Frequently Asked Questions

Here are answers to frequently asked questions we receive from some of our customers. If the answers below do not provide you with the information you need, or you would like a consultation about your workshop’s setup, please contact us.

Frequently Asked Questions
How many gates can I have?

As many as you need. There is no limitation. However, we suggest limiting a gate cable run from the System Controller to eight gates.

What is the largest collector I can have?

There is no limitation. Most smaller shops require no more than 3 horsepower. However larger motors can certainly be accommodated.

What if I have a 220 Volt collector motor larger than the 2 horsepower rating of the System Controller?

We have several 3 pole Motor Contactor units that are slaved to the System Controller. They can switch two or three phase motors rated up to 5 horsepower and 280 Volts. Look at the Motor Contactor products.

Why do some of the Motor Contactors have 115 Volt coils and others 230 Volt coils?

The coil voltages of the Contactors need to match the voltage that you wire to your System Controller, either 115 or 230 Volts. However, the Contactor contacts can be wired to whatever you need to power your collector. The voltage controlling the collector via the Contactor is totally independent from the voltage used to power the System Controller.

My collector uses a motor controller that has low voltage ON/OFF push buttons. How do I get the GrnGate system to work with this?

Several collector manufacturers have started using 3 phase motors and motor controllers. Although the voltage to power this product is single phase, the motor controller turns the single phase voltage electronically into 3 phase power.  Having a three phase motor allows for variable speed, torque control and other motor control features. We have a Motor Control Adapter (GG900A) that bridges the gap from our System Controller to the motor controller on the collector. It electronically emulates the ON/OFF push buttons that came with the collector. You can download the instructions for this unit from the OUR SYSTEM 🡪 INSTRUCTIONS page.

Is there any limitation on cable length?

No. We ship 6’ Sensor cables and 25’ Gate cables with our products. We found these lengths are the most widely used. However, you can use whatever lengths you require for both the gates and sensors.

Can the gate be connected to either plastic or metal ducting?
Yes. The flange on both sides of the gate is stepped and allows for a wide range of duct sizes. Click here to download dimensioned drawing of the blast gate.
What is the largest collector I can have?
There is no limitation. Most smaller shops require no more than 3 horsepower. However, larger motors can certainly be accommodated.
What if I have a 220 Volt collector motor larger than the 2 horsepower rating of the System Controller?
We have several 3 pole Motor Contactor units that are slaved to the System Controller. They can switch two or three phase motors rated up to 5 horsepower and 280 Volts. Look at the Motor Contactor products.
Why do some of the Motor Contactors have 115 Volt coils and others 230 Volt coils?
The coil voltages of the Contactors need to match the voltage that you wire to your System Controller, either 115 or 230 Volts. However, the Contactor contacts can be wired to whatever you need to power your collector. The voltage controlling the collector via the Contactor is totally independent from the voltage used to power the System Controller.
My collector uses a motor controller that has low voltage ON/OFF push buttons. How do I get the GrnGate system to work with this?
Several collector manufacturers have started using 3 phase motors and motor controllers. Although the voltage to power this product is single phase, the motor controller turns the single phase voltage electronically into 3 phase power.  Having a three phase motor allows for variable speed, torque control and other motor control features. We have a Motor Control Adapter (GG900A) that bridges the gap from our System Controller to the motor controller on the collector. It electronically emulates the ON/OFF push buttons that came with the collector. You can download the instructions for this unit from the OUR SYSTEM 🡪 INSTRUCTIONS page.
Why don’t you offer a 6 inch gate?

We occasionally have inquiries for larger gates. But most shops do not require anything larger than 4 inch. On the rare occasion that a 6 inch gate is needed, we offer a 6 inch equivalent gate kit. It uses two 4 inch gates in operating in parallel which is equivalent to a 6 inch gate. We could not justify the cost of tooling a 6 inch design.

Is there any limitation on cable length?

No. We ship 6’ Sensor cables and 25’ Gate cables with our products. We found these lengths are the most widely used. However, you can use whatever lengths you require for both the gates and sensors.

Can I buy my own cables?

Yes, but purchase quality cables. Our cable connectors have gold-plated contacts as do the jacks in the components for long term reliability.

Can I make my own cables?

Yes. But you need to use quality cable and match the cable type (flat or round) to the appropriate plug. As mentioned above, use gold plated connector contacts.

Are the gate cables Ethernet type?

Yes. However, the system design is not power over internet. We chose Internet style cables because of their wide availability, cost and reliability.

Will the system work in Europe?

Yes. The system is designed to operate from either 115 or 230 Volts AC, 50 or 60 cycles. This covers the major available power in most countries.

Can the Sensor be used on 115 Volt and 230 Volt machines?

Yes. The Sensor detects the magnetic field surrounding the power cord when current is flowing due to the tool being on. This detection scheme is voltage independent.

What if I have a larger power cable than the Sensor can accommodate?

The black tubing ‘spacers’ on the clip can be removed for larger cables. But if this is still too small, the Sensor can be attached to the cable with tie wraps.

What is the Manual Switch used for?

We recommend using manual control for chop saws. Many tasks on this tool are repeated on-off-on-off types of operation. Using manual control rather than the automatic sensor prevents the collector from doing lots of cycling on-off that is not good for the motor. Also, many shops have floor sweeps requiring manual control. Read more about the manual switch on the components page.

Can I have both a Sensor and Manual Switch on the same gate?

Yes. We offer a Sensor Splitter made just for this. With it you can have a Sensor/Manual Switch, two Sensors or two Manual Switches. Adding additional Splitters will allow even more Sensors and Switches.

What about static electricity?

Static electrical discharges, or ESD, can pose an issue, especially during dry times of the year when the humidity is low. The gates are usually connected to the tool with flexible spiral ducting and most of the material has an embedded spiral wire. It’s a simple task to strip back a small amount of the wire at the tool and using a jumper, connect the wire to the tools’ frame. There is a link to a short paper on how to do this on the USEFUL LINKS page of the web site.