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| DDCSV1.1 4 Axis controller |
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| JHovel:
Thanks for those answers and explanations! More reading to go before it makes better sense.... :beer: |
| Pilotltd:
Why would having an FPGA mean automatically mean it’s smoother and more accurate? CW40’s 12000 mm/min and a resolution of 0.001mm is more than any hobby level mill or router is likely to achieve in the real world. It has a more expanded control set and much more I/O and runs no less smoothly on identical machine using same parameters as the DDCSV. It shouldn’t need to be hack able when the software and firmware are up to scratch ;) |
| Benedikt:
--- Quote from: Pilotltd on January 31, 2018, 03:17:27 PM ---Why would having an FPGA mean automatically mean it’s smoother and more accurate? CW40’s 12000 mm/min and a resolution of 0.001mm is more than any hobby level mill or router is likely to achieve in the real world. It has a more expanded control set and much more I/O and runs no less smoothly on identical machine using same parameters as the DDCSV. It shouldn’t need to be hack able when the software and firmware are up to scratch ;) --- End quote --- It's simply the way the step generation works. An FPGA can do many parallel tasks at the same time and take load off the CPU. There is also way more accurate timing since the CPU is not shared between G-Code decoding, screen updating, user interface tasks, USB stack, operating system and then the real time step generation. In the DDCSV1.1 the CPU sends blocks of motion data directly to the FPGA that handles the entire step generation process smoothly and in parallel. Also, I would not really trust any specs on Aliexpress or other Chinese sites. They are often multiplied by a factor between 2 and 10. Not all vendors do that, but many definitively do. Apart from that, there is jitter and other bad effects from CPU based step generation, that are (almost) not present when dealing with an FPGA driven system. Chinese software is never up to scratch. They make very good hardware, but the software very often is just really poor. I am sure this may improve over time, but we are not there yet at all. Again, this does not apply to everything, but to a rather large amount of products. |
| Pilotltd:
Not just Chinese companies Benedikt - VW :) I have tested the CW40 and the specification is correct as given by AliExpress seller CNC Workshop. What is the latest factory software revision - on your web site you have v87 - my DC has version 88NOR which is a few days later release than 87. I was going to update to the Pandora version but not sure if it has any advantages. |
| Benedikt:
--- Quote from: Pilotltd on February 01, 2018, 05:29:11 PM ---What is the latest factory software revision - on your web site you have v87 - my DC has version 88NOR which is a few days later release than 87. I was going to update to the Pandora version but not sure if it has any advantages. --- End quote --- I would certainly not offer this modified firmware if it did not pose any advantages over the original one. ;-) For a full list of changes, head back a few pages ( here: https://madmodder.net/index.php/topic,11598.msg147430.html#msg147430 ). But in a nutshell, it's bug fixes, translation fixes and support of USB keyboards/keypads. And for the future, a plugin system is planned together with the original engineers, as well as support for more languages and different homing modes. Also, there is work in progress for updating the Linux kernel to add support for Ethernet to allow remote control of the CNC / remote g-code upload. If you are looking for the latest version, head back a few posts for a release from December, 26th. Should this version prove stable, it will be added to the Pandora installer and it will be patched with our other improvements. |
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