View Full Version : 1st Cut
11-06-2011, 07:29 AM
Did my 1st cut. As sad as it may seem but ever so excited I managed to get it cutting and I thought I would share it with you lot hehe
YouTube - ‪First Cuts‬‏ (http://www.youtube.com/watch?v=2rrzn9ukLkE)
Clearly still lots to do but it's a very good start in my book.
12-06-2011, 12:14 AM
Good to get it running isn't it!
The text came out mirrored - that means you have the direction of either the X or Y axis set wrong.
You should be able to run at a lot more than 120mm/min... unless your stepper motors are very tow torque.
12-06-2011, 09:50 AM
Hi, thanks for your input and it is very nice to see it running.
You actually answered a question I was planning to ask about the text. I suppose both X and Y are incorrect so will adjust these when I am next in France where the machine is.
Feed rate was quite a funny thing. X and Y were originally set to 5 so I ramped this up to 120 for this cut. The steppers (from memory) are approx 1.25-1.5 times the torque requirements for the machine so can really change this to quite a lot more but didn't want to go mad. I will need to play with the tuning quite a bit to get the speed to an efficient rate.
12-06-2011, 10:14 AM
I suppose both X and Y are incorrect so will adjust these when I am next in France where the machine is.
No, if you flip both the X and Y it will still be mirrored! To find the correct axis directions you use the right hand rule - thumb is X axis, first finger Y, second finger Z.
This explains it:
Feed rate was quite a funny thing. X and Y were originally set to 5 so I ramped this up to 120 for this cut.
That is 5mm/min and 120mm/min, not ipm? If it's in mm/min that's really slow. I would expect a small machine like that to do 2000mm/min. Maybe your acceleration is set to high?
Actually, just looked at the video again, you used the override to get 180mm/min. Near the beginning of the Gcode there will be 'F120', try making it say F1000 then start the machine with the override set to 10%. That way you can gradually increase it and see what happens. With a 6mm cutter and 1.5mm depth of cut on a good machine you can run it at 10,000mm/min without breaking the cutter. So don't be worried about breaking it.
12-06-2011, 10:22 AM
Thanks for the link. I will have a look. I guess we all need to start somewhere and appreciate your help here :)
It's in mm, so it was very slow. Yep, have it at F120. I manually changed that just to get it a tad faster. Like your thinking on running it at 10% and then increasing it. I'll give that a go with a much higher feed rate.
Wow, that's about 16.7cm/sec isn't it. Suspect my machine cannot handle anything like that but now appreciate these machines do run a lot faster than I am currently doing so myself.
15-06-2011, 10:08 PM
congratulations lad,know just how you feel:smile:
Thanks. Cannot wait to go back and play some more. Am leaving the UK on the 1st at the moment so no doubt I'll have loads more questions around that time.
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