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Messages - themule

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1
General Mach Discussion / Re: Steppers stalling at a certain speed
« on: June 09, 2011, 02:40:24 AM »
Ah - that makes sense and exactly matches the symptoms I am seeing. Now I know that resonance is the issue I can progress. Many thanks

2
General Mach Discussion / Re: Steppers stalling at a certain speed
« on: June 08, 2011, 03:11:07 AM »
Fine below and above - up to 1500 which is the limit of the machine. It's just that narrow range that is the problem.

3
General Mach Discussion / Steppers stalling at a certain speed
« on: June 07, 2011, 06:28:04 PM »
Hi - I would appreciate some advice. The x and y axes steppers on My Boxford 190 VMC whine and jerk and stall, but only at a feed rate of around 800 mm per min (say 750 to 850) - all other feed rates have no problem and run smoothly. The motors and drivers are originals with a breakout board added. Can anyone advise where I should start to diagnose the issue? Cheers and thanks in advance. TheMule

4
General Mach Discussion / Re: Mill Axis direction question
« on: April 14, 2011, 05:59:09 PM »
Thanks Hood. That makes sense, the axes now move in the right direction. I had the direction and the softlimits both the wrong way round. Themule.

5
General Mach Discussion / Mill Axis direction question
« on: April 13, 2011, 06:21:44 PM »
Hello All - I have a real newbie question here so apologies if this seems obvious. I am new to Mach3 and CNC.

I am a bit confused on axes direction for x and y for my small 3 axis vertical milling machine. From the point of view of the operator standing in front of the machine is x+ the table moving left to right and is y+ the table moving towards me - or is this the wrong way round or is it even important? Z axis I have no problem understanding.

If i run g code to cut a square the axes seem to move in the opposite direction to the toolpath on Mach3.

My machine homes with the table all the way towards me and all the way to my left.

Do I have a problem (if so how do i fix it) or am I just looking at this from the wrong perspective?

Thanks in advance.

TheMule

6
General Mach Discussion / Re: Denford Micromill convert to Mach
« on: February 26, 2011, 11:49:19 AM »
Thanks for all the quick responses and advice - much appreciated. Angel Tech - I will take you up on your offer when i start the project please. What sort of electronics skills would be needed with the plan of adding a breakout board to the existing drivers and PSU - it doesn't sound too hard.

7
General Mach Discussion / Denford Micromill convert to Mach
« on: February 25, 2011, 06:32:51 PM »
Hello All - I am new to this forum and new to CNC. I am planning to buy an ex-school Denford Micromill (circa 2002) with no control software. I would love to get an idea of how hard it would be for a newbie to convert to run with Mach3 and what's involved (and cost). I have a pretty well equiped workshop, a workshop PC (ok spec, Windows XP, no serial port). I am a software engineer by trade but don't have any electronics knowhow.

My research so far leads me to guess that i will need to replace the control boards for the existing 3 axis stepper motors and the spindle but I am not sure of this plus purchase Mach3.

I would really appreciate some advice.

Thanks very much ! Themule

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