When I started the thread, my motivation was to share knowledge and to encourage others to proceed. The CPLD code worked well enough for a basic driver. I don't think there is a compelling need for...
Type: Posts; User: H500
When I started the thread, my motivation was to share knowledge and to encourage others to proceed. The CPLD code worked well enough for a basic driver. I don't think there is a compelling need for...
If you connected or disconnected the motors with the power on, you probably fried the chip. The chip cost more than the driver, so it is not worth fixing. Buy another.
The benefit of a driver like this, is that it turns a stepper motor into a brushless servo, without much increase in cost. An optical encoder will often cost more than the motor, making it hard to...
I came across a very interesting project on Kickstarter:
https://www.kickstarter.com/projects/tropicallabs/mechaduino-powerful-open-source-industrial-servo-m?ref=category
It's a servo stepper. ...
It won't work. There are errors.
-add a pull up on u4 pin1.
-swap vpot and vres
-add a 20 uS time delay between u4 pin 1 and U3. Otherwise it will chop too fast.
The circuit won't work. The top part of the h-bridge must be driven with a high side driver. I posted a design for a cpld based stepper several years ago. I've attached the schematic. You can...
Can you post a larger image? The text is not readable.
If the dm542 is set to 1600 pulse per rev and your screw is 5 rev per inch, then Mach should be set to 8000.
I am using a 5 turn / inch ball screw and a 1.6x gear reduction for the z axis. I'm using a gas cylinder, but it is not needed for my speed setting of 100ipm. It's main purpose is to prevent the...
I mean the H version. Although the low speed torque will be lowered, it will maintain the torque at higher speeds. This is usually far more useful.
The driver will limit the current.
I recommend the M version with the lower inductance.
Why are they called essential oils when they are not actually needed for anything? :)
What voltage is your power supply? Are you sure the current is actually 2.5A? Low voltage + high current can cause the diode to overheat.
That diode prevents damage in case you accidentally...
I never heard of drives becoming unstable, unless the inductance was so low that the drive could not handle it. I tested 1.7 mH motors with 60v without issue. The main drawback is that the motor...
The sampling rate for those scopes is far too low. The Rigol ds1052e or something similar is better. Or a used scope. I know someone selling a TDS640A (500Mhz, 2G/s) for around $1000.
I have no problem lifting a 115lb milling head, using a ball screw and a 280oz in motor.
The em705 is better, since you want to use 48v. There's less chance of damage due to high voltage.
Why don't you calculate how much torque you need before spending money on the big motors? It's a simple gear ratio calculation. Assume you need at least 100 lbs of downward force for drilling.
I forgot that it was 5 phase. The 6600 won't work.
Are you certain it is 5 phase, rather than 2 phase with 5 wires?
If you are open to other solutions, the tb6600 would be much easier and better.
Why not use a higher gear ratio, 10:1 or more? You can achieve that with a chain drive.
When you turn on the coil transistor, the current rises quickly. Your execution loop must be fast enough to check each coil and shut off the current as soon as the set value is reached. Otherwise,...
Look for loose connections.
Other programs, such as a web browser, could interfere with Mach.
Reinstalling the OS might help. Sometimes the loaded drivers can interfere with mach.
If all 4 chips are out, verify that the board is drawing no current from vma and vmb.
Measure the voltage on vcc. I believe it should be 5v. If it is then reconnect one 6560 chip back in. If it...
Use a tb6600 instead of the 6560. Most 6560 boards are garbage.
Why do you need mach3 for 1 axis?. An arduino nano running GRBL will be able to coordinate up to 3 axes over the usb or serial...
Performance will be very poor unless your power supply voltage is high enough (around 35-40v). The chopping frequency should be around 20khz., and your code must be fast enough, or the current will...
One or more of the other chips might be dead. When you fried the z chip, the internals likely shorted the high voltage into the 5v and killed a who bunch of stuff. Try removing power to each chip...
The tb6600 is much better. They also have faults, but nothing nearly as serious.
Scope the signals. That's the sure way to find out where the problem is.
What do you mean by snubber? The recirculating diodes? They are not needed. The problem is the Mao Zedong class engineering. There are countless design errors. Unless you are willing to address...