EMCO EMC Interface.The project story.This project is the work of two friends Jerry Spaulding and David Foster.They both took the Portland Adult Ed.Machine Tool class in the fall of 2.Jerry because he had plans to build.D CNC machine and David because he just likes those types of.The class was taught by Joseph Bolduc.CNC machines. Jerry asked Joe about two EMCO Compact 5 CNC machines.Joe said they were donated several years.Not sure how to take a design to CNC Check out Scan2CADs guide to find top CAD, CAM and CNC control software and freeware.Plus, get your own free DXFsFor those.TV monitor, both of which greatly limit the.Jerry asked if he could try to modify one of the.EMCOs to control it by a PC.Joe said sure and thus the project was born.It. was also during this time that David volunteered to help out.Neither Jerry. or David have a background in machine tools, but theyre both excellent.Frontplatte.png/1' alt='Open Source Cnc Software Emc2 Company' title='Open Source Cnc Software Emc2 Company' />The first step was figuring out if this was possible.We found a. where someone had already done something remarkably similar, but it contained.So we looked elsewhere and.Yahoo Emco CNC Users group.We obtained some.We also got. a high resolution copy of the wiring diagram for the board interconnects which.During our research we found that the majority of.EMCO Compact 5 CNCPC machines had does it using.That is one way to go, but being the cheap.The goal of the project is to control the stepper motors, which in turn.X and Y axes of the cutting tool.The work piece is clamped into.Open Source Cnc Software Emc2 Company' title='Open Source Cnc Software Emc2 Company' />Transparent and open working environment.A challenging environment.An emphasis on competence and sense of ownership.Defined role expectation and freedom of.CNCzone. com Largest Forums for CNC Professional and Hobbyist alikePC.Using the maintenance manual.We removed the extraneous boards and started trying to figure out what to do.One thing that needed to be addressed was being able to turn the.These EMCOs came with keylocks and without the key you cant.Unfortunately Joe did not have the keys for the machines, so we.IO as if it was. This too a bit to figure out, but we labeled the wired and.Now the big red emergency stop switch is used.Of course if we had the key, we could have.Joe had obtained an old PC 1.GHz and I got an old 1.Jerry. installed the EMC2 Live CD on the PC, which is just a custom version of Ubuntu.Linux with EMC. This was our PC control setup.Jerry also created a breadboard.The Interface Board. Korean English Dictionary Free Download For Pc . The initial breadboard we used was based on information Jerry had obtained.Jerry created a custom parallel port interface to the breadboard cutting off.It took us many weeks of debugging many different issues, but we.EMC. Some. of the issues we had to deal with along the way were accidentily blowing the.A picture of the breadboard during this process is.Once we had a working breadboard, the next step was to transfer that.PCB for more compactness and reliability.David had created and.Long story short, it took several iterations of PCBs and several weeks.The numerous boards were.In. one case, all of the part connections on the board were a few percent too.PDF step to print the board masks and.DB 2. 5 connector that couldnt fit the board.It should also be noted that some parts of the circuit were re designed.Two. LEDs were also added for a visual check of PC and EMCO power.Circuit Explaination.The circuit is basically just some optoisolators and inverters.The. stepper motors we were controlling would be working in normal full step mode.Full step mode energizes two phases at any time according to the sequence.AB AB A B A B repeat, where A A and B B are the pairs of control.Since the control sequence.EMC will just output the A and B control signals for a.A and B in our. Since were controlling two stepper motors, EMC will.AXBX and AYBY. These signals.PC and are routed to the input of an optoisolator via a small.The purpose of the optoisolator is to electrically isolate the EMCO.CNC from the PC. This can prevent damage from occuring in the PC if there are.EMCO. The output of the optoisolator is on the EMCO.The signals are then routed to inverters and thus we now have.AX AX, BX BX and AY AY, BY BY these are the 8 control signals.Weve decided for the time being not to try to control the spindle motor via EMC.EMC so that it could use that information for threading and other.The Compact. 5 has two spindle encoders, located near the spindle.One encoder generates a signal once per.The other encoder has many slots in the encoder disk and will.I cant remember the exact number at the moment, but it.EMC more resolution of the spindle angle at any moment.These. encoder signals are pretty weak, so we routed them thru some free inverters in.These optoisolators go in the reverse direction and the output.PC power domain where they are connected to some pull up.PC. The other signals were dealing with are limit switches.EMC can home the.We added connections for up to 6 limit.PC inputs, two switches per.This was a limitation on the number of inputs on the parallel port.EMC to use. The plan is to attach 4 limit switches to the Compact.X limits and two for the Y limits.We did some preliminary tests.We took the easy route.PC power domain, so we didnt need to deal.The limit switches connect to the three input lines via.When the switches are activated, they will pull the.A schematic of the circuit that was created with Eagle CAD is below, along.PCB. The schematic, board and additional library for.Eagle CAD are available below as well.A freeware version of Eagle CAD is.Click on the schematic and board for.Spammers Denied Registration.Spammers Permanently Banned.Spammers submitted to Stop.
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