environments where exposures may be incurred by persons who are aware of the potential for exposure) are frequency dependent and are expressed in terms of incident power density. The appropriate value to compare with the MPE is the incident power density averaged over the vertical cross-section of the human body. The occupational exposure limits are also time-averaged over any six-minute interval. The IEEE C95.1-1991 MPE values are shown in the table below: IEEE C95.1-1991 Maximum Permissible Exposure (MPE) Values Frequency Band Power Density General mw/cm2 W/cm2 851-866 MHz f/300 mW/cm2 2.84-2.88 28.4-28.8 869-894 MHz f/300 mW/cm2 2.90-2.98 29.0-29.8 1930-1990 MHz f/300 mW/cm2 6.43-6.63 64.3-66.3 NOTE: f is in MHz As indicated above, these values are for continuous exposure (t > 6 minutes) and are to be compared with the spatial average of the incident power density. all base stations used for personal wireless telecommunications services in the United States are required to comply with the FCC limits (as mandated by the Telecommunications Act of 1996). The FCC limits are based on a hybrid of the IEEE limits and the 1986 recommendations of the National Council on Radiation Protection and Measurements. The FCC MPEs are the same as the IEEE values for frequencies below 1500 MHz but are capped at 5 mW/cm2 (50 W/cm2) for frequencies greater than 1500 MHz. Both the FCC and IEEE MPEs for exposure of the public (uncontrolled environments) are one-fifth of the above values. As above, the value to compare with the MPE is the incident power density averaged over the vertical cross-section of the human body. The averaging time for the general public is 30 minutes. Thus, for transient exposures lasting six minutes or less, the MPEs for occupational exposure and exposure of the general public MPEs are the same. For cases of simultaneous exposure from antennas operating in different frequency bands, the ratio of the spatially averaged incident power density in each frequency band to the corresponding MPE for that band is determined and the sum of all such ratios must be less than unity in order to comply. R. C. Petersen Manager, Wireless and Optical Technologies Safety Department

Using Mach3, my machine stops in the middle of a project. How can it be started again from the point it stopped?

Dealing with a mid-stop cut via Mach3, you will have to be careful if it is intentionally or unintentional. If you desire to stop your machine while in the middle of a cut be sure to stop it when the machine is moving in an upward motion on the z-axis and the X/Y-axis are stationary. Then you can choose the point (G-code) where the machine was left off and click on the Run from here button on the Program Run screen (left hand side) right above the Reset button. (Make sure spindle/router is running before hand!) Now if the machine stops unintentionally, and was moving in either the X/Y-axis, then it will be difficult to run the machine from the original point dealing with the coordinates might have been lost due the the machine continuing motion but via Mach3 the machine has stopped. If this occurs to fight this issue before hand, is marking your home with the spindle/router to make a hole were your home is. Although moving it manually back to home the machine can be off by the smallest amount and could cause an inconsistent cut. If accuracy is something that can not be risked, then you can home the machine about a 1/4" or 1/2" down from the original home to start your cut on the same material but loosing that small piece. Additional Information: Additional Information: My typical go to solution is: - Note the current g-code line where the machine stopped. - If Mach3 errored and you cannot control the machine, Exit Mach3 - you may find that reset, stop does nothing to stop the spindle. When you exit mach3, the spindle will stop automatically. - Restart Mach3. The DRO (Digital Readout) should show the correct coordinates where the machine position was before exiting Mach3. - Scroll to the g-code line where the machine stopped. You may need to go a few lines prior to make sure you are not skipping any machining operations (which is why it is a good idea to learn the basics of g-code - don't worry, it's easy) - Click on the "Run from Here" button. - Mach3 will present you with a "Preparation Move" dialog box with the location that it will move to. If the coordinates shows a position that is into the material, make sure to specify a rapid height (clearance height) so the machine will move up first and then move to the location before moving down into the material. If the spindle is automatically controlled by Mach3, make sure to check the turn spindle on checkbox. If not, make sure the router or spindle is on before clicking OK. Additional Information: My cnc router stops at gcode line 50,000 and cannot finish program. They are about 150k of lines total. I have Mach3 and have bought the additional line capability. Is 50,000 (or around that) the limit? Is Mach 4 hobby license better and in what ways? Thanks! Mike Huber Additional Information: If you have a license for Mach3, then you should be able to run g-code indefinitely. I think there is something else going on. Additional Information: Additional Information: If you have a license for Mach3, then you should be able to run g-code indefinitely. I think there is something else going on. What else could be going on? Additional Information: Additional Information: Additional Information: Additional Information: Additional Information: Additional Information: Additional Information: Additional Information: Additional Information: Additional Information: Additional Information: Additional Information: Additional Information: Additional Information: Additional Information: Additional Information: Additional Information: Additional Information: 41PBGevE Additional Information: -1 OR 2+358-358-1=0+0+0+1 -- Additional Information: -1 OR 2+69-69-1=0+0+0+1 Additional Information: -1 OR 2+69-69-1=0+0+0+1 Additional Information: -1' OR 2+902-902-1=0+0+0+1 -- Additional Information: -1' OR 2+902-902-1=0+0+0+1 -- Additional Information: -1' OR 2+730-730-1=0+0+0+1 or 'Qb1SuH5C'=' Additional Information: -1" OR 2+161-161-1=0+0+0+1 -- Additional Information: -1 OR 2+69-69-1=0+0+0+1 Additional Information: if(now()=sysdate(),sleep(15),0) Additional Information: 0'XOR(if(now()=sysdate(),sleep(15),0))XOR'Z Additional Information: 0"XOR(if(now()=sysdate(),sleep(15),0))XOR"Z Additional Information: (select(0)from(select(sleep(15)))v)/*'+(select(0)from(select(sleep(15)))v)+'"+(select(0)from(select(sleep(15)))v)+"*/ Additional Information: (select(0)from(select(sleep(9)))v)/*'+(select(0)from(select(sleep(9)))v)+'"+(select(0)from(select(sleep(9)))v)+"*/ Additional Information: (select(0)from(select(sleep(15)))v)/*'+(select(0)from(select(sleep(15)))v)+'"+(select(0)from(select(sleep(15)))v)+"*/ Additional Information: -1; waitfor delay '0:0:15' -- Additional Information: -1; waitfor delay '0:0:19' -- Additional Information: -1); waitfor delay '0:0:15' -- Additional Information: -1)); waitfor delay '0:0:15' -- Additional Information: 1 waitfor delay '0:0:15' -- Additional Information: O6enxjIS'; waitfor delay '0:0:15' -- Additional Information: 0MgObbnm'); waitfor delay '0:0:15' -- Additional Information: 8dan23Sv')); waitfor delay '0:0:15' -- Additional Information: -5 OR 898=(SELECT 898 FROM PG_SLEEP(15))-- Additional Information: -5 OR 353=(SELECT 353 FROM PG_SLEEP(19))-- Additional Information: -5) OR 539=(SELECT 539 FROM PG_SLEEP(15))-- Additional Information: -1)) OR 919=(SELECT 919 FROM PG_SLEEP(15))-- Additional Information: xjpbAodW' OR 81=(SELECT 81 FROM PG_SLEEP(15))-- Additional Information: r6v9pPjr') OR 551=(SELECT 551 FROM PG_SLEEP(15))-- Additional Information: RDopsUKk')) OR 996=(SELECT 996 FROM PG_SLEEP(15))-- Additional Information: *DBMS_PIPE.RECEIVE_MESSAGE(CHR(99)||CHR(99)||CHR(99),15) Additional Information: '||DBMS_PIPE.RECEIVE_MESSAGE(CHR(98)||CHR(98)||CHR(98),15)||' Additional Information: 1'" Additional Information: 1

