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Messages - stirling

201
I am using an Ethernet Smooth Stepper.

I might be wrong here but I seem to remember something about (some/all ?) external controllers suffering from buffer underflow when dealing with lots of extremely short lines.

Certainly in the snippet you posted, the code starts with lines in the order of 1/100ths of an inch long but towards the end it drops to lines a few thou long. (see pic).

202
General Mach Discussion / Re: Physical buttons for plasma
« on: February 06, 2016, 05:20:09 AM »
Hood - 3Nm size 23 stepper motors. direct drive via mod1 rack n pinion with 15 tooth pinion.

Question to ballscrew/linear rail users - how do you protect them? Honestly not being funny here but unless you use bellows and such I just don't get how they survive.

203
Brains Development / Re: DRO feedrate to control solenoid cycles?
« on: February 05, 2016, 04:51:26 AM »
Maybe someone involved in impact engraving could step in. It seems to me there might be at least some crossover with what you want to do.

204
General Mach Discussion / Re: Physical buttons for plasma
« on: February 04, 2016, 01:13:42 PM »
ANti corner dive in Mach3 has an On/OFF control AND you can set teh level at which it kicks in as a percent of feedrate. IF you set teh level at 80% then when teh Combined Vel in Mach3 slows to a level of 80% of teh called feedrate it should LOCK out the thcdown motion. When the Comb Vel gets back above 80% it releases teh lockout and THCdown can work again.



Ok that is fine, the MiniTHC has an input to lock the THC, so that could easily be connected via the AntiCorner Dive I think :)
Hood

See this is what happens when we're sloppy with terms.

Remember Hood that you're using the CSMIO. Anti-dive in "Mach" is like all the other THC functionality, it's in the Parallel Port driver/pulsing engine. How it works and how it's configured is completely irrelevant to you. You need to find out how the CSMIO (anti-dive in this case) works and is configured and what (if any) external signals or control functions it has.

Remember this has NOTHING to do with Mach or the plugin that allows Mach to communicate with the CSMIO. All and any THC functionality will be in the CSMIO's firmware. It's THAT you need to find out about.


205
Tangent Corner / Re: Electro-Punch design
« on: February 04, 2016, 12:01:03 PM »
looking good. That should do it.

I don't have a fancy phone either - but hey Russ at least we can do videos that don't look like they've been shot through a hole in a fence!  ;D

206
General Mach Discussion / Re: Physical buttons for plasma
« on: February 04, 2016, 11:45:15 AM »
Ah OK - that is NOT anti-corner-dive, that's kerf crossing.

EDIT: I thought it was a bit strange when you said it did anti-dive. That's usually (always?) done in the controller because it knows about feedrate. Kerf crossing is done (as it is here) in the THC because IT knows about "out of character" voltage changes.

207
General Mach Discussion / Re: Physical buttons for plasma
« on: February 04, 2016, 11:41:04 AM »
Well it wasn't really as I am not sure how things will work. The CSMIO has its own built in software THC which should be fast but if I use the MiniTHC via the CSMIO hardware to Mach, then it introduces another delay. I don't really know how that would behave. Rob said he uses the ESS and it seems to work ok, so I would imagine the delays would be similar with the CSMIO.

I think you're maybe getting the wrong end of the stick here. THC functionality is in the controller. i.e. it's in the Parallel Port Driver OR it has to be in the external controller - Mach "proper" only controls the interface.

208
From the schematic you linked to, what you're doing SHOULD work. (Technically, you shouldn't use your BOB's 5V for your switch chain but that shouldn't stop it working it will just trash your galvanic isolation). BUT - if your BOB LED is working then the inputs (at least at the D connector) must be too.

You said the existing limits work - but you said "you think" - do they?

maybe post your xml file.

209
General Mach Discussion / Re: Physical buttons for plasma
« on: February 04, 2016, 08:32:47 AM »
Is this worth pursuing or am I better just letting Mach handle the whole thing?
 The advantage I see with the THC controlling the drive direct is it cuts out the middle man (Machs Up/Dn), so it should be more responsive, but would it make much difference?

Not sure if this is a slip of the tongue key, but of course Mach3 per se is going to have nothing to do with up/down. That's going to be done by your CSMIO. So the question would then become - does the "smart" servo react any faster or slower vs the CSMIO to any degree that makes a difference? remember it's not as simple as which one's faster. Fast is good but too fast is no good at all.

210
Brains Development / Re: Axis Feed Hold Brains
« on: February 04, 2016, 07:02:19 AM »
I guess I will have to make sure my brake isn't on when i'm moving A Axis.

That's probably what you should be doing anyway, but as a belt and braces you could set the A axis scale to zero when the clamp is on. i.e. add that into your M57 macro and of course the reverse in your M58. That will effectively cause A axis commands to result in no actual motion.

BTW I think you should really be using USER macro numbers. I forget where they start but 57 and 58 are too low I think. Terry will know.