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Messages - Peter.

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1
General Mach Discussion / Re: Laptop with parallel Port
« on: October 10, 2012, 01:41:14 PM »
Just a thought - my microswitches were normally open but I popped them apart and swapped the terminal to the other side of the throw lever and now they are normally closed.

2
General Mach Discussion / Re: R 1.84
« on: October 09, 2012, 01:28:31 PM »
Not working, try this one:

ftp://ftp.machsupport.com/Mach/

Ok weird, it adds http on the front. Try this;

ftp://ftp.machsupport.com/Mach/

3
Ok cheers Hood - I just wanted to make sure there wasn't something I'm missing.

Longest travel is just over 300mm so I haven't got to wait long for it to home.

4
I'm planning to use a single microswitch for home and both end limits for my X and Y axis. I've already mocked it up and run a test by soldering a NC switch onto the parallel lead wires and just triggered it by hand and it seems to do the job nicely. Using this I can have limits on three axes and an E-stop and still have an input left spare.

Any reason not to do it?

5
Aah ok, someone told me it was a servo acting as a stepper. Pretty new to these things.

rrc1962 - yeah there is room for encoder feedback but it's an option that sadly isn't fitted.

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Sure, this is what I am using for x and y axis control, and I'm hoping to get a third one for Z.

7
Hmm, interesting read. These are not ordinary drives and motors though, they are industrial drives that do up to 1000 normal steps per revolution.

8
Ok that's great - thanks for the reply. I last tested it on 5000steps/rev and it gave me a max speed of 3m/min on motor tuning, which gives me 6 seconds end-to-end on the x-axis. I'll hook up another axis and see if that changes.

Pete.

9
I'm looking to drive a 10mm pitch ballscrew directly with my 750w servo motor, which is run as a stepper. I have two of these to drive my x and y axes on my mill conversion. For stepping I have options of 200, 400, 500, 1000 steps per rev and 10x microstepping. Clearly, 10k microsteps gives a resolution of 0.001mm per step which is miles finer than this old chinese mill can manage anyway, but it does sound nice and smooth when travelling slow whereas 2000 step/rev which gives me a resolution of 0.01mm/step seems more sensible and gives me faster rapids but it hums quite loudly when moving at slow speeds.

What would you do in my situation?

10
Hey all, Pete from Kent in the UK. Building my first CNC mill and controlling it with Mach3. I'm a CNC novice so I'll ask about what I can't find by searching.

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