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bdring / FluidNC

The next generation of motion control firmware
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Increase Spinup/Spindown constaint values #414

Closed daxliniere closed 2 years ago

daxliniere commented 2 years ago

My VFD and spindle takes just over 30 seconds to spin up to 24000 rpm, but FNC has a maximum ceiling of 20 secs.

[MSG:WARN: spinup_ms value 31000 constrained to range (0,20000)] [MSG:WARN: spindown_ms value 31000 constrained to range (0,20000)]

bdring commented 2 years ago

WOW! My oatmeal gets up to speed faster every morning.

Is that the timing you want? What spindle class are you using?

daxliniere commented 2 years ago

hahaha It's a 1.5kW 3-phase spindle running with 3kW VFD. I couldn't tell you a class (nothing mentioned), but it's fairly powerful.

bdring commented 2 years ago

By class, I mean config PWM, 0-10V, RS485. Etc.

What brand VFD?

daxliniere commented 2 years ago

Ahh. It has external input controls for 0-5V, 0-10V and 20mA, though I have no idea how the last one works. I wish it was RS485, but that tripled the price, which didn't seem worth it.

This is the model: https://www.vevor.co.uk/variable-frequency-drives-c_10745/4hp-3kw-variable-frequency-drive-inverter-vfd-13a-220v-motor-speed-control-vsd-p_010692009268

MitchBradley commented 2 years ago

Please tell us everything about your setup - controller board, interface electronics that you use to control the VFD, etc. This will take forever if we have to keep asking for information.

bdring commented 2 years ago

I think it is a rebrand huanyang.

PD014 is the accel time. Try changing it to something reasonable like 8 seconds.

daxliniere commented 2 years ago

Hi Mitch. Spin-up/-down values are independent of those other factors in this particular situation.

The testing routine was setting the VFD to maximum speed, then pressing the enable button at the same time as the stopwatch, then waiting for it to hit the target speed.

daxliniere commented 2 years ago

Yeah, rebranded Huanyang. 30 secs seems like a nice slow warm-up, which the manual for the spindle recommends.

bdring commented 2 years ago

Typically a spindle has a warmup sequence. This allows the grease to evenly distribute before you use it.

You typically go to several speeds and dwell at that speed for several minutes.

12000 for 3 minutes 15000 for 3 minutes 24000 for 3 minutes

Then you can start and stop the spindle quickly as long as it does not sit too long...like 30 minutes.

Using a 31 second spinup will drive you crazy in production.

Most people with DIY machines and cheap spindles ignore it anyway.

daxliniere commented 2 years ago

Awesome, thanks so much for the info, Bart. I really appreciate you taking the time to explain it.

I'm certainly happy to have a shorter spin-up time! I'll set that when I'm next at the workshop.

All the best! Dax.

MitchBradley commented 2 years ago

Hi Mitch. Spin-up/-down values are independent of those other factors in this particular situation.

Not necessarily. We have some soft-start code kicking around that depends on the particular interface. I wanted to check to see if it would interact badly with your setup, which is why I want to know the details.