Magnets dont like heat - neodymium magnets can permanently loose part "power" if exposed to temperatures over 80 Celsius.
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Type: Posts; User: grg12
Magnets dont like heat - neodymium magnets can permanently loose part "power" if exposed to temperatures over 80 Celsius.
See:...
What collet type are you using? If its ER - are you sure its istalled correctly? ("click in" empty collet in nut then slide endmill in).
Maybe it's obvious but some people don't get it first time...
When i cut soft aluminium (hardware store grade) i always spray it with ethanol spirytus (cheap stuff sold as paint thinner or grill lighter fluid). It helps a lot - even if applied from hand...
I was standing with oscilloscope probes in hand over controllers board - connected to mains and some lightbulbs (dummy load). I wanted to see what's going on... then I remembered that this "light...
Do not connect random condensators parallel to motor. It may destroy switching elements on controller board.
PWM controller used in this type of application switches output between full supply...
Check if chips on controller board have readable numbers (on my board all chips had identifiers ground off). If yes - try to Google them, they probably used standard pwm controller - there is chance...
Thiner wire means higher resistance - if the wire is too thin (or too long) driver won't get enough current for steppers.
To get some "feeling" about appropriate wire gauge lookup this table:...
Hallo
You wrote that "low current" mode can be activated by dip switch - i guess a small relay can do it too? Of course it will require opening the drive and "hacking" it a bit with additional...
I don't have this type of spindle - i don't know what supply voltage it uses or how to calculate correct condensator value. If there is no recommended condensator type for this spindle - i would just...
First photo suggest that power cables of spindle are far away from any other cables - thats good. What i don't like - spindle uses single lead cables and they are far from each other creating large...
Clear "hobbyglass" is polystyrene - cheap but quite unpleasant to work with - tends to melt and stick to tools. No idea what laser will do to it.
He used transformer power rating to roughly estimate maximum amperage - worst case scenario. Number you get from this equation is higher (larger "sag") than i Praxis since equation assumes capacitors...
I guess x axis is not perpendicular to y axis. Probably you need to adjust x axis motors independently till all corners are square
Glass is quite impervious but what about markings? One scale that i disassembled had some sort of metalic way markers - looked like vapour deposited and etched. It didn't looke like gold - no idea...
I guess they actually break electrical contact when touched.
Cheapest option - piece of drill rod with small ballbearing pressed (or glued) at end :) I have miniature edge finder from proxxon (with 6mm shaft) but in most cases i don't bother with using it...
Yes - but even with max value pulses were too short for my hardware - eventually i scrapped the board and build new one with faster optocouplers. "Slow" board used cheap LTV827 optocouplers, "fast"...
I must admit i didn't measure linuxcnc - just mach.
Generating spikes is easier that square wave - all you need to create spike is to set and immediately clear port. For square wave you need to...
I don't know how today's software behaves but 10years ago mach and linuxcnc outputed series of short spikes - not a 50% square. I designed and built breakout board with optoisolation only to...
Laptops are bad choice for systems controlled through parallel port where computer must maintain precise timing for step generation. Most laptops have built in power consumption reducing devices that...
Hmmm as far i know 250v/10A fuses should reliably blow at 10amps /120v (or even 12v ). 250V ratings means that you can use them on 250V mains - they should not "hold" arc after blowing. Automotive...
I switched to linuxcnc - but, honestly, i just started to collect hardware for grbl. I don't have any more spare old computers with lpt port left...
Sorry - i somehow misinterpreted the drawing. Thought its a long thin spindle not a ID of sleeve. In that case it should be tan(90-7)/(pi×diameter )
Tangent of groove angle is equal to part circumference divided by one thread length. Therefore threads per inch will be tangent (7)/(pi×diameter) . But i don't guarantee it's correct. My reasoning -...
Slitting saw?
About lead hammers - i heard juwleliers don't use them beacuse they leave residue - if contaminated gold is heated (soldered) residue creates hard to remove stains.
Word "Sketch" is often used to describe programs written for arduino controller. I assumed they choose this name because "sketch" sound less intimidating than "source code" :)
My private...
Coder is not the same as programmer. Just as machine operator is not the same as machinist.
And "sketches" are less scary for kids☺
Ok, that explains a lot
I looked dataschet of this chip - i think you can use it to drive unipolar motor. But it won't be easy
Attached schematic schows basic idea how chopper circuit work - not a practical device. The only reason to build it will be school exercise - and even then it will require many additional components....