Remora - ethernet NVEM cnc board
02 Dec 2023 21:56 - 02 Dec 2023 21:59 #287051
by rbobey1989
Replied by rbobey1989 on topic Remora - ethernet NVEM cnc board
Ok Guys, today I can say that I feel a little better in spirit because I have achieved interesting things.
Firstly, searching through some boxes I found our ADUM1200 level shifters that I bought on Aliexpress a while ago from 5V to 3.3V, I downloaded the datasheet and the first thing I read """""High data rate: dc to 25 Mbps"""" "WoooooW just what I need to improve the encoder pulses, so I decided to do some DIY, I have made a simple but illustrative sketch of how the schematic turned out, I also attached a capture of the waveforms for the A/B signals 3V3, I honestly didn't expect to have such clean signals.
After this I was able to change the 50cpr disk again for the 1000cpr one in the encoder, the first test was carried out in open loop at 7500mm/min to verify that counts were not lost, which happened before from 1500mm/min with the 1000cpr disk, the first results were satisfactory, the count was correct so I went on to configure the closed loop and adjust the PID controller, after several tests I leave you a of one of the execution tests, sorry for the audio I performed the video with my phone, also the table where I have the motor is decorative hehehe vibrates beautifully (the motor runs like silk).
It would be interesting to look for some 5V-differential-inputs to 3V3-single-ended-output driver and make a small pcb with 12 channels, of course I would have to do some DIY but not the madness that I have right now on my EC500 hahaha.
Scott I have to update a couple of minor changes in the qdc module since the WHA and WHB pins were incorrectly multiplexed towards XBAR1 file qdc.cpp lines 87 to 98:
[/code]
Firstly, searching through some boxes I found our ADUM1200 level shifters that I bought on Aliexpress a while ago from 5V to 3.3V, I downloaded the datasheet and the first thing I read """""High data rate: dc to 25 Mbps"""" "WoooooW just what I need to improve the encoder pulses, so I decided to do some DIY, I have made a simple but illustrative sketch of how the schematic turned out, I also attached a capture of the waveforms for the A/B signals 3V3, I honestly didn't expect to have such clean signals.
After this I was able to change the 50cpr disk again for the 1000cpr one in the encoder, the first test was carried out in open loop at 7500mm/min to verify that counts were not lost, which happened before from 1500mm/min with the 1000cpr disk, the first results were satisfactory, the count was correct so I went on to configure the closed loop and adjust the PID controller, after several tests I leave you a of one of the execution tests, sorry for the audio I performed the video with my phone, also the table where I have the motor is decorative hehehe vibrates beautifully (the motor runs like silk).
It would be interesting to look for some 5V-differential-inputs to 3V3-single-ended-output driver and make a small pcb with 12 channels, of course I would have to do some DIY but not the madness that I have right now on my EC500 hahaha.
Scott I have to update a couple of minor changes in the qdc module since the WHA and WHB pins were incorrectly multiplexed towards XBAR1 file qdc.cpp lines 87 to 98:
case 7:
IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B0_04_GPIO3_IO16, 1U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_04_GPIO3_IO16, 0x10B0U);
XBARA_SetSignalsConnection(XBARA1, kXBARA1_InputIomuxXbarInout08, kXBARA1_OutputEncInput);
break;
case 8:
IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B0_05_GPIO3_IO17, 1U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_05_GPIO3_IO17, 0x10B0U);
XBARA_SetSignalsConnection(XBARA1, kXBARA1_InputIomuxXbarInout09, kXBARA1_OutputEncInput);
break;
Change them to:
[code] case 7:
IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B0_04_XBAR1_INOUT08, 1U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_04_XBAR1_INOUT08, 0x10B0U);
XBARA_SetSignalsConnection(XBARA1, kXBARA1_InputIomuxXbarInout08, kXBARA1_OutputEncInput);
break;
case 8:
IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B0_05_XBAR1_INOUT09, 1U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_05_XBAR1_INOUT09, 0x10B0U);
XBARA_SetSignalsConnection(XBARA1, kXBARA1_InputIomuxXbarInout09, kXBARA1_OutputEncInput);
break;
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