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Messages - EJParrott

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21
General Mach Discussion / Re: ethernet pendent
« on: October 24, 2012, 11:30:54 AM »
Not sure about ethernet, but Zapp tipped me off that they'll be getting a pendant in which is USB I think...worth an email though!

22
General Mach Discussion / Re: Building a stepper motor dyno
« on: October 22, 2012, 12:19:54 PM »
The exact problem I was faced with for the Bridgeport, and will again soon with the lathe hopefully....just what size stepper do you need???!!!

23
General Mach Discussion / Re: Zapp Automation - anyone used?
« on: October 17, 2012, 09:34:41 AM »
Just so happens, while setting up at the Midlands Model Engineering Exhibition, I noticed the stand next door was labelled 'Zapp Automation'.  I assume its the same company, hopefully they turned up, I'll be having a good look at their stuff at the weekend, maybe even get the next stepper motor if they've got one with them.

24
An indicator *should* be able to cope with the method you described.  My day job is as a machinist, and I set some pretty rough flamecuts with my dti's.  I do agree that it may be a source of an error.  When I'm setting up a new machine, you must be careful to reverse the axis before taking the reading at one end, and then continue in one direction only and do not reverse before taking the reading at the other end - its quite surprising how much error will show up.  To be fair though, I am usually dealing with traveling column machines where the column can weigh in at over 10t, but its still evident on smaller machines if your dti can measure it.

I have to ask the question, what is 'perfectly flat'.  Father used to work in a hardboard mill so I know a bit about the manufacturing process, although I don't know the tolerances.  You have to consider though, it isn't an 'engineering' material.  It would be interesting to know what you get when you're happy that your setup is good and your clock is good.

25
I would be as much inclined to say that the MDF is not flat as much as anything else.  I don't believe that MDF manufacturers have that great a tolerance on flatness.  Ideally, you need to machine the table so that it is flat.

26
General Mach Discussion / Re: Mach3, 6 steppers and... how to?
« on: October 11, 2012, 01:04:07 PM »
I'm curious, what are the slaves doing/for?

27
I've only a 3-phase convertor for the lathe, not recommended for running proper 3-phase stuff.

Thanks anyway

28
I'm in Rugby, near Coventry.  Its single phase to 3-phase I need, to drive the dual voltage 2.2Kw motor from a 16a 240v supply.

29
Thanks!

Does anyone have any recommendations of manufacturers or retailers, or even who to avoid?

30
Any VFD should be capable of that as any I have seen can be controlled from a potentiometer so all you need to do is input to the pot terminals.
Hood

All the ones I'm looking at at present don't have the old rotary Pot, but up and down arrow keys.  Would they function in the same way, or is this something I need to be aware of?

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