Search found 696 matches
- Tue Aug 08, 2023 6:03 pm
- Forum: Centroid Acorn CNC Controller
- Topic: HomeAll Tripped on board without tripping switches
- Replies: 3
- Views: 484
Re: HomeAll Tripped on board without tripping switches
You stated that the LED is GREEN. Wouldn't that indicate NOT tripped? RED would indicate tripped. Noise can cause a false signal. You can reduce noise by adding a resistor to the input. You could use a 1/2W 4,700 ohm resistor. Connect one end of the resistor to 24VDC. Connect the other end to the IN...
- Mon Jul 24, 2023 7:29 am
- Forum: Centroid Acorn CNC Controller
- Topic: Mist coolant wiring 24vdc
- Replies: 13
- Views: 1476
Re: Mist coolant wiring 24vdc
Here's a simple schematic that might help. L1 is the solenoid. D1 is a diode (1N4002 - 1N4007). SW1 is the relay module on the relay board. When the relay is turned ON, power flows through the solenoid. When the relay is turned OFF, induced voltage (surge) is shunted back through the diode to the po...
- Sun Jul 23, 2023 10:10 am
- Forum: Centroid Acorn CNC Controller
- Topic: Mist coolant wiring 24vdc
- Replies: 13
- Views: 1476
Re: Mist coolant wiring 24vdc
The first step in using an unknown solenoid (or any other device) is to understand how it works. You said that the solenoid is 24VDC N/C. Hook it up to 24VDC through a simple toggle switch. See what the solenoid does when power is applied and when power is disconnected. Each relay on the relay board...
- Mon Jul 10, 2023 3:44 pm
- Forum: Centroid Acorn CNC Controller
- Topic: Common, -VDC, Chassis Ground?
- Replies: 10
- Views: 1174
Re: Common, -VDC, Chassis Ground?
Usually that will work; however, there is one problem. DC supplies are usually mislabeled. A 24VDC supply is usually labeled +V and -V where +V = +24VDC and -V = 0VDC. If you buy a power supply that has a negative DC voltage, be sure that you know which terminal is 0V. That terminal should be connec...
- Sun Jul 09, 2023 6:25 pm
- Forum: Centroid Acorn CNC Controller
- Topic: Acorn STEP/DIR timing requirements
- Replies: 11
- Views: 1093
Re: Acorn STEP/DIR timing requirements
I agree with Keith. Try it out and see what happens. Page 92 has some data on the Interpolation Time Period (60C2h). It states that pulses are collected and buffered during that time period. From what I think I understand from 6.9.2, that time period is 1ms. If you've set the pulse rate to 200,000 s...
- Sat Jul 08, 2023 2:07 pm
- Forum: Centroid Acorn CNC Controller
- Topic: Common, -VDC, Chassis Ground?
- Replies: 10
- Views: 1174
Re: Common, -VDC, Chassis Ground?
Welcome to the joys of electrical engineering. Ground is ground. AC ground is zero volts. DC ground is zero volts. There is no difference in the voltage potential. All grounds whose source voltage(s) come from the same panel or sub-panel MUST be zero volts or they are not ground. Different sub-panel...
- Sat Jul 08, 2023 7:17 am
- Forum: Centroid Acorn CNC Controller
- Topic: Common, -VDC, Chassis Ground?
- Replies: 10
- Views: 1174
Re: Common, -VDC, Chassis Ground?
Ground is a common connection. Earth ground, chassis ground, and power supply ground should all be on a common bus (tied together) inside a electronics cabinet. If you have more than one cabinet and if those cabinets are supplied with AC power from different sub-panels, then you DO NOT connect the g...
- Fri May 05, 2023 3:33 am
- Forum: Centroid Acorn CNC Controller
- Topic: Motor torque…..do I need more?
- Replies: 16
- Views: 1460
Re: Motor torque…..do I need more?
The specs on that driver show a maximum of 200,000 pulses per second. Most stepper motors move 1.8-degrees per full step, or 200 steps per revolution. Most of us don't use 200 steps per revolution. To let the Centroidcnc software work at its optimum, if I've read Keith's posts correctly, he recommen...
- Thu May 04, 2023 1:15 pm
- Forum: Centroid Acorn CNC Controller
- Topic: Motor torque…..do I need more?
- Replies: 16
- Views: 1460
Re: Motor torque…..do I need more?
Motor torque depends on the load being driven. A small motor that can spin fast (3,000+ RPM) can be connected directly or to a gearbox. The torque increases depending on ratio of the gearbox. The speed decreases at the same ratio. For example, a 5:1 gearbox would increase torque 5X but it would decr...
- Wed May 03, 2023 6:37 pm
- Forum: Centroid Acorn CNC Controller
- Topic: 10/1 gears installed!
- Replies: 28
- Views: 2150
Re: 10/1 gears installed!
Let's go back to basics to see what can be done at this point to increase axis speed. If the axis stalls at 200 inch per second with 3,200 steps per revolution, what happens if you set 1,600 steps per revolution? How about 800 steps per revolution? How about 400 steps per revolution? See what happen...