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Bernard: Can you explain this a bit better, Mill seems to be working properly according to reports. Is is possible that your pulse width is too low for the circuit? Steve reports proper operation in

Steve: Thansks, I did'nt realize it was lathe that had the problem, will retroubleshoot. Have already fixed the Mist/Flood thing this morning. Thatnks for the long outstanding reminder. Severasl

Thanks Todd: I'll check it out. Art www.artofcnc.ca

Didn't run it as such, I manually set speed on mill VFD with a pot. I just disconnected 10V & 0V wires to VFD and checked voltage, but I will try it tommorrow. I also have another fault, which is

Steve: Definitely noise on the step pin. When you jog, the DIR pin gets set and dosent change until you change diretcion, thats why it creeps in the last direction. Art www.artofcnc.ca

I was wondering if the possibility is available to separate the limit switches and the home switch. I seriously believe that there is a serious safety concern when the limit/home function is the

there same need <snip> I would welcome your thoughts on or off list how we could improve section 4.6 and appendix 4 of the Mach2MillManual. (Rev A1.8 in Files and download from www.artofcnc.ca)

Art, I'm gradually trying to sort things out here. When I first noticed problems I was running the kernel @35Khz, I then switched to 25Khz and got the figures I gave you. I have now re-started M2

Bernard: Yes, it is necessary to restart after changing frequencies. This is necessary to restart the engine timer. Also, if you tune the spindle in 35 Khz and then switch to 25Khz, you have to

I have found the same quandry myself. I my experience, the limit switches should be there to prevent damage to the machine, and in effect initiate an E-Stop condition. It realy dosen't matter which

Hi Tom,i was wondering if i could ask you some questions on the THC setup,i have decided to modify my machine and add a z-axis,can you help me on how the z axis is driven and how much travel should

Hi Art, Is it possible to combine the spindle step/dir axis with the rotary A-axis? The reason is that I'm thinking of using a servo motor as the spindle drive, but occasionally use it as an axis

Hi All, A warning to anyone using a LM2907/2917 Frequency to Voltage converter for spindle control. The chip data sheet does not specify an upper frequency limit, I have found that it is very non

give The Z axis is normally a leadscrew type drive although you could use other methods. The axis has to travel a short distance at relatively slow rates so a stepper type drive direct coupled to

Hi Tom,I know where I`m going with it now.Thank you. I`ve read in some post`s that there may be a ready built THC kit coming is this your design. Scot UK __________________________________ Do you

Gentlemen: I agree that the limit switches are there to save a crash and should do two things: Instantly stop the motors on all axis Issue an e-stop signal back to the software. In the best

wrote: Yes. Bob Campbell and the designer of the Sound Logic breakout card have partnered with me to offer a version of the THC. They are going to provide some additional features that will give

Excellent news Tom.As from today I am a registered user.it took along time to choose the software and I`m sure i landed in the right place. Thanks Scot --- caudlet <thom@...> wrote:

Art, And of course that was the problem, thank you. Sometimes when the floodwaters are rising you forget to paddle ; Frank Carpenter

Bernard - Can you explain this a little more, a circuit diagram might help? The National spec sheet shows it as pretty linear ie less than 0.4% across a 500kHz input range?? -- Steve Blackmore