Hardinge HNC retrofit and where to start

bobinater wrote:

so what do you guys think will be the best combination and I will get the goodies on order.

I think you would need to count up how much IO you need, and at what voltages and currents first.

It may be that the Pico boards suit your requirements, though I suspect that 3 channels of Resolver cards at $150 each probably pushes the price a lot higher than a Mesa system.
(I feel guilty that I always seem to end up suggesting the hardware that I know, from Mesa, and not anything from Pico. I feel less guilty about Motenc etc as they don't offer such direct support to LinuxCNC.)

My current build is using a number of smart-serial devices including a 7i64 which is a rather expensive board, but has 24 inputs and 24 outputs, all rated at 48V and with 2.5A rating on the outputs. They are all completely isolated too, so can run from different voltages, and can switch/sense either high-side or low side. However, that is a $200 board that needs a $70 adapter card. You would need the same adapter to add a 7i73 pendant card.

I think the starting list for a Mesa setup would be the 5i23 and 7i49. (I don't think that the 5i20 has enough FPGA resources for the Resolver firmware).
If you don't already have a PC, then the Intel D525 would be the one to go for. it's cheap compact, low-power and known-good with LinuxCNC.

The rest of the requirements come down to how many switches, relays etc you need to control at what voltages/currents. I think I saw a big array of solid-state relays, so they can all be easily switched with any doughter board, or even by direct connection to the 5i23 headers. (if brave)

bobinater wrote:

I think all I would want in the pendant would be remote jog and possibly
feed and speed overide and E-stopb

That could be done without a specific interface board. it sounds like a 5-position switch, a manual pulse generator and an e-stop button, so 12 wires using 9 digital input lines.

bobinater wrote:

Andy I just thought a pendant would be nice to have but not required. not so much into the whole
game controller so don't really want one on my lathe (just preference nothing personal)

I would like to have constant surface speed (requirement)

Will upload more pics this P.M.

CSS will need encoder feedback from the spindle. On my CHNC I have the MPG and a few switches like start, pause, collet open, collet close, axis select, and jog increment.

gnipsel.com/shop/hardinge/hardinge-10.xhtml

John

BigJohnT wrote:

bobinater wrote:

CSS will need encoder feedback from the spindle

CSS is fine without feedback. Feed-per-rev and threading need feedback though.
However, I think someone said that there was a third resolver on the spindle.

bobinater wrote:

what is the average cost of the d525 pc and where should I buy one.

I assume you are in the US, so a UK source is no good.

Try www.newegg.com/Product/Product.aspx?Item=N82E16813121442
Then maybe www.newegg.com/Product/Product.aspx?Item=N82E16820227510
and probably www.mini-box.com/picoPSU-90