Messages

5061

Mach4 General Discussion / Re: XHC Mach4 USB motion board warning and info

« on: March 12, 2018, 05:26:51 PM »

Hi Louis,
as you can see very few have had any luck with these boards. The question is 'is the favourable price differentinal
sufficent to justify the difficulties and lack of support that they represent?'

Craig

5062

G-Code, CAD, and CAM discussions / Re: Mach3 reads in cm and not in mm in Gcode file...

« on: March 12, 2018, 06:00:30 AM »

Hi,
or provide the correct and accurate data and calculate the correct answer...no guess work....no measuring...

Craig

5063

General Mach Discussion / Re: Motors keep adding steps

« on: March 11, 2018, 11:46:54 PM »

Hi,
OK then you are going to have to replace probably the BoB to make it work.

Do you have manufacturers documentation for both the BoB you already have and your stepper drivers?
I'm hoping there might be a simple solution.

If your budget is tight then you may have to consider making an amplifier solution....one IC...$4.00 or so
and 2 sq inch of vero board...not that hard.

Craig

5064

General Mach Discussion / Re: Motors keep adding steps

« on: March 11, 2018, 10:21:02 PM »

Hi,
if your stepper drivers handle 3.3V input you'd be fine. Your description rather sounds like the drivers
are not reliably operating with 3.3V inputs however. One possibility is to change the drivers, another is to
change the BoB to one that produces 5V outputs and yet another alternative is to use an amplifier between
your BoB and the drivers. One hex buffer IC would do step and direction for a three axis machine.

Hows you electronic skills?

Craig

5065

G-Code, CAD, and CAM discussions / Re: Mach3 reads in cm and not in mm in Gcode file...

« on: March 11, 2018, 06:33:59 PM »

Hi,
yes, there is no 'cm' setting in Mach, what it means is your 'Steps per Unit' value in the motor tuning pages is out
by a factor of 10.

Try getting this info:
1) The lead screw pitch, needs to be accurate, 'about 1/4 per turn is NOT good enough, real accurate,from manufactuers
     documentation preferred.
2) Belt or gear reduction ratio, if fitted, between the stepper and the lead screw.
3) Your microstep setting of your stepper drivers
4) I assume standard two phase stepper of 200 step per revolution?

Craig

5066

General Mach Discussion / Re: Servio motor Delta adas b2 Software and electronic gear ratio

« on: March 11, 2018, 05:58:00 PM »

Hi,
try this from the manual:

P1-45▲ GR2 Electronic Gear Ratio (Denominator) (M) Address: 015AH
015BH
 Operation
Interface: Keypad/Software Communication Related Section:
Section 6.2.3
 Default: 10
 Control
Mode: PT
 Unit: pulse
 Range: 1 ~ (231-1)
 Data Size: 32-bit
 Display
Format: Decimal
Settings:
This parameter is used to set the denominator of the electronic gear ratio. The
numerator of the electronic gear ratio is set by P1-44. P2-60 ~ P2-62 are used to set
the additional numerators.
As the wrong setting may cause motor to run chaotically (out of control) and it may
lead to personnel injury, therefore, ensure to observe the following rule when setting
P1-44, P1-45.
The electronic gear ratio setting (Please also see P1-44, P2-60 ~ P2-62):
f1 f2 = f1 x N
M
N
M
Pulse input
Position
command
The electronic gear ratio setting range must be within: 1/50<N/M<25600.
Please note:
1. In PT mode, the setting value of P1-45 can not be changed when the servo drive
is enabled (Servo On).
The electronic gear function provides easy travel distance ratio change. However, the over
high electronic gear ratio will command the motor to move not smoothly. At this time, the users
can use low-pass filter parameter to improve this kind of situation. For example, assume that
the electronic gear ratio is equal to 1 and the encoder pulse per revolution is 10000ppr, if the
electronic gear ratio is changed to 0.5, then the motor will rotate one pulse when the command
from external controller is two pulses.
For example, after the proper electronic gear ratio is set, the reference travel distance is 1

Note that the formula expressed is not displayed correctly in the quote. Read the manual.

Craig

5067

General Mach Discussion / Re: Servio motor Delta adas b2 Software and electronic gear ratio

« on: March 11, 2018, 05:47:53 PM »

Hi,
electronic gearing is a means of controlling or setting the number of input pulses necessary to produce a
movement  of a number of encoder counts.

If you had a signal generator producing a steady 1000 pules per second then with no gearing (default
10,000 count encoder) it would move 1/10 rev per second.
As you increase the electronic gearing it will get faster, that is that the same 1000 pulses will cause an
encoder count movement of 20,000 say or 2 revs per second.

You can set both nominator and denominator equal and that means that one input pulse causes movement
of one encoder count. Whether you set them both at 16 (or 10 or 1 or 57....) doesn't matter.

If you are going to do some testing use Mach3 to produce the pulses but don't alter it otherwise you can't be
sure what it is thats changing.

Craig

5068

General Mach Discussion / Re: 540 error light

« on: March 10, 2018, 03:55:54 PM »

Hi,
I was reading the 540 manual the other day and it suggested that a motor fault could cause a continuing 540 Error light.
May I suggest unplugging all the motors and try again. It might be a motor rather than the 540.

Craig

5069

Mach4 General Discussion / Re: New people welcome !! Come in here and introduce your self!

« on: March 09, 2018, 10:07:34 PM »

Hi,
place a post about the problem on the main Mach3 board.

Craig

5070

FAQs / Re: tool path problems?

« on: March 09, 2018, 10:04:39 PM »

Hi,
sounds like your Z axis is going up instead of down. Try reversing the direction of the Z axis in Ports & Pins.

Craig