RS485 For Hypertherms
13 Jan 2021 19:35 #195235
by snowgoer540
Replied by snowgoer540 on topic RS485 For Hypertherms
Here's Hypertherm's official stance on the matter:
Which I take to read as "it's possible, but we wont support it, try at your own risk, YMMV". Or maybe "We dont recommend this because it makes nice cuts that way and we cant sell you the good stuff then."
Either way, I do know one of the CNC controller brands that uses linuxcnc has this feature. So, it must be possible/they think it works well enough, but I 've not experienced it.
I do admit, I do find it intriguing and I wouldn't mind experimenting with it to see if it's worthwhile, worst case would be it doesn't work.
Which I take to read as "it's possible, but we wont support it, try at your own risk, YMMV". Or maybe "We dont recommend this because it makes nice cuts that way and we cant sell you the good stuff then."
Either way, I do know one of the CNC controller brands that uses linuxcnc has this feature. So, it must be possible/they think it works well enough, but I 've not experienced it.
I do admit, I do find it intriguing and I wouldn't mind experimenting with it to see if it's worthwhile, worst case would be it doesn't work.
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13 Jan 2021 19:55 #195241
by alexandrub
Replied by alexandrub on topic RS485 For Hypertherms
Me too! I am on the list for testing if somebody make the communication. In the last discussion the problem was that the delay is big on rs485 com, but if the delay is in milliseconds, i don't think is so important 
for cutting
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13 Jan 2021 21:16 #195251
by rodw
I think it will be important. My table gets to 10.24 m/min in 30 ms. at a more normal 2-3 m/min its only slowing for 10 ms
The Telwin machines provide 0-10 v control of current
The Thermal dynamics have a potentiometer that controls current. It could be used for such control if replaced by a digital pot.
Grotius has done this.
The big plasma cutters provide control by the ethernet bus hence ethercat prevails.
I am sure Hypertherm have restricted the baud rate to preclude this being done on low end machines.
In a perfect world you would swap from maintaining constant voltage by altering height to maintaining constant voltage while varying current while decelerating and accelerating.
Replied by rodw on topic RS485 For Hypertherms
Me too! I am on the list for testing if somebody make the communication. In the last discussion the problem was that the delay is big on rs485 com, but if the delay is in milliseconds, i don't think is so important
I think it will be important. My table gets to 10.24 m/min in 30 ms. at a more normal 2-3 m/min its only slowing for 10 ms
The Telwin machines provide 0-10 v control of current
The Thermal dynamics have a potentiometer that controls current. It could be used for such control if replaced by a digital pot.
Grotius has done this.
The big plasma cutters provide control by the ethernet bus hence ethercat prevails.
I am sure Hypertherm have restricted the baud rate to preclude this being done on low end machines.
In a perfect world you would swap from maintaining constant voltage by altering height to maintaining constant voltage while varying current while decelerating and accelerating.
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