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Jefoni wrote:I want so bad to be able to do cnc machining, but maybe it is just too complex for me. SO I started with a 6040 Chinese machine just to see if this hobby was for me. I LOVE IT, BUT, I am having issues. Since day one, on SOME things I want to cut, the machine stalls. It just starts to make a grinding / binding noise, then starts to move properly again however, it is way off course. I have tinkered with motor tuning, feeds and speeds of my VECTRIC software and I can't fix it. Sometimes I will cut an entire project with NO issues, and other times I cant get thru one piece. Not sure how many know of the VECTRIC free project called the "BLING BOX". I cut the sides and bottom out PERFECTLY. Now I am trying to cut the top. After 3 failed attempts, I set my speed in my VECTRIC software tool path to 2200 mm per minute and plunge to 700 per minute. I ran the entire tool path in thin air with NO WOOD, and it ran the whole thing perfect. I put a piece of pine on the machine, and it stalled on line 336. NEVER stalls on the same point. There seems to be NO consistency to when it will do it.
ANY IDEAS? I would pay someone to fly to Arizona and fix this problem. I want to buy a new 48x96 machine, but if I cant get the little one to work why spend 20K on a big one right??
Anyway, below are my specs, and I have also attached my .xml file. This is ALL the info I know, so if you start asking me about screws, pitches, frequencies etc, I will be lost. One thing I will tell you is the MFG told me to set the machine in mach 3 up like this:
Steps: 640
Velocity: 2500 XY 800 Z
Accel: 200 XY 150 Z
When I set Steps to 640 everything is doubled. I run the step calculator in Mach 3 and it says to set steps to 320 so I did.
SPECS:
Dell Computer running windows XP
ETHERNET SMOOTH STEPPER
Chinese 6040z + S65J
VFD SPindle usually run at 300khz or 18000 rpm
.XML attached
Any help and patience would be appreciated, and if the help is I am over my head, so be it. I just gotta know cause it has been driving me nuts for 6 months now.
Jefoni wrote:Thanks everyone for the guidance.
Leo, I am using a four fluted endmill with a cut depth of .125 inches in zebra wood and poplar for this particular project, the bling box. It cut the bottom and sides perfectly, but won't cut the top properly.
I posted on a couple forums, and most of the responses are similar relating to acceleration and velocity settings in Mach. What I don't know and maybe you can enlighten me, which speed is it that the machine runs in? Said a different way, let's say my mach software is set to 3 inches per minute, however in Aspire I set my feed rate to 1.5 inches per minute; does the G code created by Aspire override the faster speed set in mach? Or should I set my motor speeds in Mach3 to mach the feed rates in Aspire on each project?
I am just getting the sense from all the replies that the problem is surely related to the relationship between Aspire feed rates and Mach3's acceleration and velocity settings.
I am going to clean, lubricate, and check bearings as suggested as well. Then I will cut my Mach settings in half, line them up with the feed rate in Aspire and see how she goes.
Again I thank everyone for the quick and detailed responses.
Regards,
Jeff
Jefoni wrote:Thanks everyone for the guidance.
Leo, I am using a four fluted endmill with a cut depth of .125 inches in zebra wood and poplar for this particular project, the bling box. It cut the bottom and sides perfectly, but won't cut the top properly.
I posted on a couple forums, and most of the responses are similar relating to acceleration and velocity settings in Mach. What I don't know and maybe you can enlighten me, which speed is it that the machine runs in? Said a different way, let's say my mach software is set to 3 inches per minute, however in Aspire I set my feed rate to 1.5 inches per minute; does the G code created by Aspire override the faster speed set in mach? Or should I set my motor speeds in Mach3 to mach the feed rates in Aspire on each project?
I am just getting the sense from all the replies that the problem is surely related to the relationship between Aspire feed rates and Mach3's acceleration and velocity settings.
I am going to clean, lubricate, and check bearings as suggested as well. Then I will cut my Mach settings in half, line them up with the feed rate in Aspire and see how she goes.
Again I thank everyone for the quick and detailed responses.
Regards,
Jeff
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