Re: [Emc-users] MESA 7i43

[Andrew <par...@gm...>]

2011/7/3 Viesturs Lācis <vie...@gm...>:
> 2011/7/3 Andrew <par...@gm...>:
>> 2011/7/3 Ted Hyde <las...@gm...>:
>>> He  mentioned DMM-tech, which use an absolute position encoder (I
>>> think it is used for phase-control too, instead of Hall sensors).
>>> I think DMM are missing a trick by not outputting emulated quadrature
>>> pulses from the drive.
>>
>> I'm afraid so. And there seems no encoder outputs from the driver.
>
> There is _no_ encoder output from DMM's servo drives - I was
> discussing this question with them few weeks ago. It is theoretically
> possible, but that involves changing driver software and that means
> extra cost.

For the price, it should be expected.
By the way, DMM requires 0...+5V input, and 7i48 has -10...+10V
output, it doesn't fit. 7i65 has all output voltage options, but it's
too expensive.
As 0...5V can be easily done from PWM with RC chain... I might try to
find some inexpensive SPI encoders, connect them to 7i43 and go
without daughter encoder cards... or give up analog mode for DMM at
all =) If I could just connect their encoders in parallel here and
there...

I just ordered single 7i43 with Czech post shipping.

Andrew