8i20/BLDC component, limited spindle speed

Which version of LinuxCNC are you using?

The nvqil should be the limit (according to the 8i20 manual).

I assumed that nvkqil=NVKQI based on it's default value and the fact that nvkqihi and nvkqilo exist but nvkqi does not.

nvqihi and nvqilo should be the high and low order halves of a long-int value. I don't actually recall _why_ they are split across two HAL parameters. The manual says that they are "ULONG" and the integer HAL pins are 32-bit (floats are 64-bit doubles)so it may be that I determined that they are a 64-bit value and had to spread across 2 32-bit pins.

So it looks like nvkqil=NVKQIL from the manual and it is the limit and nvkqilo, nvkqihi are part of NVKQI? That makes sense but I'm still not sure about the default value of the limit being lower than the split value of the gain. Then again some of this stuff is over my head.


Maybe PCW can advise?[/quote]

Yeah ULONG to SSLBP is 32 bit, UINT is 16 bits so you should not change the "hi" parts and the "lo" parts have a unsigned 32 bit range

A single u32 is correct

it looks like the lo/hi parts should just be merged (and use the low address)

So I suppose in the meantime the changes I would likely want to make are:
nvkqilo-150000 as per manual
nvkqihi-leave at 0
nvkqil-200000 to be higher than nvkqilo?
the same adjustments for nvkdil,nkdilo and nvkdihi.

Andy, the changes that you are making to the 8i20 (driver?), how would they be released? Is it a compile a new branch kind of thing or is it something I can add to my current RIP?

blazini36 wrote:

So I suppose in the meantime the changes I would likely want to make are:
nvkqilo-150000 as per manual
nvkqihi-leave at 0
nvkqil-200000 to be higher than nvkqilo?
the same adjustments for nvkdil,nkdilo and nvkdihi.

Andy, the changes that you are making to the 8i20 (driver?), how would they be released? Is it a compile a new branch kind of thing or is it something I can add to my current RIP?

I started to to make these changes last night but it didn't seem to be going well. nvkqil I could not get to set at 200000. Is there an internal limit for the value? It seemed as though I was just having issues with setserial again, but other parameters were setting easier.

PCW, can you confirm that the numbers I suggested above would be right? Any idea why my 8i20 would come with a default value of 32000 nvkqilo (NVKQI) when the manual suggests it be at 150000?

Andy, is there any way for setserial to run multiple "sets" at once?