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Messages - Tweakie.CNC

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5651
General Mach Discussion / Re: Mach Just Stops
« on: April 13, 2011, 02:29:41 AM »
Dave,

Just the top box.
Interesting to see if the problem is noise related or if this makes any difference.

Tweakie.

5652
Hi John,

I think you have just discovered the reason your proximity switches were disconnected in the first place.  :)

The C10 pull up / pull down unfortunately applies to all input pins and adding a resistor will not solve the problem.
As I see it you could either.........
1) Do a bit of sugery on the BoB to remove the pull up resistor which is associated with the pin you use for the estop or possibly.........
2) Swap the estop switch from one with normally closed contacts to one with normally open contacts and reconfigure your active hi / low within Mach (incidentally I use normally open contacts on my estop and limits).

Given the choice I think I would go for the surgery but then electronics is my thing.  :-\

Tweakie.


5653
General Mach Discussion / Re: 3 Parallel Port cards??
« on: April 13, 2011, 02:00:22 AM »
No reason why you cant just take them all to +5 Volts.

There are some occasions when I wish to disable just one axis.

When working on long jobs (longer than the working table) I produce the artwork in one piece and with a pause in the GCode at the appropriate point I disable the Y axis, release the work (which remains in the same place) whilst the table is moved by hand to the new location. The work is re-clamped, the axis enabled and the job restarted. I have tried various other methods and this system works best for me when making long signs.

When I use the laser head, the Z axis carries the focus lens assembly and once set remains the same for the entire job. I use standard engraving GCode and therefore any Z commands will alter the focus so disabling just the Z axis prevents this.

There are other occasions but it is one of those things that once you have it then you find the uses for it.  ;D

Tweakie.

5654
Update.

Looking at my VFD instructions - you probably don't need the potentiometer as frequency is variable from the front panel - with luck yours should be the same.

Tweakie.

5655
But I am not sure it's any good without the VFD setup details because the default setting may enable too much current through your spindle so keep a close eye on the return water temp.

In practice the minimum connection is the 220V input, the spindle(U.V,W), the potentiometer between AM and ACM, and relay or switch between FOR and DCM

Tweakie.

5656
Here are the connection details but as Hood has said you need the manual for firmware setting the max motor current etc.etc.
Surely no one would supply a VFD without the connection and setting-up details would they ?.

Tweakie.

5657
John,

I would suggest you contact Shopbot regarding the proximity switch wiring for the type of switch you have fitted as some may require a pullup or bias resistor connected to operate correctly with the Mach input. If they don't know, or are uninterested, then if you have the make and type number for your prox. switch I should be able to identify the wiring requirements.

If you change the kernal speed to reduce your pulsing frequency you will also need to re-tune your stepper motors, unless you are happy doing this (not difficult really) then my advice is if it ain't broke.....

Tweakie.

5658
General Mach Discussion / Re: 3 Parallel Port cards??
« on: April 12, 2011, 07:33:57 AM »
If its any help I have taken all enable lines through toggle switches (mounted on the controller case) to +5 volts  and this allows an axis to be disconnected if required for any purpose.

Tweakie.

5659
The type 2200 is a 220 Volt, 400Hz, 3phase spindle which, as you have discovered does indeed require the VFD to operate.
If you wish to control the spindle from Mach you will also need the C11 breakout board as this can provide the 0 to 10 Volts analog speed signal for the VFD which is derived from the Mach PWM spindle output and also the on / off switch control for the VFD (unfortunately the C10 is a bit lacking in this department).

Hope this helps.

Tweakie.

5660
Mach SDK plugin questions and answers. / Re: Impact engraving plugin
« on: April 12, 2011, 03:58:37 AM »
Obal,

Please excuse me if I am wrong but I think it is you that has the older software version.
The aspect ratio box was removed from the latest version although it was still defined as version 2.00.075 (bit confusing perhaps)

Tweakie.


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