Re: Is there any reason for missed steps only at low speed
Hi MKSA, I have done a huge range of speeds and protocols and think it unlikely to be the microswitch. At the moment I am trying to set up an encoder to compare exactly what is happening at the...
View ArticleRe: Is there any reason for missed steps only at low speed
22 pulses difference doesn't sound like a binary error ( 8-16-32 pulses would be a hint ), but nevertheless did you try to store the stepcounts in an array instead of using the same register back and...
View ArticleRe: Is there any reason for missed steps only at low speed
Quoteo_lampe 22 pulses difference doesn't sound like a binary error ( 8-16-32 pulses would be a hint ), but nevertheless did you try to store the stepcounts in an array instead of using the same...
View ArticleStepper driver SD6128
I’m using tmc 2130 with SPI interface in my kossel build the motors have 2.0A peak. I’m using 12v in my power supply. That driver are winey at 12v its goes very hot. I read that is good for a...
View ArticleStepper motor locks up when going higher than 8mm/s
Hello everyone. I'm having a problem with my stepper motor,it appears to lock up on speeds higher than 8mm/s. It's only my Y axis motor that does this,my Z axis uses the same motor and stepper drivers...
View ArticleRe: Stepper motor locks up when going higher than 8mm/s
From your video it looks as if your printer does not use pulleys and belts, but uses standard threaded rods (M8?) for the X/Y linear movements... If so, have you calculated the actual step rates...
View ArticleRe: Stepper motor locks up when going higher than 8mm/s
Interesting,I'll try reducing the microstepping. But why does the motor lock up even without it being hooked to the screw?
View ArticleRe: Stepper motor locks up when going higher than 8mm/s
The problem also occurs if I connect the X axis to the Y axis output so I doubt it's a mechanical issue
View ArticleRe: Stepper motor locks up when going higher than 8mm/s
Please explain us the mechanical setup of your axis. What belts/pulleys resp threaded rods are you using on which axes? How is your setting of STEPS/mm for the axes in Marlin's Configuration.h?
View ArticleRe: Stepper motor locks up when going higher than 8mm/s
X has a belt I have no info on and Z and Y run on M8 threaded rods. I have calculated the steps/mm by sending commands to move 10 mm and then adjusting accordingly. Here are my current settings
View ArticleRe: Stepper motor locks up when going higher than 8mm/s
The problem is your very high value of 2048 steps/mm on the Y axis. To achieve a good movement speed with that steps/mm, you will need a combination of fast electronics and firmware to generate the...
View ArticleRe: Stepper motor locks up when going higher than 8mm/s
But why does my motor lock up even while not hooked to the rod as seen in my video?
View ArticleRe: Stepper motor locks up when going higher than 8mm/s
Quotehermanelfino But why does my motor lock up even while not hooked to the rod as seen in my video? Probably because there is not enough supply voltage to run the motor that fast. Reducing the Y...
View ArticleRe: Stepper driver SD6128
You treat any driver that comes without SPI, like a standard Pololu driver: You set the Vref via potmeter and calculate steps/mm according to the jumper settings inside the driver socket. Then change...
View ArticleRe: Stepper motor locks up when going higher than 8mm/s
But if I connect an even smaller motor to the Y axis driver it locks up as well. I'm really confused as to why this is happening
View ArticleRe: Stepper motor locks up when going higher than 8mm/s
If the smaller stepper motor has high inductance, the same considerations will apply. There is a calculator at reprapfirmware.org to calculate the speed at which torque starts to drop. Have you tried...
View ArticleRe: Stepper motor locks up when going higher than 8mm/s
Hermanelfino, have you checked the Wiki page about maximum step rates? IMHO you are simply trying to operate the M8 Y-axis at a step rate which is way to high for the Marlin/Mega setup you have. With...
View ArticleNew Pololu-Style driver ST820
Hi, on some aliexpress stores a new Pololu-Style driver with ST´s ST820 chip has popped up. It supports driving your motors with up to 45V which is kind of massive (would be cool for Nema23 in CNC...
View ArticleRe: New Pololu-Style driver ST820
This is a pololu product that someone has cloned... [www.pololu.com] It has very low current... see comparison table [www.pololu.com]
View ArticleRe: New Pololu-Style driver ST820
The biggest problem with any of those modules is that they can't dissipate enough heat to let you run any but small motors at rated torque. Add an easily broken current setting pot (and who knows how...
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