Acceleration not high enough?
25 Jul 2018 14:16 #114802
by bevins
Acceleration not high enough? was created by bevins
It is taking about 1 foot to get up to speed. There is going to be no load as this will be a plasma.
I just would like your opinion if I should bump up the accel or not.
I just would like your opinion if I should bump up the accel or not.
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25 Jul 2018 14:56 - 25 Jul 2018 14:58 #114804
by tommylight
Replied by tommylight on topic Acceleration not high enough?
What do you intend to cut with it ?
For 5mm and above, the 500 to 700 should do just fine, under that you would need above 700 to be able to get nice corners. That is mm/s/s.
300 is usable from 3mm and above but you have to use G64 P0.x Q0.x where x is the amount of tolerance from the exact path.
For 5mm and above, the 500 to 700 should do just fine, under that you would need above 700 to be able to get nice corners. That is mm/s/s.
300 is usable from 3mm and above but you have to use G64 P0.x Q0.x where x is the amount of tolerance from the exact path.
Last edit: 25 Jul 2018 14:58 by tommylight. Reason: added more
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25 Jul 2018 15:20 #114807
by bevins
It will be a plasma, so, dont really need really high rapids. I will limit rapids to 650, and at 300 ipm, it ramps up nicely and fast.
It stalled at 960 once. So I will limit at 650.
Thanks,
Bob
Replied by bevins on topic Acceleration not high enough?
What do you intend to cut with it ?
For 5mm and above, the 500 to 700 should do just fine, under that you would need above 700 to be able to get nice corners. That is mm/s/s.
300 is usable from 3mm and above but you have to use G64 P0.x Q0.x where x is the amount of tolerance from the exact path.
It will be a plasma, so, dont really need really high rapids. I will limit rapids to 650, and at 300 ipm, it ramps up nicely and fast.
It stalled at 960 once. So I will limit at 650.
Thanks,
Bob
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25 Jul 2018 21:53 #114840
by rodw
Replied by rodw on topic Acceleration not high enough?
Bevins looking nice. I just checked my config for my NEMA 34's with 5:1 reduction on the Y axis (metric) and have
Metric of course. Velocity equates to about 850 inch/min; Acceleration 59 in/sec/sec.
At one stage, I had a dial indicator against the top of the gantry looking for flex under acceleration as I came up with these. I seem to remember that I wanted to be over 900 mm/sec/sec based on feedback from Tommy a long time ago.
[AXIS_Y]
MAX_VELOCITY = 360
MAX_ACCELERATION = 1500
Metric of course. Velocity equates to about 850 inch/min; Acceleration 59 in/sec/sec.
At one stage, I had a dial indicator against the top of the gantry looking for flex under acceleration as I came up with these. I seem to remember that I wanted to be over 900 mm/sec/sec based on feedback from Tommy a long time ago.
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25 Jul 2018 22:16 #114841
by bevins
That looks kind of slow. What speeds you cutting with?
Also, is thcad working properly in Lcnc? Because i see alot of people scrambling working on development in connectioen to,plasma thc etc.... just wondering if i need to look at another option.
Replied by bevins on topic Acceleration not high enough?
Bevins looking nice. I just checked my config for my NEMA 34's with 5:1 reduction on the Y axis (metric) and have
[AXIS_Y] MAX_VELOCITY = 360 MAX_ACCELERATION = 1500
Metric of course. Velocity equates to about 850 inch/min; Acceleration 59 in/sec/sec.
At one stage, I had a dial indicator against the top of the gantry looking for flex under acceleration as I came up with these. I seem to remember that I wanted to be over 900 mm/sec/sec based on feedback from Tommy a long time ago.
That looks kind of slow. What speeds you cutting with?
Also, is thcad working properly in Lcnc? Because i see alot of people scrambling working on development in connectioen to,plasma thc etc.... just wondering if i need to look at another option.
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26 Jul 2018 00:49 #114849
by bevins
Replied by bevins on topic Acceleration not high enough?
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26 Jul 2018 03:00 #114853
by rodw
Yes the thcad with the THCAD component will work fine or use Tommy's Proma config.
We've just we've been trying to push the boundaries in an experimental way with plasma to build a better linuxcnc mouse trap.
I think my max speed is 21 metres/min. I never actually tested it out but that seemed fast enough as not much needs > 6 m/min.
Your 5i25 was a pretty wild hack
could you have used a right angle header to lay it down?
Replied by rodw on topic Acceleration not high enough?
That looks kind of slow. What speeds you cutting with?
Also, is thcad working properly in Lcnc? Because i see alot of people scrambling working on development in connectioen to,plasma thc etc.... just wondering if i need to look at another option.
Yes the thcad with the THCAD component will work fine or use Tommy's Proma config.
We've just we've been trying to push the boundaries in an experimental way with plasma to build a better linuxcnc mouse trap.
I think my max speed is 21 metres/min. I never actually tested it out but that seemed fast enough as not much needs > 6 m/min.
Your 5i25 was a pretty wild hack
![:) :)](/media/kunena/emoticons/smile.png)
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26 Jul 2018 04:36 #114855
by bevins
It has a slot for a sideways pci riser but I didnt feel like researching it.
Replied by bevins on topic Acceleration not high enough?
That looks kind of slow. What speeds you cutting with?
Also, is thcad working properly in Lcnc? Because i see alot of people scrambling working on development in connectioen to,plasma thc etc.... just wondering if i need to look at another option.
Yes the thcad with the THCAD component will work fine or use Tommy's Proma config.
We've just we've been trying to push the boundaries in an experimental way with plasma to build a better linuxcnc mouse trap.
I think my max speed is 21 metres/min. I never actually tested it out but that seemed fast enough as not much needs > 6 m/min.
Your 5i25 was a pretty wild hackcould you have used a right angle header to lay it down?
It has a slot for a sideways pci riser but I didnt feel like researching it.
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26 Jul 2018 04:45 #114856
by bevins
Replied by bevins on topic Acceleration not high enough?
Im doing a control panel for the plasma. What buttons are needed for a plasma?
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