Originally Posted by jalessi  LegendCJS,
Did you call John at Keling, he may take a credit card over the phone.
630-254-8655
Jeff... |
I did call him and I learned that they have a normal credit card payment option that doesn't require having a paypal account. So now I have three KL23H286-20-8B steppers on the way. Thanks for the advice about the drivers I was interested in being unipolar only. And thanks for the phone number- it saved a lot of time.
To escott76: Can you tell me if you think pourable urethanes will work for a classroom situation? If it takes lots of time and skill to get right then that moves the job form the students to the TA. But if its an easily teachable operation then I guess the time goes into making the molds. How would you compare delrin as a mold material in relation to any other mold materials you may have experimented with? The molds for our application don't have to be particularly reusable, and it would be ideal if they were still workable with hand tools after the cnc stage- which leads me to think something like plaster is ideal. Remember these are not Mechanical engineering students, they are Electrical Engineering students, so they won't have even basic machine shop skills, and programming/ watching the cnc mill and using hand tools to fix up any mistakes in their molds will be about all that we want to allow them to do.
Thanks