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Topics - dicksy

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General Mach Discussion / missing steps ?
« on: April 29, 2006, 05:04:19 AM »
Hi
Please help if you can!!
I have had a problem with 2 of of the last 3 jobs i've milled with mach3. The cutter has gouged my part during machining. After stopping the program and moving the cutter to x0y0 the work datum has moved position. It looks like it has moved off only in the y axis by about 4mm. The last time it was the xaxis.

I should say I ran the mill last night for 4 hours and there were no problems. I started it up this morning and the error occured after 30minutes - so it appears intermittent.
 
On the last job it gouged after 1 hours cutting. I started again and it cut for 7 hours with no problems.
 
My machine is a Denford Easimill. I have ditched the original driver boards and have fitted gecko201’s and a campbell breakout board in the original controller housing. All wiring is the manufacturers  original shielded cables.The spindle runs from an inverter which is fitted in a steel box at the rear of the machine. However the power to the inverter is taken from the cnc control unit - I have not changed this from the manufacturers original layout. Although i have replace the original inverter.
 
I have pulse frequency set to 25khz and step & dir pulse set to 9. I am working in metric units. My programmed feed rate was 300 and  i was overiding this at 510 - so I’m not going fast. My mach pc is an amd sempron 2600 1.6Ghz with 512M ram. The driver test passes no problems.
 
Thanks in advance
 
David

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