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Messages - BluePinnacle

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General Mach Discussion / Re: Different use of Mach3 (dispensing)
« on: September 05, 2009, 04:45:16 PM »
Well, a peristaltic pump comes to mind, coupled to a stepper - the rollers go around and squeeze the resin through a rubber pipe. If the resin is the type to set solid in the clockwork, fear not, just replace the length of rubber pipe. You'll get very accurate pumping which can be done continuously rather than having to withdraw a piston between shots. There's also the potential for two pumps, one for resin, one for hardener, if it's a two-part glue, forced out through a disposable static mixer nozzle. Interested? :D

the lack of inertia on the pump axis (makr it as Z if you wish, I'd probably call it a spindle) means that acceleration could be very high, and you could easily program in ramp-up and ramp-down rates to suit your application, even putting in a slight suck-back to shut off flow more cleanly. There's a lot of flexibility here, potentially, but I doubt CAM applications have this in mind, so I'd think of hand-coding as the way forward.

General Mach Discussion / Re: Different use of Mach3 (dispensing)
« on: September 04, 2009, 01:48:14 PM »
Easiest may be constant flowrate, variable feed - programming the line in segments, or writing either a subroutine or a macro to control feedrate progressively.

Great work on a very interesting and productive machine, well done :)

General Mach Discussion / Re: Pico Motherboard a Good Option??
« on: September 04, 2009, 11:13:19 AM »
I had monstrous problems running my controller PC with a USB stick left in the slot, it banged and crashed and both the drives jammed solid. It's fine until it moves, after that it throws a huge tantrum. no idea why, it's intermittent so maybe the computer is polling the USB stick periodically as a priority and ruining the pulse train. Just a guess.

General Mach Discussion / Re: Do i need a bigger pc for mach..
« on: September 04, 2009, 01:36:05 AM »
Smoothstepper may be what I'm after, I've got a fairly big and quite powerful machine but I could do with faster movement. My stone ages PC will send it round at 1100mm/min tops. I'll investigate.

Tangent Corner / Re: Diseases...
« on: September 02, 2009, 08:32:10 PM »
I'm still alive, perhaps I'm just an immune carrier.

General Mach Discussion / Re: 1st MDF
« on: September 02, 2009, 08:25:48 PM »
A slice of foam insulation board is good instead of MDF for trial runs, it cuts cleanly and you can't snap a cutter in it even if you rapid through it with no spindle on ;)

General Mach Discussion / Re: MACH 3 Z axis
« on: September 02, 2009, 08:23:32 PM »
Make sure your Z goes up first and down last: up out of the way before X and Y movements, especially rapids, and down after X and Y have put it in the right place. Sounds obvious but I snapped off several cutters learning that one.

Also make sure your feedrates for Z are specified explicitly to make sure you don't stub your cutter down too hard :)

General Mach Discussion / Re: Do i need a bigger pc for mach..
« on: September 02, 2009, 08:19:59 PM »
Another vote for coding by hand, my power divider only came out as a few Kb for both sides. Windows Notepad all the way.

Very interesting! nice work on the cabinet, mine looks a bit like the crack-smoking spiders actually fitted the wires. It was all neat, and I found a few corrections to do, and a few upgrades, and off it went.

I'll be keeping an eye out to see this one up and running, good luck :)

Show"N"Tell ( Your Machines) / Re: CNC Pipe Bender
« on: September 02, 2009, 05:07:21 PM »
Just seen this - Excellent work, very useful. More uses for Mach I hadn't thought of! I hadn't really considered where bent-up fuel lines came from. Very impressed.

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