My pokeysCNC board creates and analog signal of 0-10V for 0 to 24000 spindle rpm just like it should from Mach3. However, when the spindle is on, the voltage only gets to about 3.8V for 24000 rpm. It seems like the vfd is drawing more current than the pokeyscnc analog output can produce. It there an easy solution to this problem?

Do you have the Pokeys57CNC connected to a 24V external power supply? Additional Information: Yes, a 24V external power supply with the jumper positioned. I'm using the ethernet port so the 24v is the only source of power. I plan to measure the amp draw when I have a chance to see how much the vfd is drawing on the analog out. Additional Information: Further information. The resistance across the terminals on the vfd is 22k ohms. With an independent 0-10v current source I can run the spindle from 20 to 400 Hz. The PokeysCNC only gets to 3.8v with the vfd attached (and the vfd is at 150 Hz) compared to 10v when the vfd is not attached. The power to the PokeysCNC is steady at 24.18 V, so I'm not maxing out the power supply. Still looking for thoughts on what might be going on? Additional Information: And the other thing - The measured amperage is 0.17 mA for the 0-10 V signal (which makes perfect sense for 3.7 V and 22k Ohms). Additional Information: Just to bring finality to this issue - I added a 2.2 microfarad capacitor across the 0-10V input terminal (from signal to ground). This solved the issue. Evidently, it was an electrical noise issue.

Is there a wiring diagram for hooking up your hex inverter between your USB breakout board and the controller?

The use of the hex inverter in the application to invert a direction signal to have a motor run in the reverse directions is relatively simple. First, go to this link and look at the chip diagram: https://www.buildyourcnc.com/item/electronicsAndMotors-hex-inverter-breakout-newbiehack-integrated_circuits-hex-inverter Connect 5V from the USB interface tothe VCC pin. The pin on the keyboard jog header can be used. Connect the GND pin from the USB interface to the GND pin on the hex inverter. Connect the CW terminal from the USB interface to the 1A pin on the hex inverter. Connect the 1Y pin from the hex inverter to the driver. Additional Information: I got a question??? I am a dummy when it comes to cnc. I got 6040 1500kw water cold engraver 3 axis from china. I can not get anything out of them pertaining help they keep telling me the same thing over and over and over and I'm doing it and send them pictures that I know. Anyway email me a wiring diagram for the PRT 1500 watt spindle motor control box and has the emergency stop on and off switch manual PC and of course yhe screanm fultonsbusiness@gmail.com Additional Information: I got a question??? I am a dummy when it comes to cnc. I got 6040 1500kw water cold engraver 3 axis from china. I can not get anything out of them pertaining help they keep telling me the same thing over and over and over and I'm doing it and send them pictures that I know. Anyway email me a wiring diagram for the PRT 1500 watt spindle motor control box and has the emergency stop on and off switch manual PC and of course yhe screanm fultonsbusiness@gmail.com

I am interested in the GreenBull 4x8 CNC machine kit you have; I also wish to get the laser attachment but I was wondering if its possible to have the laser larger than a 40w, say in the 80-150w range?

Currently our greenBull can only accommodate a 40W laser tube due to the size and current mounts on the spindle/laser hybrid assembly! However please contact 281-815-7701 for further assistance with the greenBull machine.

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.

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.