Search found 696 matches
- Wed May 29, 2024 1:42 pm
- Forum: Centroid Acorn CNC Controller
- Topic: Wiring Home switches
- Replies: 4
- Views: 218
Re: Wiring Home switches
PNP sensors SOURCE (pull high) current. NPN sensors SINK (pull low) current. Acorn inputs require the input device to pull the signal low. N/C means that the output signal is high until the sensor sees its target. When the sensor sees the target, the sensor's output signal turns off, but does not pu...
- Sun May 26, 2024 10:01 am
- Forum: Centroid Acorn CNC Controller
- Topic: Teknic Eclipse servo wiring (Solved)
- Replies: 3
- Views: 179
Re: Teknic Eclipse servo wiring
Page 19 of the Teknic user manual states that the Step, Direction, and Enable signals can be either TTL (5VDC) or open-collector. SSt-Eclipse drives can support any stepper motor indexer or pulse source that produces industry-standard step and direction signals. The step and direction signals from ...
- Mon May 06, 2024 8:58 am
- Forum: Centroid Acorn CNC Controller
- Topic: ethernet communication errors...wits end
- Replies: 8
- Views: 500
Re: ethernet communication errors...wits end
Tell us about your computer. Do you have WiFi enabled? Is it a laptop? Have you followed the instructions to prepare your PC for use with the Acorn?
- Fri Apr 19, 2024 1:22 pm
- Forum: Centroid Acorn CNC Controller
- Topic: 2006 ShopBot PRT Alpha controller upgrade...
- Replies: 10
- Views: 893
Re: 2006 ShopBot PRT Alpha controller upgrade...
Contact Gary Cambell. He's helped a lot of guys upgrade their Shopbots by using an Acorn controller.
- Wed Mar 27, 2024 1:53 pm
- Forum: Centroid Acorn CNC Controller
- Topic: Need a small motor for lathe spindle
- Replies: 2
- Views: 1782
Re: Need a small motor for lathe spindle
I've used Teknic's ASU-FR510 unit to control an MCPV motor from 0-10VDC. The ASU-FR510 costs about $60.
- Thu Feb 08, 2024 7:54 am
- Forum: Centroid Acorn CNC Controller
- Topic: Proximity Sensor issue, never trips? < solved, used NPN>
- Replies: 8
- Views: 1075
Re: Proximity Sensor issue, never trips? < solved, used NPN>
Maybe if I drawn the circuit as a generic snubber, you'll see that the diode is not shorted. In the circuit, current passes through the resistor, through the coil, and then through the NPN transistor. The diode suppresses induced current when the transistor is turned off by shunting that current bac...
- Wed Feb 07, 2024 4:54 pm
- Forum: Centroid Acorn CNC Controller
- Topic: Proximity Sensor issue, never trips? < solved, used NPN>
- Replies: 8
- Views: 1075
Re: Proximity Sensor issue, never trips? < solved, used NPN>
KB58, no offense taken. However, did you notice that the In4148 is reversed biased, which is the correct orientation for its use as a shunt to protect an Acorn Input. The Acorn input is basically an opto-coupler. The Anode of the opto-coupler is connected to +24VDC internally. The Cathode of the opt...
- Mon Feb 05, 2024 9:52 am
- Forum: Centroid Acorn CNC Controller
- Topic: Proximity Sensor issue, never trips? < solved, used NPN>
- Replies: 8
- Views: 1075
Re: Proximity Sensor issue, never trips?
Mistakes happen. Years ago, I bought some PNP prox. sensors instead of NPN sensors. That was before parts were available in two days on the Internet. I wasn't uncommon to have to wait for weeks for parts to arrive, unless you were willing to pay expense rush fees. Instead of spending $100 for three ...
- Sun Jan 14, 2024 7:22 pm
- Forum: Centroid Acorn CNC Controller
- Topic: Leakage Circuit Breaker Question
- Replies: 5
- Views: 956
Re: Leakage Circuit Breaker Question
Google Earth-leakage circuit breaker. By definition, they are not exactly the same as a GFI breaker. A Wikipedia article described two types, ELCB (voltage) and RCCB (current). Since you're the designer/engineer on your project, you can do anything that you want; but, if I were using your components...
- Sun Dec 24, 2023 12:25 pm
- Forum: Centroid Acorn CNC Controller
- Topic: In over my head - New CNC Router rebuild.
- Replies: 46
- Views: 18333
Re: In over my head - New CNC Router rebuild.
One of my favorite physicists is Richard Feynman because he explained complex things simply. His goal was to convey knowledge so that whoever was listening would understand both the problem and the solution. With Feynman's approach in mind, connecting a stepper motor driver to the acorn is simple. 1...