Search found 162 matches

by eng199
Thu Feb 11, 2021 8:58 am
Forum: Centroid Oak, Allin1DC, MPU11 and Legacy products
Topic: Keyboard control
Replies: 8
Views: 184

Re: Keyboard control

CPU7 and CPU10 are equivalent in almost all cases as far as processing power. There were 3 different DSPs with some speed changes, but that rarely comes in to play on 4 or less axis systems. My guess is that the compact motherboard/CPU in your M15 is slower than the M400 PC. Smoothing was not availa...
by eng199
Wed Feb 10, 2021 3:33 pm
Forum: Centroid Acorn CNC Controller
Topic: VFD Voltage/RPM fluctuating
Replies: 21
Views: 634

Re: VFD Voltage/RPM fluctuating

There is no problem with the analog output under normal circumstances. The output is an opamp. The most basic form of the circuit has worked well on hundreds of Centroid products over the years. It looks like this: 1.jpg The problems occur from external non-resistive loads or electrical disturbances...
by eng199
Wed Feb 10, 2021 3:33 pm
Forum: Acorn CNC Tech Tips Knowledge Base, Look Here! before posting
Topic: VFD Voltage/RPM fluctuating
Replies: 22
Views: 330

Re: VFD Voltage/RPM fluctuating

There is no problem with the analog output under normal circumstances. The output is an opamp. The most basic form of the circuit has worked well on hundreds of Centroid products over the years. It looks like this: 1.jpg The problems occur from external non-resistive loads or electrical disturbances...
by eng199
Wed Feb 10, 2021 8:35 am
Forum: Centroid Oak, Allin1DC, MPU11 and Legacy products
Topic: Keyboard control
Replies: 8
Views: 184

Re: Keyboard control

Smoothing can require a lot of calculations before the run. Without a high end motherboard/CPU, the time may be significant.
by eng199
Tue Feb 09, 2021 10:04 am
Forum: Centroid Oak, Allin1DC, MPU11 and Legacy products
Topic: Keyboard control
Replies: 8
Views: 184

Re: Keyboard control

Is p220 smoothing 0 on both?
by eng199
Tue Feb 09, 2021 8:49 am
Forum: Centroid Oak, Allin1DC, MPU11 and Legacy products
Topic: Keyboard control
Replies: 8
Views: 184

Re: Keyboard control

Are you testing with the same G-code program?
Is the program running from the local disk in both cases?
Both take 2 presses, but the M400 has a long delay, correct?
by eng199
Tue Feb 09, 2021 8:39 am
Forum: Centroid Oak, Allin1DC, MPU11 and Legacy products
Topic: Reusing Anilam snubbers & capacitor?
Replies: 16
Views: 326

Re: Reusing Anilam snubbers & capacitor?

I’m sure I do I just don’t know what I’m looking for and the same would be true for in rush protection, again I don’t know my electrical components well enough To know what I am looking for. Call I could post some more pictures if somebody thinks they can help me identify the rectifier, I just thou...
by eng199
Mon Feb 08, 2021 2:45 pm
Forum: Centroid Acorn CNC Controller
Topic: VFD Voltage/RPM fluctuating
Replies: 21
Views: 634

Re: VFD Voltage/RPM fluctuating

ChrisAttebery wrote: Mon Feb 08, 2021 12:32 am A 1 micro Farad cap.
Adding too much capacitance to opamp outputs can also cause stability problems. I would try 0.1uF or less. A low value resistor (10 to 50 ohm) in series between ACORN and the capacitor can also prevent oscillation from too much capacitance.
by eng199
Mon Feb 08, 2021 2:45 pm
Forum: Acorn CNC Tech Tips Knowledge Base, Look Here! before posting
Topic: VFD Voltage/RPM fluctuating
Replies: 22
Views: 330

Re: VFD Voltage/RPM fluctuating

ChrisAttebery wrote: Mon Feb 08, 2021 12:32 am A 1 micro Farad cap.
Adding too much capacitance to opamp outputs can also cause stability problems. I would try 0.1uF or less. A low value resistor (10 to 50 ohm) in series between ACORN and the capacitor can also prevent oscillation from too much capacitance.
by eng199
Wed Feb 03, 2021 12:03 pm
Forum: Centroid Oak, Allin1DC, MPU11 and Legacy products
Topic: Reusing Anilam snubbers & capacitor?
Replies: 16
Views: 326

Re: Reusing Anilam snubbers & capacitor?

That is meant to bolt on top of Centroid's capacitor. Since yours looks like a smaller diameter, it will probably be a hassle to hook up.