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### Question #: 533

Question: LIMIT SWITCH PROBLEM

Current Solution

This is a common problem. Are you using shielded wire? If so, take the shield to ground. If there are any other wires in the cable that is not being used, ground those as well. Also try moving the cables as far away as possible from the motor wires and motors.

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### Other Possible Solutions to this Question

• LIMIT SWOTCXH PROBLEM

This is a common problem. Are you using shielded wire? If so, take the shield to ground. If there are any other wires in the cable that is not being used, ground those as well. Also try moving the cables as far away as possible from the motor wires and motors.

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LIMIT SWOTCXH PROBLEM

• PROBLEM WITH LIMIT SWITCHES TRIGGERING

Are you using shielded wire? If so, take the shield to ground. If there are any other wires in the cable that is not being used, ground those as well. The customer can also try moving the cables as far away as possible from the motor wires and motors.

Additional Information:

Additional Information:

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PROBLEM WITH LIMIT SWITCHES TRIGGERING

• HOW SERIOUS A PROBLEM INFLUENZA IN THE U.S.?

Influenza is the most frequent cause of death from a vaccine-preventable disease in the United States. From 1990 through 1999, an average of approximately 36,000 influenza-associated pulmonary and circulatory deaths occurred during each influenza season. In addition to fatalities, seasonal influenza is also responsible for more than 200,000 hospitalizations per year. Rates of infection from seasonal influenza are highest among children, but the risks for complications, hospitalizations, and deaths are higher among adults ages 65 and older, children younger than 5 years, and people of any age who have medical conditions that place them at increased risk for complications from influenza.

A novel H1N1 virus was first detected in March of 2009 and quickly spread to pandemic levels. In the U.S., it is estimated that approximately 43-89 million persons became ill with 2009 pandemic H1N1 from April 2009 to April 2010. The virus also resulted in significant hospitalizations and deaths among children, adults 19-65 years, obese persons, and pregnant and post-partum women.

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HOW SERIOUS A PROBLEM INFLUENZA IN THE U.S.?

• HOW SERIOUS A PROBLEM INFLUENZA (THE FLU) IN THE U.S.?

Influenza is the most frequent cause of death from a vaccine-preventable disease in the United States. From 1990 through 1999, an average of approximately 36,000 influenza-associated pulmonary and circulatory deaths occurred during each influenza season. In addition to fatalities, seasonal influenza is also responsible for more than 200,000 hospitalizations per year. Rates of infection from seasonal influenza are highest among children, but the risks for complications, hospitalizations, and deaths are higher among adults ages 65 and older, children younger than 5 years, and people of any age who have medical conditions that place them at increased risk for complications from influenza.

A novel H1N1 virus was first detected in March of 2009 and quickly spread to pandemic levels. In the U.S., it is estimated that approximately 43-89 million persons became ill with 2009 pandemic H1N1 from April 2009 to April 2010. The virus also resulted in significant hospitalizations and deaths among children, adults 19-65 years, obese persons, and pregnant and post-partum women.

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HOW SERIOUS A PROBLEM INFLUENZA (THE FLU) IN THE U.S.?

• WHERE IS GOOD PLACE TO PUT THE E-STOP SWITCH?

Locate the switch as close to where you will normally be as possible and in clear sight.

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WHERE IS GOOD PLACE TO PUT THE E-STOP SWITCH?

• MY LIMIT SWITCHES ARE TRIGGERING AT RANDOM.

Are you using shielded wire? If so, take the shield to ground. If there are any other wires in the cable that is not being used, ground those as well. The customer can also try moving the cables as far away as possible from the motor wires and motors.

Additional Information:

Additional Information:

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MY LIMIT SWITCHES ARE TRIGGERING AT RANDOM.

• DO NEED LIMIT SWITCHES, IF SO WHAT IS YOUR RECOMMENDATION?

Limit switches are not really needed for this level of a machine, but if you do want to use them, then you will need to connect them with shielded cable and ground the shield at both ends and any other non-used wire in the cable. Limit switches are very susceptible to the motor interference. You will also need to adjust the debounce in the software you will use.

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DO NEED LIMIT SWITCHES, IF SO WHAT IS YOUR RECOMMENDATION?

• THE DUST SHOE HAS STIFF BRISTLES, IS THERE PROBLEM WITH MOVING Z-AXIS DOWN SINCE BRISTLES PUSH AXIS SIDEWAYS

A couple things to consider, the machine is most likely moving sideways, so the bristles won't be a problem. The lead screw has a very hight mechanical advantage and the bristles don't pose an issue with this. We have not found that the bristles cause any appreciable deflection to the work we do in our shop; however, you can change the brush for a more pliable plastic, or reduce the number of bristles by selectively pruning.

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THE DUST SHOE HAS STIFF BRISTLES, IS THERE PROBLEM WITH MOVING Z-AXIS DOWN SINCE BRISTLES PUSH AXIS SIDEWAYS

• MY LASER MACHINE VERTICAL DOES NOT ACTIVATE THE LASER TUBE, VERIFY THE POWER SUPPLIES AND THEY ARE WORKING WHICH THE PROBLEM CAN BE

Same issue here -- TTL output from the AWC708C never seems to be pulled low. Still troubleshooting.

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MY LASER MACHINE VERTICAL DOES NOT ACTIVATE THE LASER TUBE, VERIFY THE POWER SUPPLIES AND THEY ARE WORKING WHICH THE PROBLEM CAN BE

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