Advanced Search

The THCAD2 is scaled the same as a THCAD-10 when jumpered
for 10V full scale and scaled the same as a THCAD-5 when jumpered
for 5V full scale.

I am unable to figure out how to use the engraver-1 python program. If I try python engraver-1.py I get:
File "engraver-1.py", line 1
>
^
SyntaxError: invalid syntax

I am running it as downloaded:
python engrave-1,py

Can you run the drivers with the motors disconnected (turn the power off before disconnecting the motor)?

Don't make a separate simulation, you might end up with slight differences, which will wreak havoc!

before i do this, should i modify the 'steps per revolution' in the arduino code?

For the capacitor, are we just trying to smooth the input?

That makes sense. Thanks. I always use the "Autovolts" option and has always been good enough but in this case there are complications that I have to catch so the manual calibration is required.

Maybe buy this and see if it works:
www.aliexpress.com/item/1005005261850374.html

It's so cheap, you may as well.

Having a backup is helpful when troubleshooting.

Your driver is probably too small.

It's only rated for 2.8A peak. Your motor is rated for 2.8A RMS (4A peak).

You should have a 4A driver, not a 2.8A one.

You don't necessarily need full motor current, per se.

I actually recommend setting the driver current slightly below the rated current to reduce motor heat, if you can get away with it.

But maybe you can't get away with it!

Try this:

Set the driver to max current, fewest microsteps (lowest number of steps/rev).

Set the power supply to max voltage (not over 45VDC) and max current.

Try putting the biggest capacitors rated for above the supply current across the power input terminals to filter the power supply.

I currently have it on my test bench with a DC power supply set at 24v. Depending on what is doing it typically is drawing around 0.25A. if i turn the current knobs on the power supply it doesnt increase at all.

I have the switch on the driver set to D which according to the data sheet is 2.8 peak or 2 RMS which is alot more than its pulling. Should i switch this to 0-4 according to the datasheet thats about where my current draw is.


I just tried plugging 625 into the arduino code (its not on the machine yet) and its about 1.125 spins.

this is the process I followed to set up a hyperterm 85 SYNC
1 Make sure the Z axis is properly calibrated including trabvel switch if any.
2 Make sure table is properly laveled, so the plate to cut is always perpendicular to the torch
2 From hyperterm Cut tables select a metal plate in the midle range of the plasma power supply and set up the parameters in the proper tool.
3 Disable any THC feature including THC itself.
5 Cut a line of a length that allow you to record the voltage on the screen (May be 8 or 10 inches long), using the previusly ste tool.
6 Adjust the voltage scale to reflect the voltage in the cut table for that cut heigh.
You can repeat with a thicknes on the high range and then one in the low range and then make an average.
this method has worked to me don't need to many maths but for sure should be anothers that work.

What voltage is your driver powered with?

What is the drive current set to?

What type of PSU is powering the driver?

Old-school transformer -> rectifier -> capacitor supplies are generally recommended over regulated power supplies.

Try getting some big caps that are rated for more than the supply voltage and soldering them to a proto board and power the driver through the board to see if power supply instability is part of the issue.

Perhaps filtering the power supply will fix, or reduce, the issue.

Low voltage and/or current can lead to lost steps which will cause weird stuff to happen.

Try out 625 for the steps/rev in stepconf.

Number of teeth might not work.

Enter this in stepconf:

Driver microstepping: 8(maybe 4)
Motor steps/rev: 600

Why the hell would the ratio be 37.49:11.99?

Why not 36:12 (3:1)?

So strange and annoying.

Also... Here is the LinuxCNC post processor from Inventor.

Hi Friends, 


- yes its a hybrid stepper, sorry for the misnomer, i've attached the data sheet of the motor and the drive.

I am using a GT2 timing belt and timing pulleys i got off amazon. The pulley ratio expressed as a fraction is 37.49/11.99. I just realized i should probably use the number of teeth instead which brings that fraction to 60/20 or 3, but this still doesnt get me to the 540 number any easier. How would one measure the pulley ratio with the actual belt? 

I was hoping that the belt system i designed wouldn't slip THAT much. I only have it rotating one way, as belts are good pullers not so good when it comes to pushing. I mean i even have a custom tensioner in there. I can upload cad photos if necessary.

So because i took the head off to redesign it i haven't put it back up on the machine and reset up the drive, all the numbers i am sharing are coming from the little Arduino script i wrote to test this.