Originally Posted by jeffs555 I don't know what travel rates you need,...... the maximum speed for your X axis .....will be somewhere between 1500 to 3000 mm/min.
The steppers might also have a speed problem. ......with 65 volt max drives, your speed will be almost half of that in the curves. Even at 100v they might be too slow. |
jeffs555
--------
Thanks for your interest.
Regarding speed:
1.5 - 3.0 Metres per minute sounds relativly low speed for machine this size.. I hear what you are saying.. motors are under-driven at 65v also. I thought of both of these aspects which is reason for this post ... to check my thinking and conclusions.
I'm happy to under-drive to start with. Last thing I want to do is push the Ballscrews too far and encounter whipping and bending problems. Accuracy and reliability are my main watchwords at the moment.. saw a tagline/sig on the forum... can't remember who has it.. but says "1st get good.. then get fast !!". Sounds like good advice to me.
Will be business usage for this machine and time is money as you say. I'm a bit of a one-man-band operator and I will have finishing and assembly work to get on with while CNC cuts my work for the next job. If it only cuts and shapes as fast as I could by hand then it will improve my job turnaround times by 100%. I think it should go well beyond my hand-working speeds so will still be worth the investment.
Long-term I am thinking about upgrades to both Ballscrews and motor drive. but to my mind I need to test and prove the rigidity of my frame design in real work situation first. I've never built anything this big with 8020 type extrusion. No good to me if forces exerted make it sway and slop all over the place... so softly softly catchee monkey is my planned approach.
Thanks again for your input.. this is just what I need really.. before I buy items and commit myself to a dodgy plan. I do take all comments on board for serious consideration.... so please keep them coming
