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Author Topic: Home slave with Master + Gantry squaring  (Read 216 times)

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Home slave with Master + Gantry squaring
« on: November 07, 2018, 01:17:01 AM »
Hello, im Rok from Slovenia and new to CNC and Mach3 but learinig a lot along the way (getting expensive  ;D ). 

Im building a "classic" gantry CNC router that will be mainly used for cutting aluminium. The CNC has two 20 mm ballscrews on X axis (Slaved A axis).
Im using UC400ETH motion controller, KK01 breakout board, 4x CW5045 drivers and NEMA 23 motors. Im using Mach3 on Windows 10.

The first problem:

If i jog the machine it works great. If i "REF ALL HOME" it only moves one of the X axis (it doesn't home the slave A axis). it does move the Y and Z to this is not the problem. The Home Slave with Master Axis is checked under General config.
Any ideas?

Second "problem" - more of a question:

For testing im just using normal NC micro switches on the 3 axis connected in series. I am planning to have 3 main switches on the three axis and add one more on separate Pin to square up the gantry. So can i just add one switch or does the BOB or Mach3 need separate Pin for X and A (slave) axis homing plus extra Pin for the two remaining (Y and Z) axis?

I will be upgrading the machine to inductive proximity switches all round and will have limit switches on both sides of all the Axis for safety purposes.

Thanks for the help, Rok.




 
Re: Home slave with Master + Gantry squaring
« Reply #1 on: November 12, 2018, 06:27:00 PM »
I thought the Y was the one with two motors and one of them Slave? Thats the way it is on mine anyway.
Retired Master Electrician, Commercial HVAC/R Service and lots of Hobbys.

Offline ger21

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Re: Home slave with Master + Gantry squaring
« Reply #2 on: November 12, 2018, 07:29:43 PM »
You'd have to ask CNC Drive, but the UC400ETH may not support the Home Slave with Master option.. It may require a home switch on each axis.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Home slave with Master + Gantry squaring
« Reply #3 on: November 13, 2018, 06:08:49 AM »
Its possible...

I already upgraded it to two switches and it works great "out of the box" :)

I figured out the Pins too, it just needs separate inputs for the two limit switches. It can have more axis on one input.

wmgeorge: for me the X axis is like the machine is orientated towards me. Like a coordinate system, up-down is X, left-right is Y.

Offline ger21

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Re: Home slave with Master + Gantry squaring
« Reply #4 on: November 13, 2018, 07:44:29 AM »
Typically the long axis is the X, and this is usually the axis that the gantry travels along. Some manufacturers like to call them the opposite, but I think the axis along the gantry should always be the Y axis, with the X being the dual drive axis.

People typically call the gantry the X axis when they operate the machine facing the gantry. I operate mine from the side.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Home slave with Master + Gantry squaring
« Reply #5 on: November 13, 2018, 01:31:47 PM »
Typically the long axis is the X, and this is usually the axis that the gantry travels along. Some manufacturers like to call them the opposite, but I think the axis along the gantry should always be the Y axis, with the X being the dual drive axis.

People typically call the gantry the X axis when they operate the machine facing the gantry. I operate mine from the side.

   Both mine are the same distance.   X for me has always left right and Y front back on every machine I have owned. The machine I have now is the same? The software  XML file came in preset that way and it works. 
« Last Edit: November 13, 2018, 01:36:59 PM by wmgeorge »
Retired Master Electrician, Commercial HVAC/R Service and lots of Hobbys.
Re: Home slave with Master + Gantry squaring
« Reply #6 on: November 13, 2018, 01:52:28 PM »
Typically the long axis is the X, and this is usually the axis that the gantry travels along. Some manufacturers like to call them the opposite, but I think the axis along the gantry should always be the Y axis, with the X being the dual drive axis.

People typically call the gantry the X axis when they operate the machine facing the gantry. I operate mine from the side.

   Both mine are the same distance.   X for me has always left right and Y front back on every machine I have owned. The machine I have now is the same? The software  XML file came in preset that way and it works. 

   https://www.sherline.com/milling-machine-terminology/
Retired Master Electrician, Commercial HVAC/R Service and lots of Hobbys.

Offline ger21

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Re: Home slave with Master + Gantry squaring
« Reply #7 on: November 13, 2018, 03:09:17 PM »
Quote
X for me has always left right and Y front back on every machine I have owned. The machine I have now is the same?
It just depends on where you are standing.
X is always left to right.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html